Free Grammar Check Online
Check your grammar instantly with our free AI-powered grammar checker. Fix grammar mistakes, improve sentence structure, and write with confidence.
✓ Free to use ✓ No sign-up required ✓ 15 checks/day
What Our Grammar Checker Finds
Grammar Mistakes
Subject-verb agreement, tense errors, pronoun usage, and more.
Sentence Structure
Run-on sentences, fragments, and awkward phrasing.
Punctuation
Commas, apostrophes, quotation marks, and other punctuation.
Spelling Errors
Typos and commonly misspelled words.
Common Grammar Mistakes We Catch
"Me and him was going to the store."
"He and I were going to the store."
"Your the best person their is."
"You're the best person there is."
"The team have finished their work."
"The team has finished its work."
"I could of done better."
"I could have done better."
ToneCheck vs Other Grammar Checkers
| Feature | ToneCheck | Grammarly | Others |
|---|---|---|---|
| Free grammar check | ✅ 15/day | ✅ Limited | Varies |
| Tone analysis | ✅ Included | 💰 Premium | ❌ No |
| Preserves your voice | ✅ Yes | ❌ Rewrites | ❌ Rewrites |
| iOS keyboard | ✅ Yes | ✅ Yes | ❌ No |
| No account required | ✅ Yes | ❌ No | Varies |
| Privacy-first | ✅ No storage | ⚠️ Stores data | ⚠️ Varies |
Grammar Check FAQ
What is a grammar checker?
A grammar checker is a tool that analyzes text for grammatical errors, including subject-verb agreement, tense consistency, punctuation, and sentence structure. ToneCheck's grammar checker uses AI to identify and suggest fixes for grammar mistakes.
Is the grammar check free?
Yes! ToneCheck offers free grammar checking with 15 checks per day. No sign-up or credit card required. Pro users get 200 checks per day for $5/month.
How accurate is the grammar checker?
ToneCheck uses advanced AI models (including Gemini and GPT) to provide highly accurate grammar checking. It catches common mistakes like subject-verb agreement, run-on sentences, and punctuation errors while preserving your writing style.
Can I use the grammar checker on my phone?
Yes! ToneCheck has an iOS app with a custom keyboard that lets you check grammar directly in WhatsApp, Slack, iMessage, Email, and any other app on your iPhone or iPad.
Does it check spelling too?
Yes! ToneCheck's grammar checker also includes spelling checking, so you can catch typos and misspellings along with grammar mistakes.
What types of grammar errors does it catch?
Our grammar checker catches subject-verb agreement errors, incorrect verb tenses, pronoun errors, double negatives, run-on sentences, sentence fragments, punctuation mistakes, and more.
Check Grammar in Any App
Download ToneCheck for iOS to check grammar directly in WhatsApp, Slack, iMessage, and any other app.