AI Grammar Checker
Check your text for grammar, spelling, and punctuation errors. Get instant corrections — runs entirely in your browser.
Processed on your device — never uploaded
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Frequently Asked Questions
How does this grammar checker work without AI models?
This tool uses an extensive rule-based engine built in pure JavaScript. It includes a dictionary of 500+ commonly misspelled words, pattern-matching for grammar rules like subject-verb agreement, confused word detection (their/there/they're, your/you're, etc.), and style analysis for passive voice and sentence length. Everything runs instantly in your browser with zero downloads.
What types of errors does it detect?
The checker identifies four categories of issues: Spelling errors (common misspellings), Grammar errors (subject-verb agreement, double words, missing capitalisation, a/an usage, confused words), Punctuation problems (double spaces, space before punctuation, missing end punctuation), and Style suggestions (passive voice, overly long sentences).
Is my text sent to any server?
No. All processing happens entirely in your browser using JavaScript. Your text never leaves your device. There are no API calls, no cloud processing, and no data stored anywhere.
Can I auto-correct all detected errors?
Yes! Click "Fix All" to automatically apply all spelling, grammar, and punctuation corrections. Style suggestions (like passive voice) are informational and not auto-corrected because they require human judgment to rephrase. You can also click individual errors to fix them one at a time.