Free Grammar Checker Online — AI-Powered
Paste your text and get instant corrections for grammar, spelling, punctuation, and style. Each correction includes a clear explanation. No signup required.
How to Use the Grammar Checker
- Choose a mode — Quick for spelling and grammar, Deep for comprehensive writing quality analysis.
- Paste your text — type or paste up to 5,000 characters into the text area.
- Click "Check Grammar" — or press Cmd/Ctrl+Enter to run the analysis.
- Review corrections — hover over green highlights to see what changed and why.
- Copy corrected text — use the Copy button to get the fixed version with one click.
Types of Errors Detected
Spelling
Misspelled words, typos, and incorrect word forms.
Grammar
Subject-verb agreement, wrong tense, missing articles.
Punctuation
Missing commas, incorrect apostrophes, run-on sentences.
Style
Passive voice, wordiness, and clarity issues (Deep mode).
Frequently Asked Questions
What types of errors does this grammar checker find?
The checker identifies four types of errors: Spelling (misspelled words), Grammar (incorrect verb tense, subject-verb agreement, etc.), Punctuation (missing commas, apostrophes, etc.), and Style (wordiness, passive voice, clarity issues — in Deep mode).
What is the difference between Quick and Deep check?
Quick check focuses on essential errors: spelling, grammar, and punctuation mistakes. Deep check also analyzes writing quality issues like passive voice, wordiness, run-on sentences, and clarity problems.
Is my text sent to a server?
Yes, your text is sent to a secure API to use AI analysis. However, we do not store your text — it is processed and immediately discarded. No account or login is required.
How do I see what was corrected?
Corrections are highlighted in green in the corrected text. Hover over any highlighted word to see the original text and an explanation of what was fixed. The error list below shows all issues in detail.
What is the maximum text length?
The grammar checker supports up to 5,000 characters per check, which is approximately 750-1,000 words. For longer documents, split the text into sections.
Can I use a keyboard shortcut to run the check?
Yes. Press Cmd+Enter (Mac) or Ctrl+Enter (Windows/Linux) to run the grammar check without using the mouse.