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English grammar checker

Catch common mistakes and review a corrected draft before you share it.

Your text

0 / 10,000 characters

Corrected text

What it checks

Common English agreement errors, missing apostrophes in common contractions, frequent typos, and lowercase “i”.

Review the draft for context. This checker uses a limited set of rules and may miss errors.

◈ Your text stays on your device. Protop checks it in your browser.

Small tasks. Better done.
Free online tools. No signup required.

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