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.
AES Cryptfile format
N/A
Primary Hex
41 43 53 44
AFF
N/A
Primary Hex
41 46 46
AFM
application/x-font-adobe-metric
Primary Hex
53 74 61 72 74 46 6F 6E 74 4D 65 74 72 69 63 73
Adobe Portable Document Format
N/A
Primary Hex
25 50 44 46
AIF
audio/x-aiff
Primary Hex
46 4F 52 4D 2E 2E 2E 2E 41 49 46 46
AIFC
audio/x-aiff
Primary Hex
46 4F 52 4D 2E 2E 2E 2E 41 49 46 46
Audio Interchange File
audio/x-aiff
Primary Hex
46 4F 52 4D 00
AIN Compressed Archive
N/A
Primary Hex
21 12
AL
text/x-perl
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