AntCMS is a flat-file CMS designed to use minimal system resources while delivering website speeds that rival a static site. Your content is just plain Markdown files on disk — no database required.

Write your pages in Markdown, configure the infrequent details in YAML, and let AntCMS handle the rest. Out of the box it will automatically generate your sitemap and robots.txt, compress your images, and serve your assets with efficient caching — no configuration needed.

• 🗄️ Flat-file architecture — content lives in Markdown files, no database to install or maintain
• ⚡ Blazing fast — performance rivaling a static site, with zero tuning required
• 📦 Built-in compression — gzip, Brotli, and zstd support for text-based assets (HTML, CSS, JS)
• 🖼️ Automatic image compression — JPEG, PNG, and WEBP optimized without lifting a finger
• 🔍 Easy SEO — automatic robots.txt and sitemap generation
• 🗂️ Smart caching — automatic ETags so returning visitors load pages faster
• 🎨 Custom themes — with per-theme styling for rendered Markdown content
• 🔌 Plugin support — extend AntCMS however you need

AntCMS requires PHP 8.4+ with the curl, dom, and mbstring extensions.

For the best performance, also install opcache, zstd, brotli, zlib, and gd. See the AntCMS readme for full details.

Note: AntCMS is currently preview software and is being actively rebuilt. Some planned functionality — including the admin UI and user management — is not yet available.