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- Free AI Grammar Checker — Fix Grammar Instantly Online
✓100% Free✓No Signup✓No Data Stored✓Works Instantly
✦ Free Online Tool
FREE AI GRAMMAR CHECKER
Fix grammar, spelling and punctuation errors instantly with AI. Free online grammar checker — no signup, no word limits.
Fix GrammarFix SpellingImprove StyleMake FormalSimplify
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What the AI Grammar Checker Fixes
- Grammar errors — subject-verb agreement, wrong tense, missing articles
- Spelling mistakes — typos and homophones (their/there/they're)
- Punctuation — missing commas, incorrect apostrophes
- Style — passive voice, wordiness, repetitive words
Frequently Asked Questions
Is it really free?+
Yes, 100% free with no word limits. You need a free Anthropic API key from console.anthropic.com.
What errors does it fix?+
Grammar, spelling, punctuation, passive voice, awkward phrasing and style issues.
Is my text stored?+
No. Your text is sent to the Anthropic API and returned. We never store it.
How do I get an API key?+
Visit console.anthropic.com, create a free account, and generate a key. New users get $5 free credits.