Free AI Grammar Checker
Paste your text and press Check. An AI model corrects grammar, spelling and punctuation, then we highlight every change so you can accept it with your eyes open.
Nothing is sent until you press the button. Then your text goes to an AI model via Vercel AI Gateway, and is not stored.
Pressing the button sends this text and the option you picked to an AI model (via Vercel AI Gateway). We don't store it.
Corrected text
Your result will appear here.
How to use the grammar checker
- Paste up to 6,000 characters.
- Choose US or UK English and press "Check grammar".
- Review the highlighted changes and notes, then copy the corrected text.
How this AI tool works
This page is static until you press the button. Then your text (up to 6,000 characters) and the option you chose are sent to our server, which passes them to the openai/gpt-6-luna model through Vercel AI Gateway with instructions limited to this one task. The answer streams back as it is written. We do not log or store the text. Each visitor can make 10 requests per 10 minutes.
AI output can be wrong. Keep your original, read the result, and use the counters on this site to check length.
Questions
Is this grammar checker free?
Yes, with no account. To keep it free there is a length cap of 6,000 characters per check and a small hourly limit per visitor.
What happens to my text?
When you press the button, your text is sent to our server and on to an AI model through Vercel AI Gateway to generate the correction. We do not store it or use it for anything else. Nothing is sent until you click.
Can AI grammar checkers be wrong?
Yes. Models occasionally change meaning, miss errors or "fix" deliberate style. That is why every change is highlighted: read them before you accept.
Will it rewrite my style?
It is instructed to make minimal corrections and keep your wording. If you want a rewrite, use the paraphrasing tool instead.