Blindspot — Save Vocabulary & Fix Grammar Anywhere

Save words from any site for free and get AI grammar feedback on your writing. 20 free checks, then credits. Learn English.

Blindspot turns everything you read online into English practice. Save vocabulary from any website and get instant AI grammar feedback on anything you write — right where you already read and type. ★ SAVE VOCABULARY FROM ANY SITE Highlight any word or phrase on any page — articles, Reddit, Twitter/X, docs, YouTube comments — and save it straight to your personal vocabulary with one click. No copy-paste, no switching tabs. ★ INSTANT AI GRAMMAR CHECK Writing an email in Gmail, a comment, or a message? Select up to 1000 characters and get clear AI grammar feedback that explains the fix — not just a red underline. Works on any website. ★ IT LEARNS YOUR BLIND SPOTS Every word you save and every mistake you make builds a personal profile in the Blindspot app: a smart vocabulary list and a grammar profile, plus adaptive exercises that target exactly what you get wrong. ★ PRICING Saving words is always free. Writing checks use credits: every new account gets 20 free checks, and you can buy more credits at blindspot.study whenever you need them. Your balance is always visible in the extension. ★ TWO-CLICK SETUP Sign in with Google and you're ready. HOW IT WORKS 1. Install and pin the extension. 2. Sign in with Google. 3. Highlight a word → Save (free). Select your writing → Check (1 credit). 4. Review your words, grammar profile and exercises at blindspot.study. WHY BLINDSPOT Most tools either translate words OR check grammar. Blindspot does both, from any site, and remembers what you struggle with so your practice actually adapts to you. Learn English while you browse. Turn passive reading into active vocabulary and cleaner writing.