Grammar Checker scans text for grammar, punctuation, and style issues, with each suggestion explained so you can accept, reject, or learn from the correction rather than getting a silent auto-fix.
Their going to review the the report tomorrow, and sends feedback by friday.
They're going to review the report tomorrow and send feedback by Friday.
Each change comes with a reason: "their → they're" (contraction of "they are"), a repeated word, verb agreement, and a capital letter for days of the week.
Consultants run final reports through the grammar checker to catch typos and awkward phrasing before client delivery.
Students use the grammar checker for final review of essays and applications, catching errors spell-check misses.
Translators verify human translations with the grammar checker to ensure native-speaker fluency in the target language.
Paste it in, or upload a PDF or Word file — up to 10,000 words at a time.
Grammar, spelling and style suggestions are marked separately, so hard errors stand out.
Every suggestion explains the rule, so you learn as you fix.
Keep your own style where you disagree, then copy or export the corrected text.
Yes — each flagged issue includes a short explanation of the rule or style reason behind it.
The grammar checker achieves 98%+ accuracy on standard grammar rules and 92-95% on subtle style/tone issues. Uses Claude Sonnet 4.5 for context-aware correction.
30+ languages including English (US/UK/AU), Spanish, French, German, Italian, Portuguese, Dutch, Polish, Russian, Japanese, Chinese (Simplified/Traditional).
Yes. Beyond grammar, it flags passive voice overuse, wordy phrasing, tone inconsistency, and offers rewrites. Pick which suggestions to apply.
Yes. Select "Business" or "Formal" tone and the grammar checker flags casual phrasing, contractions, and slang that may not fit the context.
Yes. Upload a PDF and the grammar checker extracts text (with OCR if scanned), checks grammar, and lets you export the corrected version.
No. Anthropic's API does not train on customer data. Your text is private and auto-deletes in 24 hours.
The grammar checker uses Claude Sonnet 4.5 (state-of-the-art LLM) for deeper context awareness than rule-based checkers. Catches subtle issues Grammarly misses, especially in technical writing.
3 scans per day on guest and free accounts. Pro gets 50/day, Business unlimited. No credit card for any tier.
