.PATCH File Extension

Patch File

Developer Matt Mackall
3.9  |  138 Votes

What is a PATCH file?

File created by Mercurial, a control management developer tool; contains the differences between two different versions of the same text or source file; used by developers that are making changes to different versions of the same file; enables updating of older text files to newer version text files.

More Information

The "patch" command searches for the line that starts with the string diff -, once it finds that string, it knows that that's the beginning of the patch content.

Mercurial is mostly written in the Python and C languages.

NOTE: Also known as .DIFF files because they were originally created by the diff command.

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Programs that open or reference PATCH files


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