Word Koala: Instant Synonyms & Meanings

Understand every word you read. Learn faster. Improve vocabulary.

Word Koala helps you learn English faster by showing smart synonyms, simple definitions, and frequency-based difficulty hints on any website. Whether you're reading news, books, blogs, or studying for exams, Word Koala acts like a Word Wise-style vocabulary assistant—built right into your browser. 🧠 What it does ✅ Show synonyms instantly when you hover ✅ Get simple definitions without breaking your reading flow ✅ See word difficulty (Zipf frequency scale) ✅ Highlight rare & advanced words ✅ Learn English naturally while browsing ✨ Perfect for English learners (A2–C1) ESL students & teachers Book readers & self-learners Writers & content creators Anyone expanding their vocabulary 🚀 Features Lightweight — no slowdown Privacy-friendly — runs locally Works on all websites Clean, distraction-free UI Click to see more detail when you want — or stay minimal 🦘 Why “Koala”? Calm, friendly, and helpful — Word Koala assists you quietly as you read, guiding you to stronger English without interrupting your experience. 🔒 Privacy First No tracking. No ads. Your reading stays on your device. Always.