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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. 🧘‍♂️

🌎 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 10.5k 23.1k

  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 76 28

  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 35 26

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

    Browser compatibility data for Web technologies as displayed on MDN

    JSON 5.6k 2.5k

  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 1.9k 8.3k

  6. mdn mdn Public

    Planning and proposals for MDN Web Docs content

    1.3k 188

Repositories

Showing 10 of 134 repositories
  • beginner-html-site-styled Public

    A simple one page website created to help complete beginners learn HTML basics, which in this repo has also been styled to help beginners learn CSS basics. The styling is explained over the course of https://developer.mozilla.org/en-US/Learn/Getting_started_with_the_web/CSS_basics.

    mdn/beginner-html-site-styled’s past year of commit activity
    HTML 254 CC0-1.0 939 0 7 Updated Feb 4, 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 5,578 CC0-1.0 2,487 422 (8 issues need help) 57 Updated Feb 4, 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 10,492 23,089 321 (101 issues need help) 94 Updated Feb 4, 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 15 14 5 1 Updated Feb 4, 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 1,946 8,324 164 (16 issues need help) 230 Updated Feb 4, 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 76 MPL-2.0 28 119 21 Updated Feb 4, 2026
  • yari Public

    The platform code behind MDN Web Docs

    mdn/yari’s past year of commit activity
    TypeScript 1,274 MPL-2.0 548 2 (1 issue needs help) 3 Updated Feb 4, 2026
  • rumba Public

    The clean kuma (🤖🧹)

    mdn/rumba’s past year of commit activity
    Rust 59 MPL-2.0 21 3 4 Updated Feb 4, 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 35 26 44 6 Updated Feb 3, 2026
  • mdn-http-observatory Public

    Backend for HTTP Observatory on MDN

    mdn/mdn-http-observatory’s past year of commit activity
    JavaScript 104 MPL-2.0 28 12 3 Updated Feb 3, 2026