Grammar Checker
Catch common grammar mistakes with pattern-based checks.
- Reading time:
- 2 min
- Last updated:
- Price:
- Free, no signup
Type or paste text to see the result.
What the Grammar Checker does
Paste a paragraph and get a quick review of the most common slip-ups: doubled words ('the the'), missing capital letters at sentence starts, repeated spaces, and mismatched punctuation.
Each issue is flagged with its location and a suggested fix, so you can correct the original rather than trusting an automatic rewrite.
Why the Grammar Checker is useful
Not every check needs a heavyweight AI service. The errors that slip into emails and essays most often — doubled words, stray spaces, inconsistent capitalisation — are mechanical, and catching them mechanically is fast and private.
Because the check runs in your browser, unpublished drafts and confidential documents aren't sent to anyone's server.
Also known as: grammar checker, grammar check, grammar tool, free grammar checker, online grammar checker, grammar checker online free, grammar checker tool.
How to use the Grammar Checker
- 1
Paste your text
An email, essay section or post draft.
- 2
Review the flags
Each issue lists what was found and where.
- 3
Fix and re-check
Correct your original and paste again to confirm.
Key features
- Detects doubled words
- Flags capitalisation at sentence starts
- Catches repeated spaces and punctuation issues
- Private, instant, offline-capable checking
Benefits
- Catch embarrassing slips before sending
- Keep drafts private while checking
- Learn your recurring mistakes from the flags
Real-life use cases
Last-pass email check
A job seeker runs a cover email through the checker and catches a doubled 'and' before hitting send.
Essay cleanup
A student pastes each section after editing to catch mechanical errors the word processor missed.
Comment moderation
A forum mod quickly checks a long post for formatting glitches before approving it.
Tips for the best results
- This catches mechanical errors, not style — read aloud for flow.
- Fix one flag at a time and re-paste to verify.
- Pair with the Readability Checker for a fuller picture.
Conclusion
A fast, private first pass that catches the mechanical errors readers notice most.
Frequently asked questions
Does it use AI?
- No — it applies rule-based checks, which run instantly and privately.
Will it catch every grammar error?
- No. It targets common mechanical issues; complex grammar needs a human or a full AI service.
Is my text uploaded?
- No, checking happens entirely in your browser.
Does it fix the text automatically?
- It flags issues with suggestions; you decide what to change.
What errors does it catch best?
- Doubled words, double spaces, sentence-start capitalisation and punctuation spacing.
Can I check a whole essay?
- Yes, paste as much as you like.
Related tools you may need
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- Readability Checker — Score your writing with Flesch Reading Ease and grade level.
- Passive Voice Checker — Find passive-voice sentences and rewrite them for punch.
- Keyword Density Checker — See the most frequent words and their density in your text.
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Keep exploring
Browse the full tools directory, filter by category, or read guides on the Text Tools Hub blog.