MDN Web Docs App

Learn the web, one doc a day.

MDN Web Docs App is a fast, beautiful companion for the web platform's best reference. Look anything up in seconds, follow guided learning tracks, test yourself with daily quizzes and try code live, all in one place.

📖 A READER BUILT FOR PHONES
• Every MDN page in a clean, native reader
• Automatic light and dark mode, adjustable text size
• Bookmarks, history and a reading-progress bar

🎓 GUIDED LEARNING TRACKS
• 8 tracks and 61 lessons: HTML Foundations, CSS Styling Basics, Modern CSS Layout, JavaScript First Steps, Async JavaScript, Accessibility Essentials, HTTP Essentials and The Developer Toolkit
• Mark lessons complete and pick up exactly where you left off

🎯 DAILY QUIZ & PRACTICE
• A new 5-question quiz every day
• Topic quizzes for HTML, CSS, JavaScript, Web APIs, HTTP and Accessibility
• Every answer explained, with a link straight to the doc

🧪 CODE PLAYGROUND
• Write HTML, CSS and JavaScript and run it instantly
• Console output, starter templates and a coding symbol row

🔥 BUILD THE HABIT
• Streaks, XP, 8 levels and 16 badges to unlock
• Doc of the day and tip of the day
• One optional daily reminder, nothing more

🔍 SEARCH EVERYTHING
• Live search across 14,000+ docs on HTML, CSS, JavaScript, Web APIs, HTTP and more

No account needed. No tracking. Your progress stays on your device.

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This is an independent, unofficial app and is not affiliated with, endorsed by, or sponsored by Mozilla. Documentation is loaded from developer.mozilla.org, © Mozilla Contributors, licensed under CC-BY-SA 2.5. MDN and Mozilla are trademarks of the Mozilla Foundation.