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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

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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.

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  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 234 65

  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 49

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

    Browser compatibility data for Web technologies as displayed on MDN

    JSON 5.8k 2.7k

  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 136 repositories
  • 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 11,031 23,252 229 (47 issues need help) 133 Updated Oct 8, 2026
  • dex Public

    MDN's deployment infrastructure.

    mdn/dex's past year of commit activity
    JavaScript 6 MPL-2.0 4 12 14 Updated Oct 8, 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 5,760 CC0-1.0 2,658 355 (6 issues need help) 41 Updated Oct 8, 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 49 57 31 Updated Oct 8, 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 1 Updated Oct 8, 2026
  • 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 2,038 8,307 176 (17 issues need help) 277 Updated Oct 8, 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 234 MPL-2.0 65 107 41 Updated Oct 8, 2026
  • triagebot Public
    mdn/triagebot's past year of commit activity
    JavaScript 6 MIT 3 0 1 Updated Oct 7, 2026
  • curriculum Public

    MDN front-end developer curriculum

    mdn/curriculum's past year of commit activity
    TeX 380 47 3 2 Updated Oct 7, 2026
  • css-examples Public

    Code examples that accompany the MDN CSS documentation

    mdn/css-examples's past year of commit activity
    HTML 646 CC0-1.0 830 8 (2 issues need help) 0 Updated Oct 7, 2026