Bellek - Smart Vocabulary Builder

Save words while browsing in 20 languages. Get instant definitions and translations, then master them with flashcards and quizzes.

Stop forgetting the words you look up. Bellek is a smart vocabulary builder that turns passive reading into active learning in any language. If you've ever looked up a word and forgotten it five minutes later, this vocabulary builder is for you. Highlight any word on any webpage to get the definition, synonyms, and the translation into your native language instantly. Save it with one click, and Bellek captures the source url and the original sentence as context so you always remember where you found it. No switching tabs. No copying into apps. No manual flashcard decks to build. Zero friction — just a smarter vocabulary builder built into your browser. Whether you're expanding your English vocabulary, studying for IELTS or TOEFL, reading in a foreign language, or collecting words that catch your eye — this vocabulary builder gives you one place to save, organize, study, and actually remember them. Bellek is the browser dictionary and vocabulary tracker that replaces scattered word lists, note-taking apps, and translation tools: everything in one place. 🌍 DEFINITIONS & TRANSLATIONS IN 20 LANGUAGES Bellek works across 20 languages — detecting the page language automatically and showing you the right definition and translation. English definitions — highlight any English word to see its definition, synonyms, and usage instantly. Translations — Bellek translates words from any language into your chosen language. Learning English and want definitions with translations in Spanish? Reading a Japanese blog and need it in Turkish? Set your native language once and get instant translations alongside definitions — no matter what language you're reading in. Supports 20 native languages including Turkish, Spanish, French, German, Italian, Portuguese, Russian, Arabic, Japanese, Korean, Hindi, Chinese, Dutch, Polish, Swedish, Thai, Ukrainian, Vietnamese, and Indonesian. Definitions in other languages — definitions in 20 additional languages are available in beta. 🧠 FLASHCARDS, QUIZZES & SPACED REPETITION This vocabulary builder doesn't just save words, it helps you actually learn them. Study with flashcards using spaced repetition, test yourself with multiple choice quizzes, or focus on your weak spots with smart review. Track your streak and mastery level for every word. Built for real vocabulary retention, not just word collecting. 📂 ORGANIZE YOUR VOCABULARY Group words into collections by topic, project, or language. Filter, sort, and search across everything in your vocabulary builder. Import word lists from CSV or export anytime. One vocabulary builder system instead of scattered notes, screenshots, and forgotten bookmarks. 📱 STUDY ON THE GO Scan the QR code from your extension to open bellek.app on your phone. Review flashcards and study your saved vocabulary on the bus, in a waiting room, or between classes. iOS and Android apps coming soon! 🔒 PRIVATE & LOCAL-FIRST Your data is stored locally in your browser. No account required, no sign-up, no tracking. Your words are yours. 💡 NON-INTRUSIVE DESIGN Turn the definition popup on or off anytime from the extension icon. Bellek stays out of your way when you don't need it. No clutter, no interruptions. 💎 FREE VOCABULARY BUILDER - 30 saved words - 3 collections - Unlimited flashcards - 3 translations per day - CSV import & export 💎 PREMIUM VOCABULARY BUILDER (7-day free trial) - Unlimited saved words - Unlimited collections - Unlimited translations - Multiple choice quizzes - Smart review with spaced repetition 🎯 BUILT FOR - Anyone who wants to express themselves better - English (ESL / EFL) learners building everyday vocabulary - Language learners studying English, French, Spanish, German, Turkish, Japanese, and 14 more languages - Students preparing for IELTS, TOEFL, GRE, or university exams who need flashcards and spaced repetition - Avid readers who want to learn new words - Anyone tired of forgetting the words they look up WHAT'S NEW - v1.3.0 - Translations now work on mixed-language pages (e.g. English articles with Arabic or Japanese words) - Export your words to CSV with full language support - Flashcards feel smoother with better time estimates and streak tracking - Toggle the definition popup on or off directly from the extension icon - Right-click "Look up in Bellek" works even when the popup is off - General speed and stability improvements