Skip to content
@mdn

MDN Web Docs

Data and tools related to MDN Web Docs (formerly Mozilla Developer Network, formerly Mozilla Developer Center...)

👋 Welcome, Bienvenue, ようこそ, 환영합니다, Bienvenido, Bem-vindos, Добро пожаловать, 欢迎, 歡迎, أهلا

github-profile

MDN Web Docs is an open-source, collaborative project that documents web platform technologies, including CSS, HTML, JavaScript, and Web APIs. We also provide extensive 🧑‍🎓 learning resources for beginning developers and students.

Note: By participating in and contributing to our projects and discussions, you acknowledge that you have read and agree to the Mozilla community participation guidelines.

🙌 MDN's mission

MDN's mission is to provide a blueprint for a better internet and empower a new generation of developers and content creators to build it.

The power of MDN Web Docs lies in its vast community of active readers and contributors. Since 2005, approximately 45,000 contributors have created the documentation we know and love. Together, contributors have created over 45,000 documents that make up an up-to-date, comprehensive, and free resource for web developers worldwide. In addition to English-language articles, over 35 volunteers lead translation and localization efforts for Chinese, French, Japanese, Korean, Portuguese, Russian, and Spanish.

🤝 Be part of MDN Web Docs

You can be part of MDN Web Docs, whether it be through ✍️ content contributions, ⚙️ engineering, or ↔️ translation work. The MDN Web Docs project welcomes contributions from everyone who shares our goals and wants to contribute constructively and respectfully within our community. 🧘‍♂️

MDN Web Docs is a complex project with lots of moving parts. See MDN Github repositories to get familiar with the different code repositories.

🌎 Our community

We're proud to have a global community of contributors and developers, who also want to say 👋

స్వాగతం സ്വാഗതം Merhaba خوش آمدید
स्वागत है Selamat Datang வணக்கம் მოგესალმებით
Ласкаво просимо مرحباً خوش آمدی স্বাগতম
Dobro došli שלום Добре дошли 환영합니다

✉️ Get in touch

You can ask questions or get in touch with the MDN Web Docs team and community through any of our communication channels.

Pinned Loading

  1. content content Public

    The official source for MDN Web Docs content. Home to over 14,000 pages of documentation about HTML, CSS, JS, HTTP, Web APIs, and more.

    Markdown 11k 23.3k

  2. fred fred Public

    MDN's frontend since late 2025, built with Web Components, Lit, and SSR for a fast, clean documentation experience. Fred = /fr(ont)e(n)d/.

    JavaScript 233 62

  3. rari rari Public

    Rari is a Rust-based build system that transforms markdown into structured JSON, powering MDN Web Docs content and translations since 2024.

    Rust 57 47

  4. browser-compat-data browser-compat-data Public

    Browser compatibility data for Web technologies as displayed on MDN

    JSON 5.8k 2.6k

  5. translated-content translated-content Public

    7 community-maintained translations of MDN Web Docs in ES, FR, JA, KO, PT-BR, RU, and ZH, to learn and contribute in your native language.

    Markdown 2k 8.3k

  6. mdn mdn Public

    Planning and proposals for MDN Web Docs content

    1.4k 204

Repositories

Showing 10 of 134 repositories
  • translated-content Public

    7 community-maintained translations of MDN Web Docs in ES, FR, JA, KO, PT-BR, RU, and ZH, to learn and contribute in your native language.

    mdn/translated-content's past year of commit activity
    Markdown 2,031 8,303 174 (19 issues need help) 294 Updated Sep 23, 2026
  • browser-compat-data Public

    Browser compatibility data for Web technologies as displayed on MDN

    mdn/browser-compat-data's past year of commit activity
    JSON 5,751 CC0-1.0 2,640 348 (6 issues need help) 23 Updated Sep 23, 2026
  • dex Public

    MDN's deployment infrastructure.

    mdn/dex's past year of commit activity
    JavaScript 6 MPL-2.0 4 11 11 Updated Sep 22, 2026
  • translated-content-de Public

    Experimental German locale for MDN, aimed at German-speaking users that prefer to read MDN Web Docs in their native language

    mdn/translated-content-de's past year of commit activity
    Markdown 20 21 7 3 Updated Sep 23, 2026
  • rari Public

    Rari is a Rust-based build system that transforms markdown into structured JSON, powering MDN Web Docs content and translations since 2024.

    mdn/rari's past year of commit activity
    Rust 57 47 59 17 Updated Sep 22, 2026
  • dom-examples Public

    Code examples that accompany various MDN DOM and Web API documentation pages

    mdn/dom-examples's past year of commit activity
    JavaScript 4,039 CC0-1.0 1,925 10 (6 issues need help) 9 Updated Sep 22, 2026
  • content Public

    The official source for MDN Web Docs content. Home to over 14,000 pages of documentation about HTML, CSS, JS, HTTP, Web APIs, and more.

    mdn/content's past year of commit activity
    Markdown 11,011 23,252 247 (58 issues need help) 130 Updated Sep 22, 2026
  • fred Public

    MDN's frontend since late 2025, built with Web Components, Lit, and SSR for a fast, clean documentation experience. Fred = /fr(ont)e(n)d/.

    mdn/fred's past year of commit activity
    JavaScript 233 MPL-2.0 62 102 27 Updated Sep 22, 2026
  • data Public

    This repository contains general data for Web technologies

    mdn/data's past year of commit activity
    JavaScript 787 CC0-1.0 216 37 (2 issues need help) 2 Updated Sep 22, 2026
  • tree-sitter-mdn Public

    MDN's macro grammar for tree-sitter

    mdn/tree-sitter-mdn's past year of commit activity
    JavaScript 4 MIT 4 1 2 Updated Sep 22, 2026