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<body class="manpage">
<div id="header">
<h1>git-difftool(1) Manual Page</h1>
<h2 id="_name">NAME</h2>
<div class="sectionbody">
<p>git-difftool - Show changes using common diff tools</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="verseblock">
<pre class="content"><em>git difftool</em> [<options>] [<commit> [<commit>]] [--] [<path>…​]</pre>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph">
<p><em>git difftool</em> is a Git command that allows you to compare and edit files
between revisions using common diff tools. <em>git difftool</em> is a frontend
to <em>git diff</em> and accepts the same options and arguments. See
<a href="git-diff.html">git-diff(1)</a>.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist">
<dl>
<dt class="hdlist1">-d</dt>
<dt class="hdlist1">--dir-diff</dt>
<dd>
<p>Copy the modified files to a temporary location and perform
a directory diff on them. This mode never prompts before
launching the diff tool.</p>
</dd>
<dt class="hdlist1">-y</dt>
<dt class="hdlist1">--no-prompt</dt>
<dd>
<p>Do not prompt before launching a diff tool.</p>
</dd>
<dt class="hdlist1">--prompt</dt>
<dd>
<p>Prompt before each invocation of the diff tool.
This is the default behaviour; the option is provided to
override any configuration settings.</p>
</dd>
<dt class="hdlist1">--rotate-to=<file></dt>
<dd>
<p>Start showing the diff for the given path,
the paths before it will move to the end and output.</p>
</dd>
<dt class="hdlist1">--skip-to=<file></dt>
<dd>
<p>Start showing the diff for the given path, skipping all
the paths before it.</p>
</dd>
<dt class="hdlist1">-t <tool></dt>
<dt class="hdlist1">--tool=<tool></dt>
<dd>
<p>Use the diff tool specified by <tool>. Valid values include
emerge, kompare, meld, and vimdiff. Run <code>git</code> <code>difftool</code> <code>--tool-help</code>
for the list of valid <tool> settings.</p>
<div class="paragraph">
<p>If a diff tool is not specified, <em>git difftool</em>
will use the configuration variable <code>diff.tool</code>. If the
configuration variable <code>diff.tool</code> is not set, <em>git difftool</em>
will pick a suitable default.</p>
</div>
<div class="paragraph">
<p>You can explicitly provide a full path to the tool by setting the
configuration variable <code>difftool.</code><em><tool></em><code>.path</code>. For example, you
can configure the absolute path to kdiff3 by setting
<code>difftool.kdiff3.path</code>. Otherwise, <em>git difftool</em> assumes the
tool is available in PATH.</p>
</div>
<div class="paragraph">
<p>Instead of running one of the known diff tools,
<em>git difftool</em> can be customized to run an alternative program
by specifying the command line to invoke in a configuration
variable <code>difftool.</code><em><tool></em><code>.cmd</code>.</p>
</div>
<div class="paragraph">
<p>When <em>git difftool</em> is invoked with this tool (either through the
<code>-t</code> or <code>--tool</code> option or the <code>diff.tool</code> configuration variable)
the configured command line will be invoked with the following
variables available: <code>$LOCAL</code> is set to the name of the temporary
file containing the contents of the diff pre-image and <code>$REMOTE</code>
is set to the name of the temporary file containing the contents
of the diff post-image. <code>$MERGED</code> is the name of the file which is
being compared. <code>$BASE</code> is provided for compatibility
with custom merge tool commands and has the same value as <code>$MERGED</code>.</p>
</div>
</dd>
<dt class="hdlist1">--tool-help</dt>
<dd>
<p>Print a list of diff tools that may be used with <code>--tool</code>.</p>
</dd>
<dt class="hdlist1">--symlinks</dt>
<dt class="hdlist1">--no-symlinks</dt>
<dd>
<p><em>git difftool</em>'s default behavior is to create symlinks to the
working tree when run in <code>--dir-diff</code> mode and the right-hand
side of the comparison yields the same content as the file in
the working tree.</p>
<div class="paragraph">
<p>Specifying <code>--no-symlinks</code> instructs <em>git difftool</em> to create copies
instead. <code>--no-symlinks</code> is the default on Windows.</p>
</div>
</dd>
<dt class="hdlist1">-x <command></dt>
<dt class="hdlist1">--extcmd=<command></dt>
<dd>
<p>Specify a custom command for viewing diffs.
<em>git-difftool</em> ignores the configured defaults and runs
<em><command></em> <code>$LOCAL</code> <code>$REMOTE</code> when this option is specified.
Additionally, <code>$BASE</code> is set in the environment.</p>
</dd>
<dt class="hdlist1">-g</dt>
<dt class="hdlist1">--gui</dt>
<dt class="hdlist1">--no-gui</dt>
<dd>
<p>When <em>git-difftool</em> is invoked with the <code>-g</code> or <code>--gui</code> option
the default diff tool will be read from the configured
<code>diff.guitool</code> variable instead of <code>diff.tool</code>. This may be
selected automatically using the configuration variable
<code>difftool.guiDefault</code>. The <code>--no-gui</code> option can be used to
override these settings. If <code>diff.guitool</code> is not set, we will
fallback in the order of <code>merge.guitool</code>, <code>diff.tool</code>,
<code>merge.tool</code> until a tool is found.</p>
</dd>
<dt class="hdlist1">--trust-exit-code</dt>
<dt class="hdlist1">--no-trust-exit-code</dt>
<dd>
<p>Errors reported by the diff tool are ignored by default.
Use <code>--trust-exit-code</code> to make <em>git-difftool</em> exit when an
invoked diff tool returns a non-zero exit code.</p>
<div class="paragraph">
<p><em>git-difftool</em> will forward the exit code of the invoked tool when
<code>--trust-exit-code</code> is used.</p>
</div>
</dd>
</dl>
</div>
<div class="paragraph">
<p>See <a href="git-diff.html">git-diff(1)</a> for the full list of supported options.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_configuration">CONFIGURATION</h2>
<div class="sectionbody">
<div class="paragraph">
<p><em>git difftool</em> falls back to <em>git mergetool</em> config variables when the
difftool equivalents have not been defined.</p>
</div>
<div class="paragraph">
<p>Everything above this line in this section isn’t included from the
<a href="git-config.html">git-config(1)</a> documentation. The content that follows is the
same as what’s found there:</p>
</div>
<div class="dlist">
<dl>
<dt class="hdlist1">diff.tool</dt>
<dd>
<p>Controls which diff tool is used by <a href="git-difftool.html">git-difftool(1)</a>.
This variable overrides the value configured in <code>merge.tool</code>.
The list below shows the valid built-in values.
Any other value is treated as a custom diff tool and requires
that a corresponding difftool.<tool>.cmd variable is defined.</p>
</dd>
<dt class="hdlist1">diff.guitool</dt>
<dd>
<p>Controls which diff tool is used by <a href="git-difftool.html">git-difftool(1)</a> when
the -g/--gui flag is specified. This variable overrides the value
configured in <code>merge.guitool</code>. The list below shows the valid
built-in values. Any other value is treated as a custom diff tool
and requires that a corresponding difftool.<guitool>.cmd variable
is defined.</p>
<div class="dlist">
<dl>
<dt class="hdlist1"><code>araxis</code></dt>
<dd>
<p>Use Araxis Merge (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>bc</code></dt>
<dd>
<p>Use Beyond Compare (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>bc3</code></dt>
<dd>
<p>Use Beyond Compare (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>bc4</code></dt>
<dd>
<p>Use Beyond Compare (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>codecompare</code></dt>
<dd>
<p>Use Code Compare (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>deltawalker</code></dt>
<dd>
<p>Use DeltaWalker (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>diffmerge</code></dt>
<dd>
<p>Use DiffMerge (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>diffuse</code></dt>
<dd>
<p>Use Diffuse (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>ecmerge</code></dt>
<dd>
<p>Use ECMerge (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>emerge</code></dt>
<dd>
<p>Use Emacs' Emerge</p>
</dd>
<dt class="hdlist1"><code>examdiff</code></dt>
<dd>
<p>Use ExamDiff Pro (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>guiffy</code></dt>
<dd>
<p>Use Guiffy’s Diff Tool (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>gvimdiff</code></dt>
<dd>
<p>Use gVim (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>kdiff3</code></dt>
<dd>
<p>Use KDiff3 (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>kompare</code></dt>
<dd>
<p>Use Kompare (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>meld</code></dt>
<dd>
<p>Use Meld (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>nvimdiff</code></dt>
<dd>
<p>Use Neovim</p>
</dd>
<dt class="hdlist1"><code>opendiff</code></dt>
<dd>
<p>Use FileMerge (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>p4merge</code></dt>
<dd>
<p>Use HelixCore P4Merge (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>smerge</code></dt>
<dd>
<p>Use Sublime Merge (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>tkdiff</code></dt>
<dd>
<p>Use TkDiff (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>vimdiff</code></dt>
<dd>
<p>Use Vim</p>
</dd>
<dt class="hdlist1"><code>vscode</code></dt>
<dd>
<p>Use Visual Studio Code (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>winmerge</code></dt>
<dd>
<p>Use WinMerge (requires a graphical session)</p>
</dd>
<dt class="hdlist1"><code>xxdiff</code></dt>
<dd>
<p>Use xxdiff (requires a graphical session)</p>
</dd>
</dl>
</div>
</dd>
<dt class="hdlist1">difftool.<tool>.cmd</dt>
<dd>
<p>Specify the command to invoke the specified diff tool.
The specified command is evaluated in shell with the following
variables available: <em>LOCAL</em> is set to the name of the temporary
file containing the contents of the diff pre-image and <em>REMOTE</em>
is set to the name of the temporary file containing the contents
of the diff post-image.</p>
<div class="paragraph">
<p>See the <code>--tool=</code><em><tool></em> option in <a href="git-difftool.html">git-difftool(1)</a> for more details.</p>
</div>
</dd>
<dt class="hdlist1">difftool.<tool>.path</dt>
<dd>
<p>Override the path for the given tool. This is useful in case
your tool is not in the PATH.</p>
</dd>
<dt class="hdlist1">difftool.trustExitCode</dt>
<dd>
<p>Exit difftool if the invoked diff tool returns a non-zero exit status.</p>
<div class="paragraph">
<p>See the <code>--trust-exit-code</code> option in <a href="git-difftool.html">git-difftool(1)</a> for more details.</p>
</div>
</dd>
<dt class="hdlist1">difftool.prompt</dt>
<dd>
<p>Prompt before each invocation of the diff tool.</p>
</dd>
<dt class="hdlist1">difftool.guiDefault</dt>
<dd>
<p>Set <code>true</code> to use the <code>diff.guitool</code> by default (equivalent to specifying
the <code>--gui</code> argument), or <code>auto</code> to select <code>diff.guitool</code> or <code>diff.tool</code>
depending on the presence of a <code>DISPLAY</code> environment variable value. The
default is <code>false</code>, where the <code>--gui</code> argument must be provided
explicitly for the <code>diff.guitool</code> to be used.</p>
</dd>
</dl>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_see_also">SEE ALSO</h2>
<div class="sectionbody">
<div class="dlist">
<dl>
<dt class="hdlist1"><a href="git-diff.html">git-diff(1)</a></dt>
<dd>
<p>Show changes between commits, commit and working tree, etc</p>
</dd>
<dt class="hdlist1"><a href="git-mergetool.html">git-mergetool(1)</a></dt>
<dd>
<p>Run merge conflict resolution tools to resolve merge conflicts</p>
</dd>
<dt class="hdlist1"><a href="git-config.html">git-config(1)</a></dt>
<dd>
<p>Get and set repository or global options</p>
</dd>
</dl>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_git">GIT</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Part of the <a href="git.html">git(1)</a> suite</p>
</div>
</div>
</div>
</div>
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<div id="footer-text">
Last updated 2025-08-25 14:46:08 -0700
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