If you’d like to browse the WordPress source and inline documentation, we have a convenient developer reference and a code browser. We also have guides for contributing with Subversion and contributing with Git.
The built WordPress source, licensed under the GNU General Public License version 2 (or later), can be browsed online or checked out locally with Subversion or Git:
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Subversion:
https://core.svn.wordpress.org/ -
Git mirror:
git://core.git.wordpress.org/
WordPress minifies core JavaScript files using UglifyJS and CSS using clean-css, all via the Grunt JavaScript-based task runner. The development source that includes un-minified versions of these files, along with the build scripts, can be browsed online or checked out locally with Subversion or Git:
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Subversion:
https://develop.svn.wordpress.org/ -
Git mirror:
git://develop.git.wordpress.org/
The source code for any program binaries or minified external scripts that are included with WordPress can be freely obtained from our sources repository.