VocabBuilder

Master vocabulary through spaced repetition — with daily reminders, progressive difficulty, and intelligent streak tracking. Perfect for GMAT, GRE, LSAT, and everyday learning.

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Everything you need to build your vocabulary

Proven spaced repetition science meets daily habit building.

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Spaced Repetition

Progressive review intervals (1→3→7→14→30 days) optimize memory consolidation and long-term retention.

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Daily Reminders

Smart 9 AM notifications keep you consistent. Build vocabulary as a daily habit, not a chore.

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4 Difficulty Levels

Choose Simple, Medium, Complex, or Competitive mode. Learn at your pace, from everyday to exam-level vocabulary.

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Badge System

Earn streak badges (3→7→30→365 days), word milestones, and monthly challenges to stay motivated.

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Progress Tracking

Monitor your current streak, total words learned, daily goals, and monthly progress in real-time.

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Rich Word Cards

IPA pronunciation, etymology, synonyms, antonyms, and usage examples for deeper understanding.

Built for everyone

Whether you’re preparing for an exam or building a lifelong vocabulary habit.

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Exam Aspirants

Master GMAT, GRE, LSAT, or CAT-level vocabulary with competitive exam words.

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ESL Learners

Build everyday and academic English at your own pace.

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Professionals

Sharpen communication for writing, presentations, and public speaking.

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Lifelong Learners

Build casual daily habits with a low-friction side panel experience.

Your words stay yours

100% local processing. Nothing leaves your browser.

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100% Local

All progress and word data stays in your browser. No servers, no cloud, no accounts.

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No Tracking

Zero analytics, zero cookies, zero data collection. We don’t know who you are.

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No External Scripts

Everything runs inside the extension. No CDNs, no remote code, no dependencies.

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Open Source

Every line of code is on GitHub. Audit it yourself — we have nothing to hide.

Get started in 30 seconds

Install the extension

Get it from the Edge Add-ons store.

Open the side panel

Click the VocabBuilder icon in your toolbar. The extension opens in the browser sidebar.

Choose your level

Select difficulty (Simple, Medium, Complex, or Competitive) in Settings based on your goals.

Start learning

Review your first word. Mark “Got It” when you know it, or “Not Yet” to review again later.