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AI Grammar Checker

A grammar checker analyses text for grammar, spelling and style problems and suggests corrections. This tool sends your text to LanguageTool, a long-established open-source proofreading engine, and returns each match with its position, an explanation and up to five suggested replacements.

Last updated · Free, no signup

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How does this grammar checker work?

A grammar checker analyzes text for spelling, grammar, punctuation, and style patterns and returns located suggestions with explanations. This page shows each LanguageTool match with its offset, rule message, and up to five possible replacements so edits can be evaluated rather than applied blindly.

Text up to 5,000 characters is sent to LanguageTool's hosted public API through the tool workflow, with a 15-second timeout. LanguageTool is rule-based and can miss context or suggest the wrong tone, terminology, or dialect. Review every change, especially in technical, legal, academic, or creative writing.