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.
XLC
application/vnd.ms-excel
Primary Hex
4D 69 63 72 6F 73 6F 66 74 20 45 78 63 65 6C 20 35 2E 30 20 57 6F 72 6B 73 68 65 65 74
XLD
application/vnd.ms-excel
Primary Hex
4D 69 63 72 6F 73 6F 66 74 20 45 78 63 65 6C 20 35 2E 30 20 57 6F 72 6B 73 68 65 65 74
XLEX
text/plain
Primary Hex
54 68 69 73 20 69 73 20 54 65 58 2C
XLL
application/vnd.ms-excel
Primary Hex
4D 69 63 72 6F 73 6F 66 74 20 45 78 63 65 6C 20 35 2E 30 20 57 6F 72 6B 73 68 65 65 74
XLM
application/vnd.ms-excel
Primary Hex
4D 69 63 72 6F 73 6F 66 74 20 45 78 63 65 6C 20 35 2E 30 20 57 6F 72 6B 73 68 65 65 74
XLOG
text/plain
Primary Hex
54 68 69 73 20 69 73 20 54 65 58 2C
XLR
application/x-tika-msworks-spreadsheet
Primary Hex
D0 CF 11 E0 A1 B1 1A E1
An Object Linking and Embedding
application/vnd.ms-excel
Primary Hex
D0 CF 11 E0 A1 B1 1A E1
Microsoft Office Open XML Format
N/A
Primary Hex
50 4B 03 04 50 4B 05 06 50 4B 07 08