Dev to Hero szerző: Anthony YAMMINE

Learning to code is hard. Documentation is harder. MDN, DevDocs and javascript.info are incredible resources — but they treat a beginner and a senior developer exactly the same way.
Every section looks equally important. Nothing tells you where to start.
Dev to Hero fixes that.

It automatically color-codes every section of a documentation page based on its difficulty level:
🟢 Beginner — read this now
🟡 Intermediate — come back after the basics
🔴 Advanced — no need to stress about this yet

But it goes much further than just color badges:

📌 Smart prerequisites — each section tells you exactly what you need to know first, sorted by learning order and split between required (★) and optional (○) concepts. Each prerequisite links directly to the relevant doc page. Click once to mark as approached, click twice to mark as mastered — synced across all supported sites and sessions.

📊 Page summary — see at a glance how many beginner, intermediate and advanced sections a page contains, which prerequisites you still need to master, plus an estimated reading time.

☐ Track your reading — mark sections as read and watch your progress update in real time.

🎯 Focus mode — show or hide beginner, intermediate and advanced sections independently so you can focus on exactly what's relevant to your level.

📋 Export your study plan — download a clean, structured study plan showing all sections by level, your read status, and prerequisites still to cover.

💡 Next reading suggestions — at the end of every page, Dev to Hero suggests what to read next based on your knowledge.

✎ Report incorrect badges — votes are currently local to your browser. Shared community voting may be added in a future update.

⌨️ Keyboard shortcut — toggle the extension on/off with Alt+Shift+D.

Currently supported sites:

MDN Web Docs (HTML EN + FR, CSS EN + FR, JavaScript EN + FR), DevDocs (HTML EN, CSS EN, JavaScript EN), javascript.info (EN)
6 694 pages covered — with more added regularly.

Coming soon: React, Express, SQL, Python, TypeScript, Markdown fonctionnality online and more.

100% free. No AI. No account. No API. No ads.

Changelog :

[2.1.0] - 2026-06-14

Added

FRENCH IS HERE !!!! 2.0.4 --> 2.1.0 and a BIG surprise !

• Full HTML & Full CSS & Full JavaScript in french for MDN (2,004 new pages !)
• Now 6,694 pages covered.
• Dev to Hero is now available on Edge and Opera browsers (download on the Chrome Web Store). Firefox is submitted today, I will warn you when it's official.

2026-06-07

• Still on 2.0.4, but with new screenshots on the Chrome Web Store, and the link of the short commercial video.

[2.0.4] - 2026-05-29

Added

• Full HTML & Full CSS in english for DevDocs
• Full JavaScript for MDN and DevDocs (831 new pages on each website),
  with now a total of 979 pages of JavaScript covered on each.
• 2,461 new pages added for MDN and DevDocs. Now 4 690 pages covered.

[2.0.3] - 2026-05-13

Added

• Full HTML & Full CSS in english for MDN, very soon available for DevDocs
• 908 new pages added in MDN. Now 2,229 pages covered.

[2.0.2] - 2026-05-06

Added

• Support for 341 DevDocs pages
• Finalized reading tips at the bottom of pages
• 1,321 pages covered by Dev to Hero

Fixed

• JavaScript MDN EN 148 pages
• Bug fixes

[2.0.1] - 2026-05-04

Fixed

• Bug fixes