Grav is a modern free and open source flat-file content management system. With Grav, you can publish content and build sites in a fast, flexible and simple manner with the file-based web platform. Grav requires zero installation and is just an zip archive that can be extracted to start using the CMS. Grave also comes with a powerful package management system that allow you to extend the feature set of Grav CMS. With the package management system you can install and upgrade themes and plugins written specifically for Grav. The software is written in PHP and released fully free and open-source under the MIT License.
Grav is fast and flexible thanks in part to the highly optimized flat-file architecture.
The system uses sophisticated caching throughout and knows when to update the cache automatically.
Unzip to install. Grav runs out-of-the-box. Zero configuration is required.
Command line tools such as dependency installation, cache clearing, user creation, and backups!
Our command line GPM system allows you to find, install, and easily update extensions for Grav
Documentation is not an afterthought! Grav has a dedicated documentation site plus loads of tutorials and guides.
Grav employs best-in-class technologies such as Twig, Markdown, YAML, Symfony components, and Doctrine Caching.
Powerful Configuration Overrides
Powerful YAML-based configuration with environment-based overrides allow the ultimate in configuration flexibility.
You can configure a single Grav to run multiple sites, as well as other advanced setups.
Human-readable URLs along with site-wide and per-page metadata provide fantastic SEO capabilities.
Routing and Redirection
Powerful site-wide and per-page routing and redirection capabilities provide improved usability and SEO flexibility.
Users and Roles
Easily create users and roles and set permissions to restrict access to any page.
Simple Backups / Restore
Being file based means backing up and restoring your data is trivial, and we even provide CLI tools to do it!
Grav has minimal requirements and runs on PHP 7.1.3 and greater out-of-the-box
Debugging and Logging
A powerful visual debug panel helps the development process by providing vital information in a clear way.
HTML or Markdown Content
Grav natively support Markdown content, but you can use plain HTML or even a mix if you wish.
Use your own native language, or support multiple different languages with ease.
Modular pages allow you to create a single page built from other 'modular' pages.
YAML-based page headers allow you easily add custom dynamic fields to your content.
Built-in support for customizable taxonomies such as tags or categories to help organize your content.
Version Control & Sync support
Use GIT, SVN, Dropbox, and other services to version and synchronize your data with ease.
Built-in Media Types
Grav natively understands and supports a variety of image, video, sound, and file formats.
Image Media Processing
Dynamic image manipulation to resize, crop, resample, effects and caching
Automatic Page Link Handling
Grav automatically handles a variety of approaches to easily create links between pages.
Automatic Page Image Handling
You can easily reference any image within the content structure, and even use media processing.
Native Retina/HiDPI Image Support
The only CMS with native support for properly displaying images on Retina and HiDPI.
No Design Restrictions
You don't have to feel trapped by your CMS, Grav imposes no limits on your creativity.
Twig Templating Language
Twig templating is best-in-class and provides powerful features along with great performance.
You can extend another theme and only modify the bits you need, allowing for easier updates.
A built-in Asset Manager allows powerful control over CSS and JS including compression and pipelining.
Access to Plugin Event Hooks
Themes provide full access to the abundant plugin event hooks allowing themes to have full control over Grav.
Extra Twig Filters & Functions
Take advantage of useful filters and functions bundled with Grav that expand the power of Twig.
Use any CSS Framework
You can use any third party CSS framework such as Bootstrap, Foundation, Pure, etc.
Extensive Plugins Available
Grav already has a tonne of open source plugins available to extend the core functionality.
Tonnes of Plugin Event Hooks
Plugins have full control over Grav with an extensive plugin event hook architecture.
Simple to Write
The plugin system, although powerful, is still simple, so writing your own plugins is a doddle.
Extensible by Design
Grav was written to be small and fast, but plugins allow you to extend the functionality as needed.
Optional but Useful
You don't need to use the admin panel, but it provides a great way for your users or authors to interact with Grav.
A simple and intuitive interface allows even non-technical people to create content and manage key aspects of Grav.
Define custom page structures with YAML blueprints, and you can even create plugins to extend the admin panel.
Grav features advanced form capabilities allowing you to develop sophisticated admin panels and configuration interfaces.
All the Features you Need
Because Grav is a flat-file CMS, you don't need the admin, so the admin panel only provides the features you need.
You can take advantage of the admin panel on a variety of devices, not just your desktop computer.
One-Click Installs and Updates
The admin panel allow for easy installation of plugins and themes as well as easy one-click updates.
Get a quick snapshot of how your site is doing with built-in usage statistics chart in the dashboard.
Grav is a free and open-source content management system released under the MIT License. You can use Grav for hobby and commercial projects alike.