What is English Grammar Checker?
Built-in rules catch capitalization, typos, common grammar mix-ups, and missing apostrophes.
▶Use Cases3 scenarios
- ◆Email proofreading
- ◆Essay checking
- ◆Writing aid
▶How to Use4 steps
- 1Paste text
- 2Click Check
- 3Review issues
- 4Copy corrected
▶Features4 features
- ✓Free
- ✓Instant
- ✓Issues highlighted
- ✓One-click copy
▶FAQ9 questions
What is English Grammar Checker?
An online Auto-detect spelling, grammar, and punctuation errors with instant corrections.. Everything runs locally in your browser — no uploads.
What is a grammar checker?
An online tool that automatically detects spelling errors, grammar issues, and punctuation mistakes in English text. Input is English text, output highlights problems and suggests corrections.
Does it support Chinese?
No. Currently English grammar detection only, powered by 30+ built-in English grammar rules.
What types of errors can it detect?
Capitalization errors, typos, subject-verb agreement, tense mixing, missing punctuation, extra spaces, and 30+ categories of common English grammar issues.
Is my text uploaded to a server?
No. All text analysis runs locally in your browser using a JavaScript rule engine.
How much text can I check?
Up to 50,000 characters per input, enough for everyday writing needs.
Is this tool free?
Completely free. No signup, no login, no usage limits.
How is this different from Grammarly?
Grammarly uses cloud-based AI models; this tool uses a local JavaScript rule engine. Grammarly covers more use cases but sends your data to servers; this tool runs entirely in your browser.
Are the suggestions accurate?
Suggestions are based on explicit grammar rules and work well for basic errors. Complex semantic issues may go undetected — important documents should still be manually reviewed.