Writing tool
Grammar Checker
The Grammar Checker scans your text for common mistake patterns — like mixing up their, there, and they're, or your and you're — and tells you what it found.
The check runs locally in your browser, so your text never leaves your device.
Privacy & data handling
Browser processingThis tool processes your input locally in your browser. Nothing is uploaded to a server or sent to an external service.
Interactive tool
Grammar Checker
Real-time client-side analysis of frequently confused homophones, repeated words, and spelling mistakes.
Paste text on the left to analyze confusable words...
Overview
What does Grammar Checker do?
Paste your text and the tool looks for a small set of frequently confused word pairs — their/there/they're, your/you're, its/it's, affect/effect, than/then, to/too, and therefor/therefore. It is a spot-check, not a full grammar review.airs, reporting possible issues and the total word count. If none of the patterns appear, it says so plainly.
It is a quick first pass for the most common mistakes, not a full grammar engine.
Under the hood
How does it work?
The tool runs a handful of case-insensitive patterns over your text, each matching a confused homophone pair like their/there/they're or your/you're. Any match adds a possible grammar issue note to the report.
Key features
Features of Grammar Checker
Use cases
When should you use Grammar Checker?
Proofreading emails
Run an important email through before sending to catch the most common slips.
Quick writing checks
Scan a draft before you do a full read-through for other issues.
Learning common mistakes
See which confused-word patterns your writing actually trips on.
Step-by-step
How to use Grammar Checker
- Step 1
Paste or type your text.
- Step 2
The tool highlights potential issues.
- Step 3
Review and apply corrections.
Real example
Example
Before (input)
Their going to the park with there friends, and your invited too.
After (report)
Grammar Check Possible grammar issue Words: 13
The tool flags the their/there and your/you're patterns but does not fix them for you.
Technical information
How the details work
The checker applies several regular-expression patterns for commonly confused homophones. Each pattern match is counted as a possible issue; the report lists the count and the total word count of the input.
Privacy & security
Your data stays yours
All processing happens locally in your browser. Your text is never uploaded or stored.
Local processing — files stay in your browser
- The check runs on your device with no network requests.
- Nothing you paste is saved after the tab is closed.
- No account or data collection of any kind.
Limitations
What this tool does not do
- It only checks the built-in homophone patterns — many grammar and style issues are not covered.
- It flags possible issues; it does not rewrite or fix your text.
- It is a lightweight checker, not a full proofreading service.
Frequently asked questions
Common questions about Grammar Checker
Does it catch all grammar mistakes?
No — it targets the most common confused word pairs. Subject-verb agreement, punctuation, and style issues need a fuller review.
Will it fix my mistakes?
It reports possible issues; you make the corrections yourself.
Why does it only check a few patterns?
The tool is intentionally lightweight and local. It covers the highest-frequency mistakes so the most common slips are caught instantly.
Is my text private?
Yes. Everything runs in your browser and nothing is transmitted or stored.
How should I use this?
Run it as a first pass, then read your text aloud or use a fuller editor for the rest.
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Related guides
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