git-difftool

Compare using external tool

$ git difftool [file]

$ git difftool -t [vimdiff] [file]

$ git difftool -y [file]

$ git difftool --staged

$ git difftool [commit1] [commit2]

$ git difftool -d [commit]

git difftool [options] [commit] [--] [files...]

git difftool launches external visual diff tools to review changes in Git repositories. Unlike the built-in git diff which displays changes in the terminal, difftool provides a graphical or enhanced viewing experience through specialized applications.
The command supports a wide variety of diff tools including vimdiff, meld, kdiff3, emerge, opendiff, and many others. Directory diff mode (-d) is particularly useful for graphical tools that support comparing entire directory trees simultaneously.

-t, --tool tool

Use specific diff tool.

Don't prompt before launching.

Directory diff mode.

Compare staged changes.

List available tools.

Custom command.

~/.gitconfig

Global difftool settings including default tool and tool-specific configurations.

Repository-specific difftool configuration overriding global settings.

git-diff(1), git-mergetool(1)