# Source Code

If you’d like to browse the WordPress source and inline documentation, there’s a [convenient developer reference](https://developer.wordpress.org/reference/) and a [code browser](https://core.trac.wordpress.org/browser/). You can also find guides for [contributing with Subversion](https://make.wordpress.org/core/handbook/contribute/svn/) and [contributing with Git](https://make.wordpress.org/core/handbook/contribute/git/).

The built WordPress source, [licensed](/content/about/license/index.html) under the GNU General Public License version 2 (or later), can be [browsed online](https://build.trac.wordpress.org/browser) or checked out locally with Subversion or Git:

- 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](https://gruntjs.com/) JavaScript-based task runner. The development source that includes un-minified versions of these files, along with the build scripts, can be [browsed online](https://core.trac.wordpress.org/browser) or checked out locally with Subversion or Git:

- 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](https://code.trac.wordpress.org/browser/wordpress-sources).