Seraphinite Accelerator (Full)

Slow pages usually come from heavy files, unoptimized scripts and servers that rebuild the same page again and again. This plugin addresses those causes with a file-based cache, revalidation that keeps pages available while content updates, and cached data that is separated by device type and user environment. It also fixes common HTML markup problems such as misplaced tags and unescaped scripts.

On the content side, it minifies JavaScript, CSS and HTML, and it can lazy load, inline or defer scripts and styles. Images, videos, frames and fonts can be lazy loaded too. Most sites need few manual changes after setup. It suits blogs, online stores and course sites, since user-specific caching handles dynamic pages like shopping carts. It also works with many third-party optimization plugins.

Features

• File cache engine: Serves pages from a file-based cache, with cache revalidation designed to keep server resource use low when traffic is heavy.
• Lazy revalidation: Cached pages stay available to visitors while content is being updated, so page delivery is not interrupted during changes.
• Multiple CDN support: Balances content delivery across several CDNs at once, which can also reduce bandwidth use on your own server.
• Wide encoding options: Supports GZip, Deflate, Compress, Brotli and uncompressed formats, so data transfer can match what your server and visitors need.
• User-specific caching: Caches pages for individual users, which helps with dynamic content such as shopping carts and online courses.
• Device-specific caching: Separates cached data by device type and user environment, so each visitor receives content suited to their setup.
• Minification and script loading: Minifies JavaScript, CSS and HTML, and supports lazy loading, inlining and deferring of scripts and styles to reduce payload sizes.
• Media lazy loading: Delays loading of images, videos, frames and fonts until they are needed, which reduces the work done on first load.

Best for

• Online stores with carts and user-specific pages
• Blogs and content sites that need caching
• Sites using several CDNs or other optimization plugins