Online grammar checker

What it does and when to use it

Paste text or read a file, review the source and authorize sending it to OpenAI. The checker corrects spelling, grammar and punctuation while preserving meaning. Compare both versions.

Method and limits

Up to 20,000 characters per request. Files up to 20 MB; PDFs: at most 20 selected pages. No automatic OCR. Check reading order, especially columns and tables. Requests are limited per account and IP to prevent abuse.

AI can make mistakes. Compare names, numbers, negations and meaning against the original.

How is AI text processed?

Your reviewed text is sent through our server to OpenAI to generate the result. We do not save text, files or results in your account and request no response storage as application state (store=false). OpenAI does not train models on API data by default; it may retain security logs for up to 30 days, subject to policy exceptions. This is external processing, without a zero retention guarantee. Abuse prevention counters contain only pseudonymous identifiers and counts, retained for up to 72 hours.

A practical example

Method and limits

• OpenAI — Data controls