Korr

Free offline grammar checker for 5 languages, no account

8 followers

Free offline grammar checker for 5 languages, no account

8 followers

•

•

Korr fixes French, English, Spanish, Italian and Portuguese right where you write: no account, no limit, no connection needed. Everything runs on your device. There is no analysis server, and you can check it: cut your connection after the first load and it keeps working. Every change is listed and can be rejected one by one. When a fix is uncertain, Korr changes nothing. Website and Chrome extension (Alt+Shift+C) for all five languages; Windows app (Ctrl+Alt+C) for French and English.

This is the 2nd launch from Korr. View more

Korr

Launched this week

Free offline grammar checker for 5 languages, no account

Free

Launch tags:Chrome Extensions•Writing•Security

Launch Team / Built With

Maker

📌

Hi Product Hunt 👋 I built Korr because every grammar checker I tried sent my text to its servers, asked for an account, and capped the free plan. So Korr runs entirely on your device. There is no analysis server at all, and you don't have to take my word for it: load the page, cut your connection, and it keeps correcting. The hardest part wasn't correcting, it was knowing when NOT to. A checker that damages a correct sentence is worse than no checker, so every rule ships with counter-examples that must come out untouched. On our published corpora, 174 sentences were already correct, and none of them was damaged. We also publish our accuracy with the method, including a benchmark written after tuning, where the numbers are lower and we say why: https://korr.peekrapp.com/spell-... It's free, with no paid tier. The website and Chrome extension cover five languages; the Windows app covers French and English. I'd love your feedback, especially sentences Korr gets wrong.

Report

7d ago

Maker

THAT S THE DAY

Report

6d ago

Previous Korr Launches

Korr IAFrench/English AI editor that never sees your text

Launched on July 21st, 2026