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.
ORC
N/A
Primary Hex
4F 52 43
ORF
image/x-raw-olympus
Primary Hex
49 49 52 4F
AOL personal file cabinet
N/A
Primary Hex
41 4F 4C 56 4D 31 30 30
Microsoft Outlook Offline Storage Folder File
application/vnd.ms-outlook-pst
Primary Hex
21 42 44 4E 2E 2E 2E 2E 53 4D
OTC
application/vnd.oasis.opendocument.chart-template
Primary Hex
50 4B
OpenType font file
application/x-font-otf
Primary Hex
4F 54 54 4F 00
OTG
application/vnd.oasis.opendocument.graphics-template
Primary Hex
50 4B
OTH
application/vnd.oasis.opendocument.text-web
Primary Hex
50 4B
OTHER
N/A
Primary Hex
3C 3F 78 6D 6C 20