magicnumbers

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1F 8B

gzip archive

category
file-signature
normalized
1f8b
confirmed
2026-05-10
lookups
1
source
https://www.rfc-editor.org/rfc/rfc1952

File signature of a gzip-compressed file, defined in RFC 1952. The two ID bytes were inherited from earlier compress formats.

Similar magic numbers

valuenamecategory
1F 8B 08 GZIP archive file / VLC Player Skin file file-signature
1F 8B 08 00 Synology router configuration backup file file-signature
1F A0 Compressed tape archive file-signature
1F 9D 90 Compressed tape archive file-signature
-1 Universal error/EOF sentinel sentinel