List of file signatures

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This is a list of file signatures, data used to identify or verify the content of a file. Such signatures are also known as magic numbers.

Many binary file formats are not intended to be read as text. If such a file is accidentally viewed as a text file, its contents will be unintelligible. However, sometimes the file signature can be recognizable when interpreted as text. The column ISO 8859-1 shows how the file signature appears when interpreted as text in the common ISO 8859-1 encoding.

File extension Description Offset ISO 8859-1 Hex signature
PIC
PIF
SEA
YTR
IBM Storyboard bitmap file

Windows Program Information File
Mac Stuffit Self-Extracting Archive
IRIS OCR data file

0
.
00
PDB PalmPilot Database/Document File 11
........
........
........
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
DBA Palm Desktop Calendar Archive 0
...
BE BA FE CA
DBA Palm Desktop To Do Archive 0
...
00 01 42 44
TDA Palm Desktop Calendar Archive 0
...
00 01 44 54
Palm Desktop Data File (Access format) 0
...
00 01 00 00
ico Computer icon encoded in ICO file format[1] 0
....
00 00 01 00
3gp
3g2
3rd Generation Partnership Project 3GPP and 3GPP2 multimedia files 4
ftyp 3g
66 74 79 70 33 67
z
tar.z
compressed file (often tar zip)

using Lempel-Ziv-Welch algorithm

0
..
1F 9D
z
tar.z
Compressed file (often tar zip)

using LZH algorithm

0
..
1F A0
bac File or tape containing a backup done with AmiBack on an Amiga.

It typically is paired with an index file (idx) with the table of contents.

0
BACKMIKE
DISK
42 41 43 4B 4D 49 4B 45
44 49 53 4B
bz2 Compressed file using Bzip2 algorithm 0
BZh
42 5A 68
gif Image file encoded in the Graphics Interchange Format (GIF)[2] 0
GIF87a
GIF89a
47 49 46 38 37 61
47 49 46 38 39 61
tif
tiff
Tagged Image File Format 0
II*.
MM.*
49 49 2A 00
(little endian format)
4D 4D 00 2A
(big endian format)
cr2 Canon RAW Format Version 2[3]
Canon's RAW format is based on the TIFF file format [4]
0
II*.....
CR
49 49 2A 00 10 00 00 00
43 52
cin Kodak Cineon image 0
.*_.
80 2A 5F D7
dpx SMPTE DPX image 0
SDPX
XPDS
53 44 50 58
(big endian format)
58 50 44 53
(little endian format)
exr OpenEXR image 0
v/1.
76 2F 31 01
bpg Better Portable Graphics format[5] 0
BPGû
42 50 47 FB
jpg
jpeg
JPEG raw or in the JFIF or Exif file format 0
ÿØÿÛ

ÿØÿà ..J
F IF..

ÿØÿá ..E
x if..
FF D8 FF DB

FF D8 FF E0 nn nn 4A 46
49 46 00 01

FF D8 FF E1 nn nn 45 78
69 66 00 00
ilbm
lbm
ibm
iff
IFF Interleaved Bitmap Image 0

any

FORM....
ILBM
46 4F 52 4D nn nn nn nn
49 4C 42 4D
8svx
8sv
svx
snd
iff
IFF 8-Bit Sampled Voice 0

any

FORM....
8SVX
46 4F 52 4D nn nn nn nn
38 53 56 58
acbm
iff
Amiga Contiguous Bitmap 0

any

FORM....
ACBM
46 4F 52 4D nn nn nn nn
41 43 42 4D
anbm
iff
IFF Animated Bitmap 0

any

FORM....
ANBM
46 4F 52 4D nn nn nn nn
41 4E 42 4D
anim
iff
IFF CEL Animation 0

any

FORM....
ANIM
46 4F 52 4D nn nn nn nn 
41 4E 49 4D
faxx
fax
iff
IFF Facsimile Image 0

any

FORM....
FAXX
46 4F 52 4D nn nn nn nn
46 41 58 58
ftxt
txt
iff
IFF Formatted Text 0

any

FORM....
FTXT
46 4F 52 4D nn nn nn nn
46 54 58 54
smus
smu
mus
iff
IFF Simple Musical Score 0

any

FORM....
SMUS
46 4F 52 4D nn nn nn nn
53 4D 55 53
cmus
mus
iff
IFF Musical Score 0

any

FORM....
CMUS
46 4F 52 4D nn nn nn nn
43 4D 55 53
yuvn
yuv
iff
IFF YUV Image 0

any

FORM....
YUVN
46 4F 52 4D nn nn nn nn
59 55 56 4E
iff Amiga Fantavision Movie 0

any

FORM....
FANT
46 4F 52 4D nn nn nn nn
46 41 4E 54
aiff
aif
aifc
snd
iff
Audio Interchange File Format 0

any

FORM....
AIFF
46 4F 52 4D nn nn nn nn
41 49 46 46
idx Index file to a file or tape containing a backup done with AmiBack on an Amiga. 0
INDX
49 4E 44 58
lz lzip compressed file 0
LZIP
4C 5A 49 50
exe DOS MZ executable file format and its descendants (including NE and PE) 0
MZ
4D 5A
zip
jar
odt
ods
odp
docx
xlsx
pptx
vsdx
apk
zip file format and formats based on it, such as JAR, ODF, OOXML 0
PK..
50 4B 03 04

50 4B 05 06
(empty archive)
50 4B 07 08
(spanned archive)
rar RAR archive version 1.50 onwards[6] 0
Rar!...

52 61 72 21 1A 07 00
rar RAR archive version 5.0 onwards[7] 0
Rar!....
52 61 72 21 1A 07 01 00
Executable and Linkable Format 0
.ELF
7F 45 4C 46
png Image encoded in the Portable Network Graphics format[8] 0
.PNG....
89 50 4E 47 0D 0A 1A 0A
class Java class file, Mach-O Fat Binary 0
Êþº¾
CA FE BA BE
UTF-8 encoded Unicode byte order mark, commonly seen in text files. 0

EF BB BF
Mach-O binary (32-bit) 0

0x1000

........
FE ED FA CE
Mach-O binary (64-bit) 0

0x1000

........
FE ED FA CF
Mach-O binary (reverse byte ordering scheme, 32-bit)[9] 0
........
CE FA ED FE
Mach-O binary (reverse byte ordering scheme, 64-bit)[9] 0
........
CF FA ED FE
Byte-order mark for text file encoded in little-endian 16-bit Unicode Transfer Format 0
..
FF FE
Byte-order mark for text file encoded in little-endian 32-bit Unicode Transfer Format 0
....
FF FE 00 00
ps PostScript document 0
%!PS
25 21 50 53
pdf PDF document 0
%PDF
25 50 44 46
asf
wma
wmv
Advanced Systems Format[10] 0
0&²u.fÏ
.¦Ù.ª.bÎl
30 26 B2 75 8E 66 CF 11
A6 D9 00 AA 00 62 CE 6C
System Deployment Image, a disk image format used by Microsoft 0
$SDI0001
24 53 44 49 30 30 30 31
ogg
oga
ogv
Ogg, an open source media container format 0
OggS
4F 67 67 53
psd Photoshop Document file, Adobe Photoshop's native file format 0
8BPS
38 42 50 53
wav Waveform Audio File Format 0
RIFF....
WAVE
52 49 46 46 nn nn nn nn
57 41 56 45
avi Audio Video Interleave video format 0
RIFF....
AVI.
52 49 46 46 nn nn nn nn 
41 56 49 20
mp3 MPEG-1 Layer 3 file without an ID3 tag or with an ID3v1 tag (which's appended at the end of the file) 0
˙ű
FF FB
mp3 MP3 file with an ID3v2 container 0
ID3
49 44 33
bmp
dib
BMP file, a bitmap format used mostly in the Windows world 0
BM
42 4D
iso ISO9660 CD/DVD image file[11] 0x8001

0x8801
0x9001

CD001
43 44 30 30 31
fits Flexible Image Transport System (FITS)[12] 0
SIMPLE  
=       
        
     T
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
flac Free Lossless Audio Codec[13] 0
fLaC
66 4C 61 43
mid
midi
MIDI sound file[14] 0
MThd
4D 54 68 64
doc
xls
ppt
msg
and other
Compound File Binary Format, a container format used for document by older versions of Microsoft Office.[15] It is however an open format used by other programs as well.
D0 CF 11 E0 A1 B1 1A E1
dex Dalvik Executable 0
dex.035.
64 65 78 0A 30 33 35 00
vmdk VMDK files [16][17] 0
KDM
4B 44 4D
crx Google Chrome extension[18] or packaged app[19] 0
Cr24
43 72 32 34
fh8 FreeHand 8 document[20][21][22] 0
AGD3
41 47 44 33
cwk AppleWorks 5 document 0
....BOBO
........
....
05 07 00 00 42 4F 42 4F
05 07 00 00 00 00 00 00
00 00 00 00 00 01
cwk AppleWorks 6 document 0
....BOBO
........
....
06 07 E1 00 42 4F 42 4F
06 07 E1 00 00 00 00 00
00 00 00 00 00 01
toast Roxio Toast disc image file, also some .dmg-files begin with same bytes 0
ER....
ãER....
45 52 02 00 00 00
8B 45 52 02 00 00 00
dmg Apple Disk Image file 0
x.s.bb`
78 01 73 0D 62 62 60
xar eXtensible ARchive format[23] 0
xar!
78 61 72 21
dat Windows Files And Settings Transfer Repository[24]

See also USMT 3.0 (Win XP)[25] and USMT 4.0 (Win 7)[26] User Guides

0
PMOCCMOC
50 4D 4F 43 43 4D 4F 43
nes Nintendo Entertainment System ROM file [27] 0
NES
4E 45 53 1A
tar tar archive[28] 0x101
ustar.00
ustar  .
75 73 74 61 72 00 30 30
75 73 74 61 72 20 20 00
tox Open source portable voxel file [29] 0
TOX
74 6F 78 33
MLV Magic Lantern Video file[30] 0
MLVI
4D 4C 56 49
Windows Update Binary Delta Compression[31] 0
DCM PA30
44 43 4D 01 50 41 33 30
7z 7-Zip File Format 0
7z¼¯'
37 7A BC AF 27 1C
gz
tar.gz
GZIP 0
..
1F 8B
lz4 LZ4 Streaming Format[32]

Remark: LZ4 compressed data (file) format does not offer any magic bytes.[33]

0
."M.
04 22 4D 18
cab Microsoft Cabinet file 0
MSCF
4D 53 43 46
flif Free Lossless Image Format 0
FLIF
46 4C 49 46
mkv
mka
mks
mk3d
webm
Matroska media container, including WebM 0
.Eߣ
1A 45 DF A3
stg "SEAN : Session Analysis" Training file. Also used in compatible software "Rpw : Rowperfect for Windows" and "RP3W : ROWPERFECT3 for Windows". 0
MIL 
4D 49 4C 20
djvu
djv
DjVu document
The following byte is either 55 (U) for single-page or 4D (M) for multi-page documents.
0
AT&TFORM....DJV
41 54 26 54 46 4F 52 4D nn nn nn nn 44 4A 56
der DER encoded X.509 certificate 0
0.
30 82
File extension Description Offset ISO 8859-1 Hex signature

See also[edit]

References[edit]

  1. ^ Icons (at MSDN)
  2. ^ GRAPHICS INTERCHANGE FORMAT(sm) Version 89a
  3. ^ Computer Knowledge. "File Extension .CR2 Details". filext.com. 
  4. ^ "Inside the Canon RAW format version 2, understanding .CR2 file format and files produced by Canon EOS Digital Camera". free.fr. 
  5. ^ Bellard, Fabrice (2015). "BPG Image format". 
  6. ^ "TechNote.txt: RAR version 4.00 - Technical information". 2010-12-01. The marker block is actually considered as a fixed byte sequence: 0x52 0x61 0x72 0x21 0x1a 0x07 0x00 
  7. ^ "RAR 5.0 archive format". Retrieved 2013-05-01. 
  8. ^ "RFC 2083 - PNG (Portable Network Graphics) Specification Version 1.0". ietf.org. 
  9. ^ a b "Mac Developer Library". apple.com. 
  10. ^ "ASF (Advanced Systems Format)". 
  11. ^ Gary C. Kessler (21 October 2012). "File Signatures Table". Retrieved 28 December 2012. 
  12. ^ "Flexible Image Transport System (FITS), Version 3.0 - File type signifiers". 2012-09-26. Retrieved 24 January 2013. 
  13. ^ Josh Coalson. "FLAC — format". Retrieved 4 April 2013. "fLaC", the FLAC stream marker in ASCII, meaning byte 0 of the stream is 0x66, followed by 0x4C 0x61 0x43 
  14. ^ "File Signature Database: mid File Signatures". filesignatures.net. 
  15. ^ "Developing a tool to recognise MS Office file types ( .doc, .xls, .mdb, .ppt )". social.msdn.microsoft.com. 
  16. ^ "What Files Make Up a Virtual Machine?". vmware.com. 
  17. ^ http://www.vmware.com/app/vmdk/?src=vmdk
  18. ^ "CRX Package Format". chrome.com. 
  19. ^ "CRX Package Format". chrome.com. 
  20. ^ "[Pythonmac-SIG] Discovering file type". python.org. 
  21. ^ Tim Fisher. "FH8 File - What It Is & How To Open One". About.com Tech. 
  22. ^ "Google Groups". google.com. 
  23. ^ "xar - xarformat.wiki". code.google.com. 
  24. ^ "Easily Restore Your Computer With File and Settings Transfer Wizard XP (Part 1)". howtogeek.com. 
  25. ^ "User State Migration Tool 3.0". microsoft.com. Microsoft. 
  26. ^ "User State Migration Tool 4.0 User's Guide". microsoft.com. Microsoft. 
  27. ^ "NESRomTool::NES ROM Quickstart". sadistech.com. 
  28. ^ "GNU tar 1.28: Basic Tar Format". gnu.org. 
  29. ^ "UVOX Universal Voxel Translator - Man Page". tox.land. 
  30. ^ "RAW Format v2.0 - Google Sheets". google.com. 
  31. ^ "Using Binary Delta Compression (BDC) Technology to Update Windows Operating Systems". Microsoft. 10 June 2005. Retrieved 15 March 2015. 
  32. ^ "LZ4 Streaming format". gw.com. 
  33. ^ Yann Collet. "RealTime Data Compression". fastcompression.blogspot.de. 

External links[edit]