All File Signatures & Extensions
Search by extension, format name, or MIME type to jump straight to a canonical signature page with validation code and source attribution.
ADXlossy compressed audio file
Primary Hex
03 00 00 00 41 50 50 52
AES Cryptfile format
Primary Hex
41 45 53
AFF
Primary Hex
41 46 46
AFM
Primary Hex
53 74 61 72 74 46 6F 6E 74 4D 65 74 72 69 63 73
Adobe Portable Document Format
Primary Hex
25 50 44 46
Audio Interchange File Format (AIFF)
Primary Hex
46 4F 52 4D
AIFC
Primary Hex
46 4F 52 4D 2E 2E 2E 2E 41 49 46 46
Audio Interchange File Format
Primary Hex
46 4F 52 4D
AIN Compressed Archive
Primary Hex
21 12
AL
Primary Hex
65 76 61 6C 20 22 65 78 65 63 20 2F 75 73 72 2F 6C 6F 63 61 6C 2F 62 69 6E 2F 70 65 72 6C
ALIAS
Primary Hex
62 6F 6F 6B 00 00 00 00
AMFM
Primary Hex
53 74 61 72 74 46 6F 6E 74 4D 65 74 72 69 63 73
Adaptive Multi-Rate ACELP
Primary Hex
23 21 41 4D 52
ANBM
Primary Hex
46 4F 52 4D
Windows animated cursor
Primary Hex
52 49 46 46
ANIM
Primary Hex
46 4F 52 4D
DeluxePaint Animation file
Primary Hex
46 4F 52 4D
ANPA
Primary Hex
16 16 01
Acrobat plug-in
Primary Hex
4D 5A 90 00 03 00 00 00
Android package
Primary Hex
50 4B 03 04
Lotus/IBM Approach 97 file
Primary Hex
D0 CF 11 E0 A1 B1 1A E1
PufferASCII-armored encrypted archive
Primary Hex
42 65 67 69 6E 20 50 75 66 66 65 72 20 44 61 74 61 0D 0A
AR
Primary Hex
3D 3C 61 72 3E
Internet Archive ARC (web archive)
Primary Hex
66 69 6C 65 64 65 73 63 3A 2F 2F