Dev to Hero

Color-codes JS docs by difficulty. 100% free, no account, no AI — runs entirely in your browser.

Learning to code is hard. Documentation is harder. MDN, W3Schools, 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, split between required (★) and optional (○) concepts. Click any prerequisite to mark it as mastered — saved across all your sessions. 📊 Page summary — see at a glance how many beginner, intermediate and advanced sections a page contains, plus an estimated reading time. ☐ Track your reading — mark sections as read and watch your progress bar fill up in real time. 🎯 Focus mode — hide all advanced sections so you can read without being overwhelmed. 📋 Export your study plan — download a personalized .txt file with your progress and prerequisites status. 💡 Next reading suggestions — at the end of every page, Dev to Hero suggests what to read next. ✎ Report incorrect badges — think a section is miscategorized? Vote to correct it. ⌨️ Keyboard shortcut — toggle the extension on/off with Alt+Shift+M. Works on: MDN Web Docs, W3Schools, javascript.info (multilingual), DevDocs Supports: JavaScript, CSS, HTML, Python, TypeScript, SQL and more 100% free. No account. No API. No ads. Your data never leaves your browser.