commonWP is a WordPress plugin designed to enhance website performance by utilizing a free public CDN, specifically jsDelivr, for JavaScript and CSS files. It supports files from WordPress core, plugins from the WordPress.org repository, themes, and even GitHub-hosted resources, ensuring a wide range of compatibility. The plugin is lightweight and focuses on security by verifying that remote files are identical to local versions before serving them, which minimizes potential vulnerabilities.

This plugin operates without any settings, automatically caching files in the background once activated. The unique feature of generating a subresource identity hash for remote files adds an extra layer of security, preventing browsers from loading unverified content. Overall, commonWP streamlines the use of CDNs in WordPress, making it a valuable tool for developers looking to optimize their sites.