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Header Byte Identification

Magic Byte Lookup

Paste the first bytes of a file as hex to find matching formats, MIME types, byte offsets, and risk levels. This lookup checks header signatures; trailer-only signatures are documented on their format pages.

Examples: PDF PNG ZIP MP4

Normalized input

89 50 4E 47 0D 0A 1A 0A

8 bytes checked.

Matching Formats

1 candidate matched the supplied bytes. Shared containers can produce multiple results.

.png

Portable Network Graphics file

Safe

image/png

Matched Signature

89 50 4E 47 0D 0A 1A 0A
Offset 0