Select any word on any website. Get English definitions with synonyms and examples — plus translations into your native language. Build a richer vocabulary and express yourself with more precision. Works across 20 languages.
100% free to start · No credit card · Works on every website
Look up, save, and study — without ever leaving the page you're reading.
Highlight a word on any website. The definition popup appears instantly — with synonyms, part of speech, and examples. Don't see the right definition? Add your own notes or definition right in the popup.
Click "Save" and the word is captured along with the full sentence where you found it, the source URL, your custom notes, and a translation into your native language — all in under 2 seconds.
Open your dashboard to study with flashcards, take quizzes, or use Smart Review that focuses on words you struggle with. Track streaks, mastery, and progress over time.
Most people look up words and forget them five seconds later. Bellek fixes that.
You see a word you don't know. You Google it. You understand it for five seconds. Then you move on and forget it forever.
If you're serious about remembering it, you'd need to open a flashcard app, type the word, copy the definition, paste the context, pick a deck, and save it. That's a 30-second disruption for every single word.
Bellek collapses that entire workflow into a single click. Select the word, see the definition, click save. Done. Under two seconds. Your reading never stops.
One click saves the word with the exact sentence where you found it, the source page, and your custom notes. When you review later, you remember exactly how it was used.
Memory boostSet your preferred language and every definition gets translated automatically. See the word and its meaning in your language — right in the popup alongside the English definition.
Built on proven algorithms that show words right before you forget them. Words you know appear less. Words you struggle with appear more.
Your vocabulary belongs to you. Export anytime. We don't sell your data, track your browsing, or show ads. Privacy-first by design.
Whether you're learning a language, preparing for exams, or deepening your expertise — Bellek fits your workflow.
Reading in your target language? Select any word to see the definition plus an instant translation into yours. Save words from real content — not textbook examples.
Import existing word lists via CSV, or build new ones from practice materials. Flashcards with spaced repetition and quiz mode help you retain vocabulary under pressure.
Master industry jargon, technical terms, and domain-specific vocabulary as you encounter it in reports, papers, and articles. Organize by project or subject.
Reading challenging literature, non-fiction, or long-form journalism? Never skip a word. Look it up without breaking your reading flow, save the ones that enrich your vocabulary.
From discovery to mastery—here's how it works
While reading any website, simply select a word you want to look up. The popup appears automatically.
The company's ephemeral success in the market quickly faded as competitors emerged with better solutions...
Bellek popup appears instantly with the definition. Click save—the word and full sentence context are captured automatically.
Access your dashboard to study with flashcards and track your progress to mastery
Powerful features designed around one goal: help you remember the words that matter.
Select any word. See the English definition, synonyms, and examples in a clean popup — no new tab, no context-switching. No definition found? Add your own notes or definition right in the popup.
One click saves the word with the exact sentence where you found it, the source page, difficulty level, and synonyms. When you review later, you remember exactly how it was used.
Set your preferred language in Settings — change it anytime. Every word and definition gets translated automatically, right in the popup alongside the English original. Saved with the word so you see it during review too.
Words you know appear less. Words you struggle with appear more. Built on proven algorithms that show you each word right before you'd forget it.
Track daily streaks, mastery rates, weekly goals, and session history. See which words you've mastered and which need work — with personalized insights.
Bring your vocabulary from Anki, Quizlet, or spreadsheets — Bellek auto-detects the format. Export anytime to take your words anywhere.
Use Bellek as a free dictionary forever. Upgrade when you want unlimited saving, study modes, and translations.
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Look up words instantly, save the ones that matter, and master them with smart study tools.