MDN Web Docs
The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps. It also has some developer-oriented documentation for Mozilla products, such as Firefox Developer Tools.
About MDN Web Docs
MDN Web Docs is a documentation site covering web technologies including HTML, CSS, JavaScript, and Web APIs, maintained since 2005. It provides reference material (elements, properties, selectors, methods), guides, and a learning curriculum covering frontend development topics such as HTML structuring, CSS styling and layout, and JavaScript scripting fundamentals. The site also documents browser technologies such as accessibility, HTTP, URIs, web extensions, WebAssembly, and WebDriver.
The site includes interactive tools such as a Playground, HTTP Observatory, and generators for border-image, border-radius, box-shadow, and color formats and mixing. It offers an MCP server that brings MDN's documentation and browser compatibility data into code editors and IDEs for use by LLMs and coding agents.
Content is maintained through open contribution via GitHub repositories (mdn/content and mdn/translated-content) and is available under a Creative Commons license. The site is available in multiple languages including German, English, Spanish, French, Japanese, Korean, Portuguese, Russian, and Chinese. It is intended for web developers seeking reference documentation, guides, and tutorials on web platform technologies.
Key features
- Comprehensive reference documentation for HTML, CSS, and JavaScript
- Web API reference and guides covering interfaces like Fetch, Geolocation, and Service Worker
- Structured learning courses and curriculum for frontend web development
- Browser compatibility data accessible via an MCP server for editors and IDEs
- Interactive developer tools including a code playground and HTTP Observatory
- Multilingual documentation available in languages such as German, Spanish, French, and Japanese
Frequently asked questions
What technologies does MDN Web Docs cover?
MDN documents HTML, CSS, and JavaScript, along with Web APIs and other web technologies like HTTP, WebAssembly, and accessibility.
Who is MDN Web Docs for?
It is aimed at web developers, from beginners taking the frontend developer course to experienced developers referencing API and language specifications.
Does MDN offer tools beyond documentation?
Yes, MDN provides tools such as a Playground, HTTP Observatory, and generators for CSS features like border-radius and box-shadow.
Can MDN's documentation be integrated into a code editor or IDE?
Yes, MDN offers an MCP server that brings its documentation and browser compatibility data directly into editors or IDEs for use by LLMs or coding agents.
Is MDN Web Docs available in multiple languages?
Yes, content is available in languages including German, Spanish, French, Japanese, Korean, Portuguese, Russian, and Chinese.
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