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Bsdiff 4.0

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A binary source patch file containing differences to be applied to a source binary in order to create a target binary file. As only the delta is stored and BZIP2 compression is used, this format provides an efficient means of applying patches to binary files.

Identify it

Extensions	`.bsdiff`
Signatures	`4253444946463430` at byte 0 (BSDIFF4.0)
PRONOM	`fmt/439`
Wikidata	`Q58367808`

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Sources

From Just Solve the File Format Problem (File Formats Wiki), PRONOM, Wikidata. Updated 2026-10-24.

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