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.
ASICE
application/vnd.etsi.asic-e+zip
Primary Hex
50 4B 03 04
ASICS
application/vnd.etsi.asic-s+zip
Primary Hex
50 4B 03 04
Need for Speed: Underground Audio file
N/A
Primary Hex
53 43 48 6C
1Password 4 Cloud Keychain encrypted attachment
N/A
Primary Hex
4F 50 43 4C 44 41 54
NeXT/Sun Microsystems µ-Law audio file
audio/basic
Primary Hex
2E 73 6E 64
AOL history
N/A
Primary Hex
D4 2A
Resource Interchange File Format --Windows Audio VideoInterleave file
video/x-msvideo
Primary Hex
41 56 49 20
AV1 Image File Format
image/avif
Primary Hex
66 74 79 70 61 76 69 66
AVRO
N/A
Primary Hex
4F 62 6A 01