Speed optimisation for Joomla: CSS, JS and HTML minification, deferred resources and images, preloading of critical files, compression and a page cache for Web Vitals.
JCH Optimize by Samuel Marshall speeds up Joomla pages with a focus on the Web Vitals that PageSpeed Insights reports, such as FCP, LCP and CLS. It applies a number of PageSpeed recommendations automatically, which helps on sites where reworking the template and third-party extensions by hand is not an option.
Features
- Minification of CSS, JavaScript and HTML by stripping extra whitespace and characters.
- Removal of render-blocking resources: critical styles and scripts are inlined, the rest are loaded later.
- Lazy loading for off-screen and hidden images.
- Automatic width and height attributes on images to cut layout shifts.
- Compression of text resources (deflate or brotli) through rules written to .htaccess.
- Preloading of critical resources on HTTP/2 servers.
- A bundled Page Cache plugin that shortens server response time.
Compatibility
- Joomla 4, 5 and 6.
- Current version 9.3.1, last updated in JED on 23 August 2026.
- A paid edition adds more optimisation options and premium support.
