GCK'S FILE SIGNATURES TABLE

03 June 2023

This table of file signatures (aka "magic numbers") is a continuing work-in-progress. I had found little information on this in a single place, with the exception of the table in Forensic Computing: A Practitioner's Guide by T. Sammes & B. Jenkinson (Springer, 2000); that was my inspiration to start this list in 2002. See also Wikipedia's List of file signatures. Comments, additions, and queries can be sent to Gary Kessler at gck@garykessler.net.

This list is not exhaustive although I add new files as I find them or someone contributes signatures. Interpret the table as a one-way function: the magic number generally indicates the file type whereas the file type does not always have the given magic number. If you want to know to what a particular file extension refers, check out some of these sites:

• File Extension Seeker: Metasearch engine for file extensions
• FILExt.com
• FileInfo.com
• Wotsit.org, The Programmer's File and Data Resource
• DOT.WHAT?
• File-Extensions.org

Some other useful information:

• My software utility page contains a custom signature file based upon this list, for use with FTK, Scalpel, Simple Carver, Simple Carver Lite, and TrID. There is also a raw CSV file and JSON file of signatures.

• The File Signatures Web site searches a database based upon file extension or file signature.

• Tim Coakley's Filesig.co.uk site, with Filesig Manager and Simple Carver. Also, see Tim's SQLite Database Catalog page, "a repository of information used to identify specific SQLite databases and properties for research purposes."

• Marco Pontello's TrID - File Identifier utility designed to identify file types from their binary signatures.

• The National Archives' PRONOM site provides on-line information about data file formats and their supporting software products, as well as their multi-platform DROID (Digital Record Object Identification) software.

• Additional details on graphics file formats can be found at The Graphics File Formats Page and the Sustainability of Digital Formats Planning for Library of Congress Collections site.

• Additional details on audio and video file formats can be found at the Sustainability of Digital Formats Planning for Library of Congress Collections site.

If you are using a Linux/MacOS/Unix system, you can use the file command to determine the file type based upon the file signature, per the system's magic file.

And, one last and final item — if you are searching for network traffic in raw binary files (e.g., RAM or unallocated space), see Hints About Looking for Network Packet Fragments.

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ACKNOWLEDGEMENTS & COPYRIGHT NOTICE

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Hex Signature		ASCII Signature
File Extension		File Description
TGA		Truevision Targa Graphic file Trailer: 54 52 55 45 56 49 53 49   TRUEVISI 4F 4E 2D 58 46 49 4C 45   ON-XFILE 2E 00                     ..
00		.
PIC		IBM Storyboard bitmap file
MOV		Apple QuickTime movie file
PIF		Windows Program Information File
SEA		Mac Stuffit Self-Extracting Archive
YTR		IRIS OCR data file
00 00 00		...
AVIF		Alliance for Open Media (AOMedia) Video 1 (AV1) Image File
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00		........ ........
XXX		Compucon/Singer embroidery design file
[11 byte offset] 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00		[11 byte offset] ........ ........ ........
PDB		Palmpilot Database/Document File
[512 (0x200) byte offset] 00 00 00 00 00 00 00 00		[512 (0x200) byte offset] ........
RVT		Revit Project File subheader
00 00 00 00 14 00 00 00		........
TBI		Windows Disk Image file
00 00 00 20 66 74 79 70 68 65 69 63		... ftyp heic
HEIC		High Efficiency Image Container (HEIC), holding one or more High Efficiency Image File (HEIF) — aka H.265 — images, created using the High Efficiency Video Coding (HEVC) algorithm. Developed by the Moving Pictures Experts Group (MPEG) and adopted by Apple as the standard image file format in 2017.
[8 byte offset] 00 00 00 00 62 31 05 00 09 00 00 00 00 20 00 00 00 09 00 00 00 00 00 00		[8 byte offset] ....b1.. ..... .. ........
DAT		Bitcoin Core wallet.dat file
00 00 00 0C 6A 50 20 20 0D 0A		....jP ..
JP2		Various JPEG-2000 image file formats
00 00 01 00		....
ICO		Windows icon file
SPL		Windows NT/2000/XP printer spool file
00 00 01 Bx		....
MPEG, MPG		MPEG video file Trailer: 00 00 01 B7 (...·)
00 00 01 BA		....º
MPG, VOB		DVD Video Movie File (video/dvd, video/mpeg) or DVD MPEG2 Trailer: 00 00 01 B9 (...¹)
00 00 02 00		......
CUR		Windows cursor file
WB2		QuattroPro for Windows Spreadsheet file
00 00 02 00 06 04 06 00 08 00 00 00 00 00		........ ......
WK1		Lotus 1-2-3 spreadsheet (v1) file
00 00 03 F3		...ó
n/a		Amiga Hunk executable file
00 00 1A 00 00 10 04 00 00 00 00 00		........ ....
WK3		Lotus 1-2-3 spreadsheet (v3) file
00 00 1A 00 02 10 04 00 00 00 00 00		........ ....
WK4, WK5		Lotus 1-2-3 spreadsheet (v4, v5) file
00 00 1A 00 05 10 04		.......
123		Lotus 1-2-3 spreadsheet (v9) file
00 00 49 49 58 50 52 or		..IIXPR
00 00 4D 4D 58 50 52		..MMXPR
QXD		Quark Express document (Intel & Motorola, respectively) NOTE: It appears that the byte following the 0x52 ("R") is the language indicator; 0x33 ("3") seems to indicate English and 0x61 ("a") reportedly indicates Korean.
00 00 FE FF		..þÿ
n/a		Byte-order mark for 32-bit Unicode Transformation Format/ 4-octet Universal Character Set (UTF-32/UCS-4), big-endian files. (See the Unicode Home Page.)
[6 byte offset] 00 00 FF FF FF FF		[6 byte offset] ..ÿÿÿÿ
HLP		Windows Help file
00 01 00 00 00		.....
TTF		TrueType font file
00 01 00 00 4D 53 49 53 41 4D 20 44 61 74 61 62 61 73 65		....MSIS AM Datab ase
MNY		Microsoft Money file
00 01 00 00 53 74 61 6E 64 61 72 64 20 41 43 45 20 44 42		....Stan dard ACE  DB
ACCDB		Microsoft Access 2007 file
00 01 00 00 53 74 61 6E 64 61 72 64 20 4A 65 74 20 44 42		....Stan dard Jet  DB
MDB		Microsoft Access file
00 01 00 08 00 01 00 01 01		........ .
IMG		Ventura Publisher/GEM VDI Image Format Bitmap file
00 01 01		...
FLT		OpenFlight 3D file
00 01 42 41		..BA
ABA		Palm Address Book Archive file
00 01 42 44		..BD
DBA		Palm DateBook Archive file
00 06 15 61 00 00 00 02 00 00 04 D2 00 00 10 00		...a.... ...Ò....
DB		Netscape Navigator (v4) database file
00 0D BB A0		..»
n/a		Mbox table of contents file. (NOTE: The next four bytes appear to be the number of e-mails in the associated mbox file.)
00 11 AF		..¯
FLI		FLIC Animation file
00 14 00 00 01 02 xx xx 03		........ .
n/a		BIOS details in RAM images
00 1E 84 90 00 00 00 00		..„.....
SNM		Netscape Communicator (v4) mail folder
00 20 AF 30		. ¯0
TPL		Wii images container
00 3B 05 00 01 00 00 00		.;......
DB		Paessler PRTG Monitoring System database file
00 5C 41 B1 FF		.\A±ÿ
ENC		Mujahideen Secrets 2 encrypted file
[512 (0x200) byte offset] 00 6E 1E F0		[512 (0x200) byte offset] .n.ð
PPT		PowerPoint presentation subheader (MS Office)
00 BF		.¿
SOL		Adobe Flash shared object file (e.g., Flash cookies)
00 FF FF FF FF FF FF FF FF FF FF 00 00 02 00 01		.ÿÿÿÿÿÿÿ ÿÿÿ.....
MDF		Alcohol 120% CD image
01 00 00 00		....
EMF		Extended (Enhanced) Windows Metafile Format, printer spool file (0x18-17 & 0xC4-36 is Win2K/NT; 0x5C0-1 is WinXP)
01 00 00 00 01		.....
PIC		Unknown type picture file
01 00 09 00 00 03		......
WMF		Windows Metadata file (Win 3.x format)
01 00 02 00		....
ARF		Webex Advanced Recording Format files.
01 00 39 30		..90
FDB, GDB		Firebird and Interbase database files, respectively. See IBPhoenix for more information.
01 01 47 19 A4 00 00 00 00 00 00 00		..G.#xA4... ....
TBI		The Bat! secure e-mail Message Base Index file
01 0F 00 00		....
MDF		Microsoft SQL Server 2000 database
01 10		..
TR1		Novell LANalyzer capture file
01 DA 01 01 00 03		.Ú....
RGB		Silicon Graphics RGB Bitmap
01 FF 02 04 03 02		.ÿ....
DRW		Micrografx vector graphic file
02 64 73 73		.dss
DSS		Digital Speech Standard (Olympus, Grundig, & Phillips), v2
03		.
DAT		MapInfo Native Data Format
DB3		dBASE III file
03 00 00 00		....
NFC		Nokia PC Suite Content Copier file
QPH		Quicken price history file
03 00 00 00 41 50 50 52		....APPR
ADX		Approach index file
03 64 73 73		.dss
DSS		Digital Speech Standard, v3
04		.
DB4		dBASE IV data file
04 00 00 00 xx xx xx xx xx xx xx xx 20 03 00 00 or		........ .... ...
05 00 00 00 xx xx xx xx xx xx xx xx 20 03 00 00		........ .... ...
n/a		INFO2 Windows recycle bin file. NOTE: Bytes 12-13 indicate the size of each INFO2 record; the most common value is 0x20-03 (0x0320 = 800 bytes).
06 06 ED F5 D8 1D 46 E5 BD 31 EF E7 FE 74 B7 1D		..íõØ.Få ½1ïçþt·.
INDD		Adobe InDesign document
06 0E 2B 34 02 05 01 01 0D 01 02 01 01 02		..+4.... ......
MXF		Material Exchange Format file
07		.
DRW		A common signature and file extension for many drawing programs.
07 53 4B 46		.SKF
SKF		SkinCrafter skin file
07 64 74 32 64 64 74 64		.dt2ddtd
DTD		DesignTools 2D Design file
08		.
DB		dBASE IV or dBFast configuration file
08 00 45		..E
n/a		Possibly, maybe, might be a fragment of an Ethernet frame carrying an IPv4 packet. See Hints About Looking for Network Packet Fragments.
[512 (0x200) byte offset] 09 08 10 00 00 06 05 00		[512 (0x200) byte offset] ........
XLS		Excel spreadsheet subheader (MS Office)
0A nn 01		...
PCX		ZSOFT Paintbrush file (where Version (nn) = 0x00, 0x02, 0x03, 0x04, or 0x05)
0A 16 6F 72 67 2E 62 69 74 63 6F 69 6E 2E 70 72		..org.bi tcoin.pr
WALLET		MultiBit Bitcoin wallet file
0C ED		.í
MP		Monochrome Picture TIFF bitmap file (unconfirmed)
0D 44 4F 43		.DOC
DOC		DeskMate Document file
0E 4E 65 72 6F 49 53 4F		.NeroISO
NRI		Nero CD Compilation
0E 57 4B 53		.WKS
WKS		DeskMate Worksheet
[512 (0x200) byte offset] 0F 00 E8 03		[512 (0x200) byte offset] ..è.
PPT		PowerPoint presentation subheader (MS Office)
0F 53 49 42 45 4C 49 55 53		.SIBELIU S
SIB		Sibelius Music - Score file
10 00 00 00		....
CL5		Easy CD Creator 5 Layout file
1A 00 00		...
NTF		Lotus Notes database template
1A 00 00 04 00 00		......
NSF		Lotus Notes database
1A 0x		..
ARC		LH archive file, old version (where x = 0x2, 0x3, 0x4, 0x8 or 0x9 for types 1-5, respectively)
1A 0B		..
PAK		Compressed archive file (often associated with Quake Engine games)
1A 35 01 00		.5..
ETH		GN Nettest WinPharoah capture file
1A 45 DF A3		.Eߣ
MKV		Matroska stream file
WEBM		WebM video file
1A 52 54 53 20 43 4F 4D 50 52 45 53 53 45 44 20 49 4D 41 47 45 20 56 31 2E 30 1A		.RTS COM PRESSED IMAGE V1 .0.
DAT		Runtime Software compressed disk image
1D 7D		.}
WS		WordStar Version 5.0/6.0 document
1F 8B 08		.‹.
GZ, TGZ		GZIP archive file
VLT		VLC Player Skin file
1F 8B 08 00		.‹..
DSS		Synology router configuration backup file
1F 9D		..
TAR.Z		Compressed tape archive file using standard (Lempel-Ziv-Welch) compression
1F A0		.
TAR.Z		Compressed tape archive file using LZH (Lempel-Ziv-Huffman) compression
21		!
BSB		Pitney Bowes' MapInfo Sea Chart format
21 0D 0A 43 52 52 2F 54 68 69 73 20 65 6C 65 63 74 72 6F 6E 69 63 20 63 68 61 72 74 20 77 61 73 20 70 72 6F 64 75 63 65 64 20 75 6E 64 65 72 20 74 68 65 20 61 75 74 68 6F 72 69 74 79 20 6F 66 20 55 53 41 2D 4E 4F 41 41 2F 4E 4F 53 2E 0D 0A		!..CRR/T his elec tronic c hart was  produce d under the auth ority of  USA-NOA A/NOS...
BSB		NOAA Raster Navigation Chart (RNC®) file (https://charts.noaa.gov/RNCs/RNCs.shtml). See also the BSB/KAP File Format specification
21 12		!.
AIN		AIN Compressed Archive
21 3C 61 72 63 68 3E 0A		!<arch>.
LIB		Unix archiver (ar) files and Microsoft Program Library Common Object File Format (COFF)
21 42 44 4E		!BDN
		Microsoft Outlook Personal Folder Files (PFF):
OST		Microsoft Outlook Offline Storage Folder File
PAB		Microsoft Outlook Personal Address Book File
PST		Microsoft Outlook Personal Folder File
23 20		#
MSI		Cerius2 file
23 20 44 69 73 6B 20 44 65 73 63 72 69 70 74 6F		# Disk D escripto
VMDK		VMware 4 Virtual Disk description file (split disk)
23 20 4D 69 63 72 6F 73 6F 66 74 20 44 65 76 65 6C 6F 70 65 72 20 53 74 75 64 69 6F		# Micros oft Deve loper St udio
DSP		Microsoft Developer Studio project file
23 20 54 68 69 73 20 69 73 20 61 6E 20 4B 65 79		# This i s an Key
ETA		Google Earth Keyhole Placemark file
23 21 41 4D 52		#!AMR
AMR		Adaptive Multi-Rate ACELP (Algebraic Code Excited Linear Prediction) Codec, commonly audio format with GSM cell phones. (See RFC 4867.)
23 21 53 49 4C 4B 0A		#!SILK.
SIL		Audio compression format developed by Skype; also used by other applications.
23 3F 52 41 44 49 41 4E 43 45 0A		#?RADIAN CE.
HDR		Radiance High Dynamic Range image file
23 40 7E 5E		#@~^
VBE		VBScript Encoded script
23 4E 42 46		#NBF
NBF		NVIDIA Scene Graph binary file
23 50 45 43 30 30 30 31 4C 41 3A		#PEC0001 LA:
PEC		Brother/Babylock/Bernina Home Embroidery file
23 50 45 53 30		#PES0
PES		Brother/Babylock/Bernina Home Embroidery file
24 46 4C 32 40 28 23 29 20 53 50 53 53 20 44 41 54 41 20 46 49 4C 45		$FL2@(#)  SPSS DA TA FILE
SAV		SPSS Statistics (née Statistical Package for the Social Sciences, then Statistical Product and Service Solutions) data file
25 21 50 53 2D 41 64 6F 62 65 2D		%!PS-Ado be-
PS		PostScript file
25 21 50 53 2D 41 64 6F 62 65 2D 33 2E 30 20 45 50 53 46 2D 33 20 30		%!PS-Ado be-3.0 E PSF-3.0
EPS		Adobe encapsulated PostScript file (If this signature is not at the immediate beginning of the file, it will occur early in the file, commonly at byte offset 30 [0x1E])
25 50 44 46		%PDF
PDF, FDF, AI		Adobe Portable Document Format, Forms Document Format, and Illustrator graphics files Trailers: 0A 25 25 45 4F 46 (.%%EOF) 0A 25 25 45 4F 46 0A (.%%EOF.) 0D 0A 25 25 45 4F 46 0D 0A (..%%EOF..) 0D 25 25 45 4F 46 0D (.%%EOF.) NOTE: There may be multiple end-of-file marks within the file. When carving, be sure to get the last one.
25 62 69 74 6D 61 70		%bitmap
FBM		Fuzzy bitmap (FBM) file
28 54 68 69 73 20 66 69 6C 65 20 6D 75 73 74 20 62 65 20 63 6F 6E 76 65 72 74 65 64 20 77 69 74 68 20 42 69 6E 48 65 78 20		(This fi le must be conve rted wit h BinHex
HQX		Macintosh BinHex 4 Compressed Archive
2A 2A 2A 20 20 49 6E 73 74 61 6C 6C 61 74 69 6F 6E 20 53 74 61 72 74 65 64 20		***  Ins tallatio n Starte d
LOG		Symantec Wise Installer log file
[2 byte offset] 2D 6C 68		[2 byte offset] -lh
LHA, LZH		Compressed archive file
2E 52 45 43		.REC
IVR		RealPlayer video file (V11 and later)
2E 52 4D 46		.RMF
RM, RMVB		RealMedia streaming media file
2E 52 4D 46 00 00 00 12 00		.RMF.... .
RA		RealAudio file
2E 72 61 FD 00		.raý.
RA		RealAudio streaming media file
2E 73 6E 64		.snd
AU		NeXT/Sun Microsystems µ-Law audio file
2F 2F 20 3C 21 2D 2D 20 3C 6D 64 62 3A 6D 6F 72 6B 3A 7A		// <!-- <mdb:mor k:z
MSF		Thunderbird|Mozilla Mail Summary File
30		0
CAT		Microsoft security catalog file
30 00 00 00 4C 66 4C 65		0...LfLe
EVT		Windows Event Viewer file
30 20 48 45 41 44		0 HEAD
GED		GEnealogical Data COMmunication (GEDCOM) file
30 26 B2 75 8E 66 CF 11 A6 D9 00 AA 00 62 CE 6C		0&²u.fÏ. ¦Ù.ª.bÎl
ASF, WMA, WMV		Microsoft Windows Media Audio/Video File (Advanced Systems Format)
30 31 4F 52 44 4E 41 4E 43 45 20 53 55 52 56 45 59 20 20 20 20 20 20 20		01ORDNAN CE SURVE Y
NTF		National Transfer Format Map File
30 37 30 37 30 nn		07070.
n/a		Archive created with the cpio utility (where nn values 0x37 ("7"), 0x31 ("1"), and 0x32 ("2") refer to the standard ASCII format, new ASCII (aka SVR4) format, and CRC format, respectively. (The swpackage(8) page has additional information.) (Thanks to F. Webber for this....)
31 BE or		1¾
32 BE		2¾
WRI		Microsoft Write file
32 03 10 00 00 00 00 00 00 00 80 00 00 00 FF 00		2....... ......ÿ.
PCS		Pfaff Home Embroidery file
34 CD B2 A1		4Ͳ¡
n/a		Extended tcpdump (libpcap) capture file (Linux/Unix)
37 7A BC AF 27 1C		7z¼¯'.
7Z		7-Zip compressed file
37 E4 53 96 C9 DB D6 07		7äS–ÛÖ.
n/a		zisofs compression format, recognized by some Linux kernels. See the libburnia page for additional information.
38 42 50 53		8BPS
PSD		Photoshop image file
3A 56 45 52 53 49 4F 4E		:VERSION
SLE		Surfplan kite project file
3C		<
ASX		Advanced Stream redirector file
XDR		BizTalk XML-Data Reduced Schema file
WSF		Windows Script Component
3C 21 64 6F 63 74 79 70		<!doctyp
DCI		AOL HTML mail file
3C 3F		<?
WSC		Windows Script Component
3C 3F 78 6D 6C 20 76 65 72 73 69 6F 6E 3D		<?xml ve rsion=
MANIFEST		Windows Visual Stylesheet XML file
3C 3F 78 6D 6C 20 76 65 72 73 69 6F 6E 3D 22 31 2E 30 22 3F 3E		<?xml ve rsion="1 .0"?>
XUL		XML User Interface Language file
3C 3F 78 6D 6C 20 76 65 72 73 69 6F 6E 3D 22 31 2E 30 22 3F 3E 0D 0A 3C 4D 4D 43 5F 43 6F 6E 73 6F 6C 65 46 69 6C 65 20 43 6F 6E 73 6F 6C 65 56 65 72 73 69 6F 6E 3D 22		<?xml ve rsion="1 .0"?>..< MMC_Cons oleFile ConsoleV ersion="
MSC		Microsoft Management Console Snap-in Control file
3C 43 54 72 61 6E 73 54 69 6D 65 6C 69 6E 65 3E		<CTransT imeline>
MXF		Picasa movie project file
3C 43 73 6F 75 6E 64 53 79 6E 74 68 65 73 69 7A		<CsoundS ynthesiz
CSD		Csound music file
3C 4B 65 79 68 6F 6C 65 3E		<Keyhole>
ETA		Google Earth Keyhole Overlay file
3C 4D 61 6B 65 72 46 69 6C 65 20		<MakerFi le
FM, MIF		Adobe FrameMaker file
3C 67 70 78 20 76 65 72 73 69 6F 6E 3D 22 31 2E 31		<gpx ver sion="1. 1
GPX		GPS eXchange file (v1.1 schema)
3C 7E 36 3C 5C 25 5F 30 67 53 71 68 3B		<~6<\%_0 gSqh;
B85		ASCII85 (aka BASE85) encoded file, sometimes used with PostScript and PDF. Trailer: 7E 3E 0A (~>.)
[24 (0x18) byte offset] 3E 00 03 00 FE FF 09 00 06		[24 (0x18) byte offset] >...þÿ.. .
WB3		Quatro Pro for Windows 7.0 Notebook file
3F 5F 03 00		?_..
GID		Windows Help index file
HLP		Windows Help file
[32 (0x20) byte offset] 40 40 40 20 00 00 40 40 40 40		[32 (0x20) byte offset] @@@ ..@@ @@
ENL		EndNote Library File
41 42 6F 78		ABox
ABOX2		Analog Box circuit files
41 43		AC
DWG		Generic AutoCAD drawing file
NOTES on AutoCAD file headers: The 0x41-43 (AC) is a generic header, occupying the first two bytes in the file. The next three or four bytes give further indication about the version (see also DWG file specifications released by OpenDesign): 0x31-2E-32 (1.2) — AutoCAD v1.2 (Release 2) 0x31-2E-33 (1.3) — AutoCAD v1.3 (Release 3) 0x31-2E-34-30 (1.40) — AutoCAD v1.40 (Release 4) 0x31-2E-35-30 (1.50) — AutoCAD v2.05 (Release 5) 0x32-2E-31-30 (2.10) — AutoCAD v2.10 (Release 6) 0x31-30-30-32 (1002) — AutoCAD v2.5 (Release 7) 0x31-30-30-33 (1003) — AutoCAD v2.6 (Release 8) 0x31-30-30-34 (1004) — AutoCAD v9.0 (Release 9) 0x31-30-30-36 (1006) — AutoCAD v10.0 (Release 10) 0x31-30-30-39 (1009) — AutoCAD v11.0 (Release 11)/v12.0 (Release 12) 0x31-30-31-32 (1012) — AutoCAD v13.0 (Release 13) 0x31-30-31-34 (1014) — AutoCAD v14.0 (Release 14) 0x31-30-31-35 (1015) — AutoCAD 2000 (v15.0)/2000i (v15.1)/2002 (v15.2) -- (Releases 15-17) 0x31-30-31-38 (1018) — AutoCAD 2004 (v16.0)/2005 (v16.1)/2006 (v16.2) -- (Releases 18-20) 0x31-30-32-31 (1021) — AutoCAD 2007 (v17.0)/2008 (v17.1)/2009 (v17.2) -- (Releases 21-23) 0x31-30-32-34 (1024) — AutoCAD 2010 (v18.0)/2011 (v18.1)/2012 (v18.2) -- (Releases 24-26) 0x31-30-32-37 (1027) — AutoCAD 2013 (v19.0)/2014 (v19.1)/2015 (v20.0)/2016 (v20.1)/2017 (v20.2) -- (Releases 27-31) 0x31-30-33-32 (1032) — AutoCAD 2018 (v22.0) (Release 32)
41 43 76		ACL
SLE		Steganos Security Suite virtual secure drive
41 43 53 44		ACSD
n/a		Miscellaneous AOL parameter and information files
41 45 53		AES
AES		AES Crypt file format. (The fourth byte is the version number.)
41 4D 59 4F		AMYO
SYW		Harvard Graphics symbol graphic
41 4F 4C 20 46 65 65 64 62 61 67		AOL Feed bag
BAG		AOL and AIM buddy list file
41 4F 4C 44 42		AOLDB
ABY, IDX		AOL database files: address book (ABY) and user configuration data (MAIN.IDX)
41 4F 4C 49 44 58		AOLIDX
IND		AOL client preferences/settings file (MAIN.IND)
41 4F 4C 49 4E 44 45 58		AOLINDEX
ABI		AOL address book index file
41 4F 4C 56 4D 31 30 30		AOLVM100
ORG, PFC		AOL personal file cabinet (PFC) file NOTE: See PFC-Details.zip for PFC file format information.
41 56 47 36 5F 49 6E 74 65 67 72 69 74 79 5F 44 61 74 61 62 61 73 65		AVG6_Int egrity_D atabase
DAT		AVG6 Integrity database file
41 72 43 01		ArC.
ARC		FreeArc compressed file
42 41 41 44		BAAD
n/a		NTFS Master File Table (MFT) entry (1,024 bytes)
42 44 69 63		BDic
BDIC		Google Chrome dictionary file
42 45 47 49 4E 3A 56 43 41 52 44 0D 0A		BEGIN:VC ARD..
VCF		vCard file
42 4C 49 32 32 33		BLI223
BLI, RBI		Thomson Speedtouch series WLAN router firmware
NOTES on BLI/RBI file headers: The signature above is correct for the generic first six bytes. Reportedly, the 7th & 8th bytes vary by version, and the 9th byte is always 0x30. v6.0.7.1 (.bli) — 0x42-4C-49-32-32-33-51-4B-30 (BLI223QK0) v7.4.1.7 (.bli) — 0x42-4C-49-32-32-33-51-48-30 (BLI223QH0) v8.2.2.5 (.bli) — 0x42-4C-49-32-32-33-55-46-30 (BLI223UF0) v8.4.3 (.bli/.rbi) — 0x42-4C-49-32-32-33-57-31-30 (BLI223W10)
42 4D		BM
BMP, DIB		Windows (or device-independent) bitmap image NOTE: Bytes 2-5 contain the file length in little-endian order.
42 4F 4F 4B 4D 4F 42 49		BOOKMOBI
PRC		Palmpilot resource file
42 50 47 FB		BPG#xFB;
BPG		Better Portable Graphics image format
42 5A 68		BZh
BZ2, TAR.BZ2, TBZ2, TB2		bzip2 compressed archive
DMG		Mac Disk image (BZ2 compressed)
42 65 67 69 6E 20 50 75 66 66 65 72 20 44 61 74 61 0D 0A		Begin Pu ffer Dat a..
APUF		Puffer ASCII-armored encrypted archive
42 6C 69 6E 6B 20 62 79 20 44 2E 54 2E 53		Blink by D.T.S
BLI		BLINK compressed archive
43 23 2B 44 A4 43 4D A5 48 64 72		C#+D¤CM¥ Hdr
RTD		RagTime document file
43 41 54 20		CAT
IFF		Electronic Arts' Interchange Format Files (IFF) format.
43 42 46 49 4C 45		CBFILE
CBD		WordPerfect dictionary file (unconfirmed)
43 44 30 30 31		CD001
ISO		ISO-9660 CD Disc Image This signature usually occurs at byte offset 32769 (0x8001), 34817 (0x8801), or 36865 (0x9001). More information can be found at MacTech or at ECMA.
43 49 53 4F		CISO
CSO		Compressed ISO (CISO) CD image
43 4D 4D 4D 15 00 00 00		CMMM....
DB		Windows 7 thumbcache_sr.db or other thumbcache file (except thumbcache_idx.db)
43 4D 58 31		CMX1
CLB		Corel Binary metafile
43 4F 4D 2B		COM+
CLB		COM+ Catalog file
43 4F 57 44		COWD
VMDK		VMware 3 Virtual Disk (portion of a split disk) file
43 50 54 37 46 49 4C 45		CPT7FILE
CPT		Corel Photopaint file
43 50 54 46 49 4C 45		CPTFILE
CPT		Corel Photopaint file
43 52 45 47		CREG
DAT		Windows 9x registry hive
43 52 55 53 48 20 76		CRUSH v
CRU		Crush compressed archive
43 57 53		CWS
SWF		Macromedia Shockwave Flash player file (zlib compressed, SWF 6 and later). See SWF File Format Specification.
43 61 6C 63 75 6C 75 78 20 49 6E 64 6F 6F 72 20		Calculux Indoor
CIN		Calculux Indoor lighting design software project file
43 61 74 61 6C 6F 67 20 33 2E 30 30 00		Catalog 3.00.
CTF		WhereIsIt Catalog file
43 6C 69 65 6E 74 20 55 72 6C 43 61 63 68 65 20 4D 4D 46 20 56 65 72 20		Client U rlCache MMF Ver
DAT		Microsoft Internet Explorer cache file (index.dat) file
43 72 32 34		Cr24
CRX		Google Chrome Extension
43 72 4F 44		CrOD
CRX		Google Chromium patch update
43 72 65 61 74 69 76 65 20 56 6F 69 63 65 20 46		Creative Voice F
VOC		Creative Voice audio file
44 41 41 00 00 00 00 00		DAA.....
DAA		PowerISO Direct-Access-Archive image
44 41 58 00		DAX.
DAX		DAX Compressed CD image
44 42 46 48		DBFH
DB		Palm Zire photo database
44 4D 53 21		DMS!
DMS		Amiga DiskMasher compressed archive
44 4F 53		DOS
ADF		Amiga disk file
44 53 44 20		DSD
DSF		DSD Storage Facility audio file
44 53 54 62		DSTb
DST		DST compressed file
44 56 44		DVD
DVR		DVR-Studio stream file
IFO		DVD info file
45 4C 49 54 45 20 43 6F 6D 6D 61 6E 64 65 72 20		ELITE Co mmander
CDR		Elite Plus Commander saved game file
45 4E 54 52 59 56 43 44 02 00 00 01 02 00 18 58		ENTRYVCD .......X
VCD		VideoVCD (GNU VCDImager) file
45 52 02 00 00		CD...
ISO		Apple ISO 9660/HFS hybrid CD image
45 52 46 53 53 41 56 45 44 41 54 41 46 49 4C 45		ERFSSAVE DATAFILE
DAT		Kroll EasyRecovery Saved Recovery State file
45 50		EP
MDI		Microsoft Document Imaging file
45 56 46 09 0D 0A FF 00		EVF...ÿ.
Enn (where nn are numbers)		Expert Witness Compression Format (EWF) file, including EWF-E01 and EWF-S01, as used in EnCase and SMART evidence files. Byte offset 9 (i.e., byte #10) contains the segment number, starting with 0x01. See the EWF specification.
45 56 46 32 0D 0A 81		EVF2...
Exnn (where nn are numbers)		EnCase® Evidence File Format Version 2 (Ex01). See the EVFv2 specification.
45 6C 66 46 69 6C 65 00		ElfFile.
EVTX		Windows Vista event log file
45 86 00 00 06 00		E†....
QBB		Intuit QuickBooks backup file
46 41 58 43 4F 56 45 52 2D 56 45 52		FAXCOVER -VER
CPE		Microsoft Fax Cover Sheet
46 44 42 48 00		FDBH.
FDB		Fiasco database definition file
46 45 44 46		FEDF
SBV		(Unknown file type)
46 49 4C 45		FILE
n/a		NTFS Master File Table (MFT) entry (1,024 bytes)
46 4C 56 01		FLV.
FLV		Flash video file
46 4F 52 4D		FORM
ANM		IFF ANIM (Amiga delta/RLE encoded bitmap animation) file
IFF		Electronic Arts' Interchange Format Files (IFF) format.
46 4F 52 4D 00		FORM.
AIFF		Audio Interchange File
DAX		DAKX Compressed Audio
46 57 53		FWS
SWF		Macromedia Shockwave Flash player file (uncompressed). See SWF File Format Specification.
46 72 6F 6D 20 20 20 or		From
46 72 6F 6D 20 3F 3F 3F or		From ???
46 72 6F 6D 3A 20		From:
EML		A commmon file extension for e-mail files. Signatures shown here are for Netscape, Eudora, and a generic signature, respectively. EML is also used by Outlook Express and QuickMail.
47		G
TS, TSA, TSV		MPEG transport stream file. (This is not a lot to go on, but MPEG-2 Part 1 Transport (MP2T) files are reportedly broken into 188-byte packets and the 0x47 byte is the sync byte, so should repeat every 188 bytes in the file.)
47 46 31 50 41 54 43 48		GF1PATCH
PAT		Advanced Gravis Ultrasound patch file
47 49 46 38 37 61 or		GIF87a
47 49 46 38 39 61		GIF89a
GIF		Graphics interchange format file Trailer: 00 3B (.;)
47 50 41 54		GPAT
PAT		GIMP (GNU Image Manipulation Program) pattern file
47 52 49 42		GRIB
GRB		GRIdded Binary or General Regularly-distributed Information in Binary file, commonly used in meteorology to store historical and forecast weather data
47 58 32		GX2
GX2		Show Partner graphics file (not confirmed)
47 65 6E 65 74 65 63 20 4F 6D 6E 69 63 61 73 74		Genetec Omnicast
G64		Genetec video archive
48 44 52 2A 50 6F 77 65 72 42 75 69 6C 64 65 72		HDR*Powe rBuilder
PBD		SAP PowerBuilder integrated development environment file
48 45 41 44 45 52 20 52 45 43 4F 52 44 2A 2A 2A		HEADER R ECORD***
XPT		SAS Transport dataset file format
48 48 47 42 31		HHGB1
SH3		Harvard Graphics presentation file
49 20 49		I I
TIF, TIFF		Tagged Image File Format file
49 44 33		ID3
MP3		MPEG-1 Audio Layer 3 (MP3) audio file
49 44 33 03 00 00 00		ID3....
KOZ		Sprint Music Store audio file (for mobile devices)
49 49 1A 00 00 00 48 45 41 50 43 43 44 52 02 00		II....HE APCCDR..
CRW		Canon digital camera RAW file
49 49 2A 00		II*.
TIF, TIFF		Tagged Image File Format file (little endian, i.e., LSB first in the byte; Intel)
49 49 2A 00 10 00 00 00 43 52		II*..... CR
CR2		Canon digital camera RAW file
49 4D 4D 4D 15 00 00 00		IMMM....
DB		Windows 7 thumbcache_idx.db file
49 53 63 28		ISc(
CAB, HDR		Install Shield v5.x or 6.x compressed file
49 54 4F 4C 49 54 4C 53		ITOLITLS
LIT		Microsoft Reader eBook file
49 54 53 46		ITSF
CHI, CHM		Microsoft Compiled HTML Help File
49 6E 6E 6F 20 53 65 74 75 70 20 55 6E 69 6E 73 74 61 6C 6C 20 4C 6F 67 20 28 62 29		Inno Set up Unins tall Log  (b)
DAT		Inno Setup Uninstall Log file
49 6E 74 65 72 40 63 74 69 76 65 20 50 61 67 65		Inter@ct ive Page
IPD		Inter@ctive Pager Backup (BlackBerry) backup file (See also this IPD File Format paper)
4A 41 52 43 53 00		JARCS.
JAR		JARCS compressed archive
4A 47 03 0E or		JG..
4A 47 04 0E		JG..
ART		AOL ART file Trailers: For 0x4A-47-03-0E: D0 CB 00 00 (ÐË..) For 0x4A-47-04-0E: CF C7 CB (ÏÇË)
4B 44 4D		KDM
VMDK		VMware 4 Virtual Disk (portion of a split disk) file
4B 44 4D 56		KDMV
VMDK		VMware 4 Virtual Disk (monolitic disk) file
4B 47 42 5F 61 72 63 68 20 2D		KGB_arch  -
KGB		KGB archive
4B 49 00 00		KI..
SHD		Windows 9x printer spool file
4B 57 41 4A 88 F0 27 D1		KWAJˆð'Ñ
n/a		KWAJ file format used by DOS COMPRESS.EXE and EXPAND.EXE commands. This command compresses a single file, replacing the last character in the file name with an underscore or dollar sign, e.g., FOO.BAZ would be renamed FOO.BA_ or FOO.BA$. (See the SZDD/KWAJ page for more information.)
4C 00 00 00 01 14 02 00		L.......
LNK		Windows shell link (shortcut) file. See also The Meaning of Linkfiles in Forensic Examinations and Evidentiary Value of Link Files.
4C 01		L.
OBJ		Microsoft Common Object File Format (COFF) relocatable object code file for an Intel 386 or later/compatible processors
4C 41 3A		LA:
DST		Tajima embroidery sticj image file
4C 49 53 54		LIST
IFF		Electronic Arts' Interchange Format Files (IFF) format.
4C 4E 02 00		LN..
GID		Windows Help index file
HLP		Windows Help file
4C 50 46 20 00 01		LPF ..
ANM		DeluxePaint Animation file
4C 56 46 09 0D 0A FF 00		LVF...ÿ.
Enn (where nn are numbers)		Logical File Evidence Format (EWF-L01) as used in later versions of EnCase evidence files. See the EWF specification.
4D 2D 57 20 50 6F 63 6B 65 74 20 44 69 63 74 69		M-W Pock et Dicti
PDB		Merriam-Webster Pocket Dictionary file
4D 41 52 31 00		MAR1.
MAR		Mozilla archive
4D 41 52 43		MARC
MAR		Microsoft/MSN MARC archive
4D 41 54 4C 41 42 20 35 2E 30 20 4D 41 54 2D 66 69 6C 65		MATLAB 5 .0 MAT-f ile
MAT		MATLAB v5 workspace file (includes creation timestamp)
4D 41 72 30 00		MAr0.
MAR		MAr compressed archive
4D 43 57 20 54 65 63 68 6E 6F 67 6F 6C 69 65 73		MCW Tech nogolies
MTE		TargetExpress target file
4D 44 4D 50 93 A7		MDMPҤ
HDMP		Windows heap dump file
DMP		Windows minidump file
4D 49 4C 45 53		MILES
MLS		Milestones v1.0 project management and scheduling software (Also see "MV2C" and "MV214" signatures)
4D 4C 53 57		MLSW
MLS		Skype localization data file
4D 4D 00 2A		MM.*
TIF, TIFF		Tagged Image File Format file (big endian, i.e., LSB last in the byte; Motorola)
4D 4D 00 2B		MM.+
TIF, TIFF		BigTIFF files; Tagged Image File Format files >4 GB
4D 4D 4D 44 00 00		MMMD..
MMF		Yamaha Corp. Synthetic music Mobile Application Format (SMAF) for multimedia files that can be played on hand-held devices.
4D 52 56 4E		MRVN
NVRAM		VMware BIOS (non-volatile RAM) state file
4D 53 43 46		MSCF
CAB		Microsoft cabinet file
ONEPKG		OneNote Package file
PPZ		Powerpoint Packaged Presentation
SNP		Microsoft Access Snapshot Viewer file
4D 53 46 54 02 00 01 00		MSFT....
TLB		OLE, SPSS, or Visual C++ type library file
4D 53 48 7C 5E 7E 5C 26 7C		MSH|^~\& |
HL7		Health Level-7 data (pipe delimited) file
4D 53 57 49 4D		MSWIM
WIM		Microsoft Windows Imaging Format file
4D 53 5F 56 4F 49 43 45		MS_VOICE
CDR, DVF		Sony Compressed Voice File
MSV		Sony Memory Stick Compressed Voice file
4D 54 68 64		MThd
MID, MIDI		Musical Instrument Digital Interface (MIDI) sound file
PCS		Yamaha Piano sound file
4D 56		MV
DSN		CD Stomper Pro label file
4D 56 32 31 34		MV214
MLS		Milestones v2.1b project management and scheduling software (Also see "MILES" and "MV2C" signatures)
4D 56 32 43		MV2C
MLS		Milestones v2.1a project management and scheduling software (Also see "MILES" and "MV214" signatures)
4D 5A		MZ
COM, DLL, DRV, EXE, PIF, QTS, QTX, SYS		Windows/DOS executable file (See The MZ EXE File Format page for the structure of an EXE file, with coverage of NE, TLINK, PE, self-extracting archives, and more.) Note: MZ are the initals of Mark Zbikowski, designer of the DOS executable file format.
ACM		MS audio compression manager driver
AX		Library cache file
CPL		Control panel application
FON		Font file
OCX		ActiveX or OLE Custom Control
OLB		OLE object library
SCR		Screen saver
VBX		VisualBASIC application
VXD, 386		Windows virtual device drivers
4D 5A 90 00 03 00 00 00		MZ......
API		Acrobat plug-in
AX		DirectShow filter
FLT		Audition graphic filter file (Adobe)
4D 5A 90 00 03 00 00 00 04 00 00 00 FF FF		MZ...... ....ÿÿ
ZAP		ZoneAlam data file
4D 69 63 72 6F 73 6F 66 74 20 43 2F 43 2B 2B 20		Microsof t C/C++
PDB		Microsoft C++ debugging symbols file
4D 69 63 72 6F 73 6F 66 74 20 56 69 73 75 61 6C 20 53 74 75 64 69 6F 20 53 6F 6C 75 74 69 6F 6E 20 46 69 6C 65		Microsof t Visual  Studio Solution  File
SLN		Visual Studio .NET Solution file
[84 (0x54) byte offset] 4D 69 63 72 6F 73 6F 66 74 20 57 69 6E 64 6F 77 73 20 4D 65 64 69 61 20 50 6C 61 79 65 72 20 2D 2D 20		[84 (0x54) byte offset] Microsof t Window s Media Player - -
WPL		Windows Media Player playlist
4D 73 52 63 66		MsRcf
GDB		VMapSource GPS Waypoint Database
4E 41 56 54 52 41 46 46 49 43		NAVTRAFF IC
DAT		TomTom traffic data file
4E 42 2A 00		NB*.
JNT, JTP		MS Windows journal file
4E 45 53 4D 1A 01		NESM..
NSF		NES Sound file
4E 49 54 46 30		NITF0
NTF		National Imagery Transmission Format (NITF) file
4E 61 6D 65 3A 20		Name:
COD		Agent newsreader character map file
4F 50 43 4C 44 41 54		OPCLDAT
attachment		1Password 4 Cloud Keychain encrypted attachment
4F 50 4C 44 61 74 61 62 61 73 65 46 69 6C 65		OPLDatab aseFile
DBF		Psion Series 3 Database file
4F 54 54 4F 00		OTTO.
OTF		OpenType font file
4F 67 67 53 00 02 00 00 00 00 00 00 00 00		OggS.... ......
OGA, OGG, OGV, OGX		Ogg Vorbis Codec compressed Multimedia file
4F 7B		O{
DW4		Visio/DisplayWrite 4 text file (unconfirmed)
50 00 00 00 20 00 00 00		P... ...
IDX		Quicken QuickFinder Information File
50 35 0A		P5.
PGM		Portable Graymap Graphic
50 41 43 4B		PACK
PAK		Quake archive file
50 41 47 45 44 55 36 34		PAGEDU64
DMP		Windows 64-bit memory dump
50 41 47 45 44 55 4D 50		PAGEDUMP
DMP		Windows memory dump
50 41 58		PAX
PAX		PAX password protected bitmap
50 45 53 54		PEST
DAT		PestPatrol data/scan strings
50 47 50 64 4D 41 49 4E		PGPdMAIN
PGD		PGP disk image
50 49 43 54 00 08		PICT..
IMG		ADEX Corp. ChromaGraph Graphics Card Bitmap Graphic file
50 4B 03 04		PK..
ZIP		PKZIP archive file (Ref. 1 | Ref. 2) Trailer: filename 50 4B 17 characters 00 00 00 Trailer: (filename PK 17 characters ...) Note: PK are the initals of Phil Katz, co-creator of the ZIP file format and author of PKZIP.
ZIP		Apple Mac OS X Dashboard Widget, Aston Shell theme, Oolite eXpansion Pack, Opera Widget, Pivot Style Template, Rockbox Theme package, Simple Machines Forums theme, SubEthaEdit Mode, Trillian zipped skin, Virtual Skipper skin
APK		Android package
JAR		Java archive; compressed file package for classes and data
KMZ		Google Earth saved working session file
KWD		KWord document
ODT, ODP, OTT		OpenDocument text document, presentation, and text document template, respectively.
OXPS		Microsoft Open XML paper specification file
SXC, SXD, SXI, SXW		OpenOffice spreadsheet (Calc), drawing (Draw), presentation (Impress), and word processing (Writer) files, respectively.
SXC		StarOffice spreadsheet
WMZ		Windows Media compressed skin file
XPI		Mozilla Browser Archive
XPS		XML paper specification file
XPT		eXact Packager Models
50 4B 03 04 0A 00 02 00		PK......
EPUB		Open Publication Structure eBook file. (Should also include the string: mimetypeapplication/epub+zip)
50 4B 03 04 14 00 01 00 63 00 00 00 00 00		PK...... c.....
ZIP		ZLock Pro encrypted ZIP
50 4B 03 04 14 00 06 00		PK......
DOCX, PPTX, XLSX		Microsoft Office Open XML Format (OOXML) Document NOTE: There is no subheader for MS OOXML files as there is with DOC, PPT, and XLS files. To better understand the format of these files, rename any OOXML file to have a .ZIP extension and then unZIP the file; look at the resultant file named [Content_Types].xml to see the content types. In particular, look for the <Override PartName= tag, where you will find word, ppt, or xl, respectively. Trailer: Look for 50 4B 05 06 (PK..) followed by 18 additional bytes at the end of the file.
50 4B 03 04 14 00 08 00 08 00		PK...... ..
JAR		Java archive
50 4B 05 06		PK..
ZIP		PKZIP empty archive file
50 4B 07 08		PK..
ZIP		PKZIP multivolume archive file
[30 (0x1E) byte offset] 50 4B 4C 49 54 45		[30 (0x1E) byte offset] PKLITE
ZIP		PKLITE compressed ZIP archive (see also PKZIP)
[526 (0x20E) byte offset] 50 4B 53 70 58		[526 (0x20E) byte offset] PKSFX
ZIP		PKSFX self-extracting executable compressed file (see also PKZIP)
50 4D 43 43		PMCC
GRP		Windows Program Manager group file
50 4E 43 49 55 4E 44 4F		PNCIUNDO
DAT		Norton Disk Doctor undo file
50 4D 4F 43 43 4D 4F 43		PMOCCMOC
DAT		Microsoft® Windows® User State Migration Tool (USMT). USMT 3.0 applies to Windows XP and Windows Vista®, and USMT 4.0 is for Windows 7.
50 53 46 12		PSF.
DSF		Dreamcast Sound Format file, a subset of the Portable Sound Format.
50 55 46 58		PUFX
PUF		Puffer encrypted archive
50 61 56 45		PaVE
n/a		Parrot Video Encapsulation file
[92 (0x5C) byte offset] 51 45 4C 20		[92 (0x5C) byte offset] QEL
QEL		Quicken data file
51 46 49 FB		QFIû
IMG		QEMU Qcow Disk Image
51 57 20 56 65 72 2E 20		QW Ver.
ABD, QSD		Quicken data file
[512 (0x200) byte offset] 52 00 6F 00 6F 00 74 00 20 00 45 00 6E 00 74 00 72 00 79 00		[512 (0x200) byte offset] R.o.o.t. .E.n.t. r.y.
MSG		Outlook/Exchange message subheader (MS Office)
52 41 5A 41 54 44 42 31		RAZATDB1
DAT		Shareaza (Windows P2P client) thumbnail
52 44 58 32 0A		RDX2.
RDATA		R (programming language) saved work space
52 45 47 45 44 49 54		REGEDIT
REG, SUD		Windows NT Registry and Registry Undo files
52 45 56 4E 55 4D 3A 2C		REVNUM:,
ADF		Antenna data file
52 49 46 46		RIFF
ANI		Windows animated cursor
CMX		Corel Presentation Exchange (Corel 10 CMX) Metafile
CDR		CorelDraw document
DAT		Video CD MPEG or MPEG1 movie file
DS4		Micrografx Designer v4 graphic file
4XM		4X Movie video
52 49 46 46 xx xx xx xx 41 56 49 20 4C 49 53 54		RIFF.... AVI LIST
AVI		Resource Interchange File Format -- Windows Audio Video Interleave file, where xx xx xx xx is the file size (little endian)
52 49 46 46 xx xx xx xx 43 44 44 41 66 6D 74 20		RIFF.... CDDAfmt
CDA		Resource Interchange File Format -- Compact Disc Digital Audio (CD-DA) file, where xx xx xx xx is the file size (little endian)
52 49 46 46 xx xx xx xx 51 4C 43 4D 66 6D 74 20		RIFF.... QLCMfmt
QCP		Resource Interchange File Format -- Qualcomm PureVoice, where xx xx xx xx is the file size (little endian)
52 49 46 46 xx xx xx xx 52 4D 49 44 64 61 74 61		RIFF.... RMIDdata
RMI		Resource Interchange File Format -- Windows Musical Instrument Digital Interface file, where xx xx xx xx is the file size (little endian)
52 49 46 46 xx xx xx xx 57 41 56 45 66 6D 74 20		RIFF.... WAVEfmt
WAV		Resource Interchange File Format -- Audio for Windows file, where xx xx xx xx is the file size (little endian)
52 49 46 46 xx xx xx xx 57 45 42 50		RIFF.... WEBP
WEBP		Google WebP image file, where xx xx xx xx is the file size
52 54 53 53		RTSS
CAP		Windows NT Netmon capture file
52 61 72 21 1A 07 00		Rar!...
RAR		RAR (v4.x) compressed archive file
52 61 72 21 1A 07 01 00		Rar!....
RAR		RAR (v5) compressed archive file
52 65 74 75 72 6E 2D 50 61 74 68 3A 20		Return-P ath:
EML		A commmon file header for e-mail files.
[4 byte offset] 53 43 43 41		[4 byte offset] SCCA
PF		Windows prefetch file. The first four bytes indicate the OS: 0x11-00-00-00 = XP, 0x17-00-00-00 = Vista/Win7, and 0x1A-00-00-00 = Win8.1 (and probably Win8, as well).
53 43 48 6C		SCHl
AST		Need for Speed: Underground Audio file
53 43 4D 49		SCMI
IMG		Img Software Set Bitmap
53 44 50 58		SDPX
DPX		Society of Motion Picture and Television Engineers (SMPTE) Digital Picture Exchange (DPX) image file (big endian)
53 48 4F 57		SHOW
SHW		Harvard Graphics DOS Ver. 2/x Presentation file
53 49 45 54 52 4F 4E 49 43 53 20 58 52 44 20 53 43 41 4E		SIETRONI CS XRD S CAN
CPI		Sietronics CPI XRD document
53 49 4D 50 4C 45 20 20 3D 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 54		SIMPLE =      T
FITS		Flexible Image Transport System (FITS), Version 3.0 file
53 49 54 21 00		SIT!.
SIT		StuffIt compressed archive
53 4D 41 52 54 44 52 57		SMARTDRW
SDR		SmartDraw Drawing file
53 50 46 49 00		SPFI.
SPF		StorageCraft ShadownProtect backup file
53 50 56 42		SPVB
SPVCHAIN		MultiBit Bitcoin blockchain file
53 51 4C 4F 43 4F 4E 56 48 44 00 00 31 2E 30 00		SQLOCONV HD..1.0.
CNV		DB2 conversion file
53 51 4C 69 74 65 20 66 6F 72 6D 61 74 20 33 00		SQLite f ormat 3.
DB		SQLite database file
53 5A 20 88 F0 27 33 D1		SZ ˆð'3Ñ
n/a		QBASIC SZDD file header variant. (See the SZDD or KWAJ format entries for additional information.)
53 5A 44 44 88 F0 27 33		SZDDˆð'3
n/a		SZDD file format used by DOS COMPRESS.EXE and EXPAND.EXE commands. This command compresses a single file, replacing the last character in the file name with an underscore or dollar sign, e.g., FOO.BAZ would be renamed FOO.BA_ or FOO.BA$. (See the SZDD/KWAJ page for more information.)
53 6D 62 6C		Smbl
SYM		(Unconfirmed file type. Likely type is Harvard Graphics Version 2.x graphic symbol or Windows SDK graphic symbol)
53 74 75 66 66 49 74 20 28 63 29 31 39 39 37 2D		StuffIt (c)1997-
SIT		StuffIt compressed archive
53 75 70 65 72 43 61 6C 63		SuperCal c
CAL		SuperCalc worksheet
54 48 50 00		THP.
THP		Wii/GameCube video file
54 68 69 73 20 69 73 20		This is
INFO		UNIX GNU Info Reader File
55 43 45 58		UCEX
UCE		Unicode extensions
55 46 41 C6 D2 C1		UFAÆÒÁ
UFA		UFA compressed archive
55 46 4F 4F 72 62 69 74		UFOOrbit
DAT		UFO Capture v2 map file
55 6E 46 69 6E 4D 46		UnFinMF
MF4		Unfinalized Measurement Data Format (MDF) file
56 43 50 43 48 30		VCPCH0
PCH		Visual C PreCompiled header file
56 45 52 53 49 4F 4E 20		VERSION
CTL		Visual Basic User-defined Control file
56 65 72 73 69 6F 6E 20		Version
MIF		MapInfo Interchange Format file
57 04 00 00 53 50 53 53 20 74 65 6D 70 6C 61 74		W...SPSS templat
SCT		SPSS Statistics (née Statistical Package for the Social Sciences, then Statistical Product and Service Solutions) template file
57 4D 4D 50		WMMP
DAT		Walkman MP3 container file
57 53 32 30 30 30		WS2000
WS2		WordStar for Windows Ver. 2 document
[29,152 (0x71E0) byte offset] 57 69 6E 5A 69 70		[29,152 (0x71E0) byte offset] WinZip
ZIP		WinZip compressed archive
57 6F 72 64 50 72 6F		WordPro
LWP		Lotus WordPro document.
58 2D		X-
EML		A commmon file extension for e-mail files. This variant is for Exchange.
58 43 50 00		XCP.
CAP		Cinco NetXRay, Network General Sniffer, and Network Associates Sniffer capture file
58 50 43 4F 4D 0A 54 79 70 65 4C 69 62		XPCOM.Ty peLib
XPT		XPCOM type libraries for the XPIDL compiler
58 50 44 53		XPDS
DPX		Society of Motion Picture and Television Engineers (SMPTE) Digital Picture Exchange (DPX) image file (little endian)
58 54		XT..
BDR		MS Publisher border
5A 4F 4F 20		ZOO
ZOO		ZOO compressed archive
5A 57 53		ZWS
SWF		Macromedia Shockwave Flash player file (LZMA compressed, SWF 13 and later). See SWF File Format Specification.
5B 47 65 6E 65 72 61 6C 5D 0D 0A 44 69 73 70 6C 61 79 20 4E 61 6D 65 3D 3C 44 69 73 70 6C 61 79 4E 61 6D 65		[General ]..Displ ay Name= <Display Name
ECF		MS Exchange 2007 extended configuration file
5B 4D 53 56 43		[MSVC
VCW		Microsoft Visual C++ Workbench Information File
5B 50 68 6F 6E 65 5D		[Phone]
DUN		Dial-up networking file
5B 56 45 52 5D or		[VER]
5B 76 65 72 5D or		[ver]
SAM		Lotus AMI Pro document
5B 56 4D 44 5D or		[VMD]
VMD		VocalTec VoIP media file
[2 byte offset] 5B 56 65 72 73 69 6F 6E		[2 byte offset] [Version
CIF		(Unknown file type)
5B 57 69 6E 64 6F 77 73 20 4C 61 74 69 6E 20		[Windows  Latin
CPX		Microsoft Code Page Translation file
5B 66 6C 74 73 69 6D 2E 30 5D		[fltsim. 0]
CFG		Flight Simulator Aircraft Configuration file
5B 70 6C 61 79 6C 69 73 74 5D		[playlis t]
PLS		WinAmp Playlist file
5D FC C8 00		]üÈ.
HUS		Husqvarna Designer I Embroidery Machine file
5F 27 A8 89		_'¨‰
JAR		Jar archive
5F 43 41 53 45 5F		_CASE_
CAS, CBK		EnCase case file (and backup)
60 EA		`ê
ARJ		Compressed archive file
62 65 67 69 6E		begin
n/a		UUencoded files start with a string:   begin mode path where mode is the set of permissions as used in Linux/Unix and path is the name given to the decoded file. (See this uuencode page for more information.)
62 65 67 69 6E 2D 62 61 73 65 36 34		begin-ba se64
b64		UUencoded BASE64 file Trailer: 0A 3D 3D 3D 3D 0A (.====.)
62 70 6C 69 73 74		bplist
plist		Binary property list (plist) (NOTE: Next two bytes are the version number, currently 0x30-30, or "00")
63 61 66 66		caff
CAF		Apple Core Audio File
63 64 73 61 65 6E 63 72		cdsaencr
DMG		Macintosh encrypted Disk image (v1)
63 6F 6E 65 63 74 69 78		conectix
VHD		Virtual PC Virtual HD image
63 75 73 68 00 00 00 02 00 00 00		cush.... ...
CSH		Photoshop Custom Shape
64 00 00 00		d...
P10		Intel PROset/Wireless Profile
64 38 3A 61 6E 6E 6F 75 6E 63 65		d8:annou nce
TORRENT		Torrent file
64 65 78 0A		dex.
dex		Dalvik executable file (Android)
64 6E 73 2E		dns.
AU		Audacity audio file
64 73 77 66 69 6C 65		dswfile
DSW		Microsoft Visual Studio workspace file
65 6E 63 72 63 64 73 61		encrcdsa
DMG		Macintosh encrypted Disk image (v2)
66 49 00 00		fI..
SHD		Windows NT printer spool file
66 4C 61 43 00 00 00 22		fLaC..."
FLAC		Free Lossless Audio Codec file
[4 byte offset] 66 74 79 70 33 67 70		[4 byte offset] ftyp3gp
3GG, 3GP, 3G2		3rd Generation Partnership Project 3GPP multimedia files
[4 byte offset] 66 74 79 70 4D 34 41 20		[4 byte offset] ftypM4A
M4A		Apple Lossless Audio Codec file
[4 byte offset] 66 74 79 70 4D 34 56 20		[4 byte offset] ftypM4V
FLV, M4V		ISO Media, MPEG v4 system, or iTunes AVC-LC file
[4 byte offset] 66 74 79 70 4D 53 4E 56		[4 byte offset] ftypMSNV
MP4		MPEG-4 video file
[4 byte offset] 66 74 79 70 69 73 6F 6D		[4 byte offset] ftypisom
MP4		ISO Base Media file (MPEG-4) v1
[4 byte offset] 66 74 79 70 6D 70 34 32		[4 byte offset] ftypmp42
M4V		MPEG-4 video|QuickTime file
[4 byte offset] 66 74 79 70 71 74 20 20		[4 byte offset] ftypqt
MOV		QuickTime movie file
67 49 00 00		gI..
SHD		Windows 2000/XP printer spool file
67 69 6d 70 20 78 63 66 20		gimp xcf
XCF		GNU Image Manipulation Program (GIMP) eXperimental Computing Facility (XCF) image file
68 49 00 00		hI..
SHD		Windows Server 2003 printer spool file
69 63 6E 73		icns
ICNS		MacOS icon file
6C 33 33 6C		l33l
DBB		Skype user data file (profile and contacts)
[4 byte offset] 6D 6F 6F 76		[4 byte offset] moov
MOV		QuickTime movie file
.MOV files have a complicated file signature. The string "moov" is the most common but I have also seen:   0x66-72-65-65   free   0x6D-64-61-74   mdat   0x77-69-64-65   wide And the following have been reported to me:   0x70-6E-6F-74   pnot   0x73-6B-69-70   skip Furthermore, if you look at byte position xxxxxxxx+4 (where xxxxxxxx is bytes 0-3 of the header), you will find one (or more!) of these strings repeated; the string "free" seems to be the most common. For more information, see the QuickTime File Format page. (Thanks to D. Wright for getting me started on this!)
6D 73 46 69 6C 74 65 72 4C 69 73 74		msFilter List
TPL		Internet Explorer v11 Tracking Protection List file
6D 75 6C 74 69 42 69 74 2E 69 6E 66 6F		multiBit .info
INFO		MultiBit Bitcoin wallet information file
6F 3C		o<
n/a		Short Message Service (SMS), or text, message stored on a Subscriber Identification Module (SIM).
6F 70 64 61 74 61 30 31		opdata01
n/a		1Password 4 Cloud Keychain encrypted data
72 65 67 66		regf
DAT		Windows NT registry hive file
72 69 66 66		riff
ACD		Sonic Foundry Acid Music File (Sony)
72 74 73 70 3A 2F 2F		rtsp://
RAM		RealMedia metafile
73 6C 68 21 or		slh!
DAT		Allegro Generic Packfile Data file (compressed)
73 6C 68 2E		slh.
DAT		Allegro Generic Packfile Data file (uncompressed)
73 6D 5F		sm_
PDB		PalmOS SuperMemo file
73 6F 6C 69 64		solid
STL		ASCII STL (STereoLithography) file for 3D printing.
73 72 63 64 6F 63 69 64 3A		srcdocid :
CAL		CALS raster bitmap file
73 7A 65 7A		szez
PDB		PowerBASIC Debugger Symbols file
[60 (0x3C) byte offset] 74 42 4D 50 4B 6E 57 72		[60 (0x3C) byte offset] tBMPKnWr
PRC		PathWay Map file, used with GPS devices
74 72 75 65 00		true.
TTF		TrueType font file
[257 (0x101) byte offset] 75 73 74 61 72		[257 (0x101) byte offset] ustar
TAR		Tape Archive file (http://www.mkssoftware.com/docs/man4/tar.4.asp)
76 2F 31 01		v/1.
EXR		OpenEXR bitmap image format
76 32 30 30 33 2E 31 30 0D 0A 30 0D 0A		v2003.10 ..0..
FLT		Qimage filter
77 4F 46 32		wOF2
WOFF2		Web Open Font Format 2
77 4F 46 46		wOFF
WOFF		Web Open Font Format
78 01 73 0D 62 62 60		x.s.bb`
DMG		Mac OS X Disk Copy Disk Image file
78 61 72 21		xar!
XAR		eXtensible ARchive file
7A 62 65 78		zbex
INFO		ZoomBrowser Image Index file (ZbThumbnal.info)
7B 0D 0A 6F 20		{..o
LGC, LGD		Windows application log
7B 22 75 72 6C 22 3A 20 22 68 74 74 70 73 3A 2F		{"url": "https:/
GDOC		Google Drive Document link
GDRAW		Google Drive Drawing link
7B 5C 70 77 69		{\pwi
PWI		Microsoft Windows Mobile personal note file
7B 5C 72 74 66		{\rtf
RTF		Rich text format word processing file Trailer: 7D (})
7C 4B C3 74 E1 C8 53 A4 79 B9 01 1D FC 4F DD 13		|KÃtáÈS¤ y¹..üOÝ.
CSD		Huskygram, Poem, or Singer embroidery design file
7E 42 4B 00		~BK.
PSP		Corel Paint Shop Pro image file
7E 45 53 44 77 F6 85 3E BF 6A D2 11 45 61 73 79 20 53 74 72 65 65 74 20 44 72 61 77		~ESDwö…> ¿jÒ.Easy  Street Draw
ESD		Easy Street Draw diagram file
7E 74 2C 01 50 70 02 4D 52 01 00 00 00 08 00 00 00 01 00 00 31 00 00 00 31 00 00 00 43 01 FF 00 01 00 08 00 01 00 00 00 7e 74 2c 01		~t,.Pp.M R....... ....1... 1...C.ÿ. ........ ~t,.
IMG		Reportedly a proprietary recording system, possibly a Digital Watchdog DW-TP-500G unit.
7F 45 4C 46		.ELF
n/a		Executable and Linking Format executable file (Linux/Unix)
80		.
OBJ		Relocatable object code
80 00		..
ADX		ADX lossy compressed audio file
80 2A 5F D7		.*_.
CIN		Kodak Cineon image file
81 32 84 C1 85 05 D0 11 B2 90 00 AA 00 3C F6 76		.2„Á….Ð. ²..ª.<öv
WAB		Outlook Express address book (Win95)
81 CD AB		.Í«
WPF		WordPerfect text file
86 DD 6x		†Ý{lower_case letter}
n/a		Possibly, maybe, might be a fragment of an Ethernet frame carrying an IPv6 packet. See Hints About Looking for Network Packet Fragments.
89 50 4E 47 0D 0A 1A 0A		‰PNG....
PNG		Portable Network Graphics file Trailer: 49 45 4E 44 AE 42 60 82 (IEND®B`‚...)
8A 01 09 00 00 00 E1 08 00 00 99 19		Š.....á. ..™.
AW		MS Answer Wizard file
91 33 48 46		‘3HF
HAP		Hamarsoft HAP 3.x compressed archive
95 00 or		•.
95 01		•.
SKR		PGP secret keyring file
97 4A 42 32 0D 0A 1A 0A		—JB2....
JB2		JBIG2 image file Trailer: 03 33 00 01 00 00 00 00 (.3......)
99		™
GPG		GNU Privacy Guard (GPG) public keyring
99 01		™.
PKR		PGP public keyring file
9C CB CB 8D 13 75 D2 11 91 58 00 C0 4F 79 56 A4		œËË..UÒ. ‘X.ÀOyV¤
WAB		Outlook address file
[512 (0x200) byte offset] A0 46 1D F0		[512 (0x200) byte offset]  F.ð
PPT		PowerPoint presentation subheader (MS Office)
A1 B2 C3 D4		¡²ÃÔ
n/a		tcpdump (libpcap) capture file (Linux/Unix)
A1 B2 CD 34		¡²Í4
n/a		Extended tcpdump (libpcap) capture file (Linux/Unix)
A9 0D 00 00 00 00 00 00		©.......
DAT		Access Data FTK evidence file
AB 4B 54 58 20 31 31 BB 0D 0A 1A 0A		«KTX 11» ....
KTX		Khronos texture file for OpenGL and OpenGL ES applications
AC 9E BD 8F 00 00		¬.½...
QDF		Quicken data file
AC ED		’
n/a		Java serialization data (see Object Serialization Stream Protocol)
AC ED 00 05 73 72 00 12 62 67 62 6C 69 74 7A 2E		’..sr.. bgblitz.
PDB		BGBlitz (professional Backgammon software) position database file
B0 4D 46 43		°MFC
PWL		Windows 95 password file
B1 68 DE 3A		±hÞ:
DCX		Graphics Multipage PCX bitmap file
B4 6E 68 44		´nhd
TIB		Acronis True Image file (early versions)
B5 A2 B0 B3 B3 B0 A5 B5		µ¢°³³°¥µ
CAL		Windows calendar file
B8 C9 0C 00		¸É..
INS		InstallShield Script
BE 00 00 00 AB 00 00 00 00 00 00 00 00		¾...«... ....
WRI		MS Write file
BE BA FE CA 0F 50 61 6C 6D 53 47 20 44 61 74 61		¾ºþÊ.Pal mSG Data
DAT		Palm Desktop DateBook file
C3 AB CD AB		ëͫ
ACS		MS Agent Character file
C5 D0 D3 C6		ÅÐÓÆ
EPS		Adobe encapsulated PostScript file
C8 00 79 00		È.y.
LBK		Jeppesen FliteLog file
CA FE BA BE		Êþº¾
CLASS		Java bytecode file (also used by Apple iOS apps)
CC 52 33 FC E9 2C 18 48 AF E3 36 30 1A 39 40 06		ÌR3üé,.H ¯ã60.9@.
NBU		Nokia phone backup file
CD 20 AA AA 02 00 00 00		Í ªª....
n/a		Norton Anti-Virus quarantined virus file
CE 24 B9 A2 20 00 00 00		Î$¹¢ ...
TIB		Acronis True Image file (current versions)
CE CE CE CE		ÎÎÎÎ
JCEKS		Java Cryptography Extension keystore file
CE FA ED FE		Îúíþ
n/a		Apple OS X ABI Mach-O binary file (32-bit, where target system has reverse byte ordering from host running compiler)
CF 11 E0 A1 B1 1A E1 00		Ï.ࡱ.á.
DOC		Perfect Office document [Note similarity to MS Office header, below]
CF AD 12 FE		Ï­.þ
DBX		Outlook Express e-mail folder
CF FA ED FE		Ïúíþ
n/a		Apple OS X ABI Mach-O binary file (64-bit, where target system has reverse byte ordering from host running compiler)
D0 CF 11 E0 A1 B1 1A E1		ÐÏ.ࡱ.á
DOC, DOT, PPS, PPT, XLA, XLS, WIZ		An Object Linking and Embedding (OLE) Compound File (CF) (i.e., OLECF) file format, known as Compound Binary File format by Microsoft, used by Microsoft Office 97-2003 applications (Word, Powerpoint, Excel, Wizard). Part of Microsoft's Structured Storage (MSS) architecture for Component Object Model (COM)-based operating systems. [See also Excel, Outlook, PowerPoint, and Word "subheaders" at byte offset 512 (0x200).] There appear to several subheader formats and a dearth of documentation. There have been reports that there are different subheaders for Windows and Mac versions of MS Office but I cannot confirm that.] Password-protected DOCX, XLSX, and PPTX files also use this signature those files are saved as OLECF files. [Note the similarity between D0 CF 11 E0 and the word "DOCFILE"!]
AC_		CaseWare Working Papers compressed client file
ADP		Access project file
APR		Lotus/IBM Approach 97 file
DB		MSWorks database file
MSC		Microsoft Common Console Document
MSG		Microsoft Outlook/Exchange Message
MSI		Microsoft Installer package
MSP		Windows Installer Patch
MTW		Minitab data file
MXD		ArcMap GIS project file
OPT		Developer Studio File Workspace Options file
PUB		MS Publisher file
QBM		QuickBooks Portable Company File
RVT		Revit Project file
SOU		Visual Studio Solution User Options file
SPO		SPSS output file
VSD		Visio file
WPS		MSWorks text document
D2 0A 00 00		Ò...
FTR		GN Nettest WinPharoah filter file
D4 2A		Ô*
ARL, AUT		AOL history (ARL) and typed URL (AUT) files
D4 C3 B2 A1		Ôò¡
n/a		WinDump (winpcap) capture file (Windows)
D7 CD C6 9A		×ÍÆš
WMF		Windows graphics metafile
DB A5 2D 00		Û¥-.
DOC		Word 2.0 file
DC DC		ÜÜ
CPL		Corel color palette file
DC FE		Üþ
EFX		eFax file format
E3 10 00 01 00 00 00 00		ã.......
INFO		Amiga Icon file
E3 82 85 96		ã‚…–
PWL		Windows 98 password file
E4 52 5C 7B 8C D8 A7 4D AE B1 53 78 D0 29 96 D3		äR\{ŒØ§M ®±SxÐ)–Ó
ONE		Microsoft OneNote note
E8 or		è
E9 or		é
EB		ë
COM, SYS		Windows executable file
EB 3C 90 2A		ë<.*
IMG		GEM Raster file
EB 52 90 2D 46 56 45 2D 46 53 2D		ëR.-FVE- FS-
n/a		Header of boot sector in BitLocker protected volume (Vista)
EB 58 90 2D 46 56 45 2D 46 53 2D		ëX.-FVE- FS-
n/a		Header of boot sector in BitLocker protected volume (Windows 7)
[512 (0x200) byte offset] EC A5 C1 00		[512 (0x200) byte offset] ì¥Á.
DOC		Word document subheader (MS Office)
ED AB EE DB		í«îÛ
RPM		RedHat Package Manager file
EF BB BF		
n/a		Byte-order mark (BOM) for 8-bit Unicode Transformation Format (UTF-8) files. (See the Unicode Home Page.)
EF BB BF 3C		<
WSF		Windows Script Component (UTF-8)
EF BB BF 3C 3F		<?
WSC		Windows Script Component (UTF-8)
EF BB BF 3C 3F 78 6D 6C 20 76 65 72 73 69 6F 6E		<?xml  version
YTT		YouTube Timed Text (subtitle) file
[At a cluster boundary] F0 FF FF		[At a cluster boundary] ðÿÿ
n/a		FAT12 File Allocation Table
[At a cluster boundary] F8 FF FF FF		[At a cluster boundary] øÿÿÿ
n/a		FAT16 File Allocation Table
[At a cluster boundary] F8 FF FF 0F FF FF FF 0F		[At a cluster boundary] øÿÿ.ÿÿÿ.
n/a		FAT32 File Allocation Table
[At a cluster boundary] F8 FF FF 0F FF FF FF FF		[At a cluster boundary] øÿÿ.ÿÿÿÿ
n/a		FAT32 File Allocation Table
F9 BE B4 D9		ù¾´Ù
DAT		Bitcoin-Qt blockchain block file
FD 37 7A 58 5A 00		ý7zXZ.
XZ		XZ archive file
[512 (0x200) byte offset] FD FF FF FF 02		[512 (0x200) byte offset] ýÿÿÿ.
PUB		MS Publisher file subheader
[512 (0x200) byte offset] FD FF FF FF 04		[512 (0x200) byte offset] ýÿÿÿ.
MSG		Microsoft Outlook/Exchange Message
QBM		QuickBooks Portable Company File
SUO		Visual Studio Solution User Options subheader (MS Office)
[512 (0x200) byte offset] FD FF FF FF nn nn 00 00		[512 (0x200) byte offset] ýÿÿÿ....
PPT		PowerPoint presentation subheader (MS Office)
[512 (0x200) byte offset] FD FF FF FF nn 00		[512 (0x200) byte offset] ýÿÿÿ..
or
[512 (0x200) byte offset] FD FF FF FF nn 02		[512 (0x200) byte offset] ýÿÿÿ..
XLS		Excel spreadsheet subheader (MS Office)
[512 (0x200) byte offset] FD FF FF FF 20 00 00 00		[512 (0x200) byte offset] ýÿÿÿ ...
OPT		Developer Studio File Workspace Options subheader (MS Office)
XLS		Excel spreadsheet subheader (MS Office)
[512 (0x200) byte offset] FD FF FF FF xx xx xx xx xx xx xx xx 04 00 00 00		[512 (0x200) byte offset] ýÿÿÿ.... ........
DB		Thumbs.db subheader (MS Office)
FE ED FA CE		þíúÎ
n/a		Apple OS X ABI Mach-O binary file (32-bit)
FE ED FA CF		þíúÏ
n/a		Apple OS X ABI Mach-O binary file (64-bit)
FE ED FE ED		þíþí
JKS		JavaKeyStore file
FE EF		þï
GHO, GHS		Symantex Ghost image file
FE FF		þÿ
n/a		Byte-order mark (BOM) for 16-bit Unicode Transformation Format/ 2-octet Universal Character Set (UTF-16/UCS-2), big-endian files. (See the Unicode Home Page.)
FF		ÿ
SYS		Windows executable (SYS) file
FF 00 02 00 04 04 05 54 02 00		ÿ......T ..
WKS		Works for Windows spreadsheet file
FF 0A 00		ÿ..
QRP		QuickReport Report file
FF 46 4F 4E 54		ÿFONT
CPI		Windows international code page
FF 4B 45 59 42 20 20 20		ÿKEYB
SYS		Keyboard driver file
FF 57 50 43		ÿWPC
WP, WPD, WPG, WPP, WP5, WP6		WordPerfect text and graphics file
FF D8		ÿØ
JPE, JPEG, JPG		Generic JPEG Image file Trailer: FF D9 (ÿÙ)
NOTES on JPEG file headers: The proper JPEG header is the two-byte sequence, 0xFF-D8, aka Start of Image (SOI) marker. JPEG files end with the two-byte sequence, 0xFF-D9, aka End of Image (EOI) marker. Between the SOI and EOI, JPEG files are composed of segments. Segments start with a two-byte Segment Tag followed by a two-byte Segment Length field and then a zero-terminated string identifier (i.e., a character string followed by a 0x00), as shown below with the JFIF, Exif, and SPIFF segments. Segment Tags of the form 0x-FF-Ex (where x = 0..F) are referred to as APP0-APP15, and contain application-specific information. The most commonly seen APP segments at the beginning of a JPEG file are APP0 and APP1 although others are also seen. Some additional tags are shown below: 0xFF-D8-FF-E0 — Standard JPEG/JFIF file, as shown below. 0xFF-D8-FF-E1 — Standard JPEG file with Exif metadata, as shown below. 0xFF-D8-FF-E2 — Canon Camera Image File Format (CIFF) JPEG file (formerly used by some EOS and Powershot cameras). 0xFF-D8-FF-E8 — Still Picture Interchange File Format (SPIFF), as shown below.
FF D8 FF E0 xx xx 4A 46 49 46 00		ÿØÿà..JF IF.
JFIF, JPE, JPEG, JPG		JPEG/JFIF graphics file Trailer: FF D9 (ÿÙ)
FF D8 FF E1 xx xx 45 78 69 66 00		ÿØÿá..Ex if.
JPG		Digital camera JPG using Exchangeable Image File Format (EXIF) Trailer: FF D9 (ÿÙ) See "Using Extended File Information (EXIF) File Headers in Digital Evidence Analysis" (P. Alvarez, IJDE, 2(3), Winter 2004) and ExifTool Tag Names
FF D8 FF E8 xx xx 53 50 49 46 46 00		ÿØÿè..SP IFF.
JPG		Still Picture Interchange File Format (SPIFF) Trailer: FF D9 (ÿÙ)
FF Ex		ÿ.
FF Fx		ÿ.
MPEG, MPG, MP3		MPEG audio file frame synch pattern
FF F1		ÿñ
AAC		MPEG-4 Advanced Audio Coding (AAC) Low Complexity (LC) audio file
FF F9		ÿù
AAC		MPEG-2 Advanced Audio Coding (AAC) Low Complexity (LC) audio file
FF FE		ÿþ
REG		Windows Registry file
n/a		Byte-order mark (BOM) for 16-bit Unicode Transformation Format/ 2-octet Universal Character Set (UTF-16/UCS-2), little-endian files. (See the Unicode Home Page.)
FF FE 00 00		ÿþ..
n/a		Byte-order mark for 32-bit Unicode Transformation Format/ 4-octet Universal Character Set (UTF-32/UCS-4), little-endian files. (See the Unicode Home Page.)
FF FE 23 00 6C 00 69 00 6E 00 65 00 20 00 31 00		ÿþ#.l.i. n.e. .1.
MOF		Windows MSinfo file
FF FF FF FF		ÿÿÿÿ
SYS		DOS system driver

---

ACKNOWLEDGEMENTS

The following individuals have given me updates or suggestions for this list over the years: Devon Ackerman, Nazim Aliyev, Marco Barbieri, Vladimir Benko, Arvin Bhatnagar, Jim Blackson, Keith Blackwell, Alex Boschma, Sam Brothers, David Burton, Alex Caithness, Erik Campeau, Björn Carlin, Tim Carver, Michael D Cavalier, Per Christensson, Oscar Choi, JMJ.Conseil, Jesse Cooper, Jesse Corwin, Mike Daniels, David DeBrota, Cornelis de Groot, Jeffrey Duggan, Tony Duncan, Jon Eldridge, Ehsan Elhampour, Jean-Pierre Fiset, Peter Almer Frederiksen, Tim Gardner, Chris Griffith, Linda Grody, Andis Grosšteins, Paulo Guzmán, Rich Hanes, George Harpur, Brian High, Eric Huber, John Hughes, Allan Jensen, Broadus Jones, Matthew Kelly, Axel Kesseler, Nick Khor, Shane King, Art Kocsis, Thiemo Kreuz, Bill Kuhns, Evgenii Kustov, Andreas Kyrmegalos, Glenn Larsson, Jeremy Lloyd, Anand Mani, Kevin Mansell, Davyd McColl, Par Osterberg Medina, Michal, Sergey Miklin, David Millard, Bruce Modick, Lee Nelson, Mart Oskamp, Dan P., Jorge Paulhiac, Carlo Politi, Seth Polley, Hedley Quintana, Anthony Rabon, Stanley Rainey, Cory Redfern, Bruce Robertson, Ben Roeder, Thomas Rösner, Gerd, Röthig, Gaurav Sehgal, Andy Seitz, Anli Shundi, Erik Siers, Philip Smith, Mike Sutton, Matthias Sweertvaegher, Tobiasz Światlowski, Frank Thornton, Erik van de Burgwal, Øyvind Walding, Jason Wallace, Daniel Walton, Franklin Webber, Bernd Wechner, Douglas White, Mike Wilkinson, Gavin Williams, Sean Wolfinger, David Wright, Yuna, and Shaul Zevin. I thank them and apologize if I have missed anyone.

I would like to give particular thanks to Danny Mares of Mares and Company, author of the MaresWare Suite (primarily for the "subheaders" for many of the file types here), and the people at X-Ways Forensics for their permission to incorporate their lists of file signatures.

Finally, Dr. Nicole Beebe from The University of Texas at San Antonio posted samples of more than 32 file types at the Digital Corpora, which I used for verification and additional signatures. These files were used to develop the Sceadan File Type Classifier. The file samples can be downloaded from the Digital Corpora website.

COPYRIGHT NOTICE

All information on this page © 2002-, Gary C. Kessler. Permission to use the material here is extended to any of this page's visitors, as long as appropriate attribution is provided and the information is not altered in any way without express written permission of the author.