git-mergetool [--tool=<tool>] [<file>]…


Use git mergetool to run one of several merge utilities to resolve merge conflicts. It is typically run after linkgit:git-merge[1].

If one or more <file> parameters are given, the merge tool program will be run to resolve differences on each file. If no <file> names are specified, git mergetool will run the merge tool program on every file with merge conflicts.


-t or --tool=<tool>

Use the merge resolution program specified by <tool>. Valid merge tools are: kdiff3, tkdiff, meld, xxdiff, emerge, vimdiff, gvimdiff, ecmerge, and opendiff

If a merge resolution program is not specified, git mergetool will use the configuration variable merge.tool. If the configuration variable merge.tool is not set, git mergetool will pick a suitable default.

You can explicitly provide a full path to the tool by setting the configuration variable mergetool.<tool>.path. For example, you can configure the absolute path to kdiff3 by setting mergetool.kdiff3.path. Otherwise, git mergetool assumes the tool is available in PATH.


Written by Theodore Y Ts’o <>


Documentation by Theodore Y Ts’o.


Part of the linkgit:git[7] suite