AI Grammar Checker

AI Grammar Checker is a free tool that fixes grammar, spelling, punctuation, and awkward phrasing in any text. Unlike rule-based checkers, it uses a large language model to understand context — so it corrects real mistakes and leaves intentional choices alone.

Paste your text, click “Fix Grammar”, and the corrected version appears in seconds. Review the changes, copy the clean version, and paste it back wherever you’re writing — Gmail, Outlook, Google Docs, or anywhere else.

AI Grammar Checker corrects:

• Grammar — subject-verb agreement, tense consistency, article usage
• Spelling — typos and misspellings across 30+ languages
• Punctuation — missing commas, misplaced apostrophes, quotation marks
• Clarity — awkward phrasing, run-on sentences, redundant words
• Style — mild polish (passive voice, hedging language)

It does not rewrite your content or change your meaning — the goal is a clean, polished version of what you actually wrote.

Yes. The tool corrects errors without rewriting style. If you write casual, the output stays casual. If you’re formal, it stays formal. If you want to change tone specifically, use our AI Email Writer, which is built for rewriting.

Yes — emails are one of the most common use cases. It’s especially useful for non-native speakers writing business emails, or anyone sending high-stakes messages (job applications, client pitches, executive communication) where a typo undermines credibility.

Grammarly and Microsoft Editor use a mix of rules and smaller models, with premium features behind a paywall. AI Grammar Checker runs on the same class of large language models used by leading AI writing tools — completely free, no sign-up, and no browser extension required. For a permanent in-app experience, install our AI Email Assistant for Gmail.

30+ languages including English, Spanish, French, German, Italian, Portuguese, Dutch, Polish, Japanese, Korean, Chinese, Arabic, and more. Just paste text in your language — the tool auto-detects and responds in kind.

You can check up to several thousand words per request — roughly a long email, a blog post, or a short report. For very long documents, break them into sections and check each one separately.

At the moment the tool returns the polished version directly without a diff view. If you want to see what changed, paste the before/after into any text diff tool — we’ll likely add side-by-side highlighting in a future update.

Yes, completely free. No sign-up, no credit card, no usage quota, and no ads. Mailmeteor provides it as a free utility alongside our other email tools.

Your data stays yours. Text is securely transmitted to our AI provider for processing, is not used to train any model, and is not retained beyond the short abuse-prevention window required by the provider. Mailmeteor does not log or store your content.