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✍️ Grammar Checker – Fix Spelling, Punctuation & Style Errors

Paste your text below and check for grammar, spelling, punctuation, and style mistakes using the free LanguageTool API. Improve content quality for SEO and user experience. 100% client-side, free, no signup.

How to use:
✅ Copy your article text → paste into the box → click "Check Grammar" → instant grammar report.
📝 Sample text: Click "Load Sample Text" to see how the tool works.
💡 For best results, paste at least 50 characters of continuous text.

📈 Why Grammar Matters for SEO & Credibility

Grammar, spelling, and punctuation directly affect how users perceive your content quality. Poorly written text increases bounce rates, reduces time on page, and damages brand trust. While Google doesn't explicitly penalize grammar mistakes, user engagement signals (dwell time, bounce rate) influenced by readability and professionalism do affect rankings. Our free Grammar Checker helps you catch errors before publishing.

🔍 How Our Grammar Checker Works

We send your text to the LanguageTool API (a free, open-source grammar checker). It analyzes your text for grammar, spelling, punctuation, style, and even passive voice or wordiness. The API returns a list of errors with replacements, explanations, and offsets. We then display them clearly so you can improve your content.

📊 Quality Score

The quality score is calculated based on the number of errors per 100 words:

  • 90-100%: Excellent – very few or no errors.
  • 70-89%: Good – minor issues, easy to fix.
  • 50-69%: Needs improvement – several errors.
  • <50%: Poor – significant rewriting recommended.

⚠️ Common Grammar Mistakes Affecting SEO

  • Subject-verb agreement (e.g., "The team are ready" → "The team is ready")
  • Punctuation errors – missing periods, comma splices.
  • Spelling mistakes – typos that undermine credibility.
  • Wordiness and passive voice – reduce clarity and engagement.
  • Incorrect word usage (e.g., "their/there/they're", "your/you're").

❓ Frequently Asked Questions

Is my text private when using the API?
Text is sent to LanguageTool's public API for processing. LanguageTool does not store your text permanently (they anonymize and retain only for debugging). For maximum privacy, you can also run LanguageTool locally.
What languages are supported?
LanguageTool supports over 30 languages, including English (en-US, en-GB), Spanish, French, German, etc. Our tool currently uses English by default but can be extended.
Is there a text length limit?
LanguageTool free API can handle up to ~10,000 characters per request. For very long texts, you may split into sections.

API Limits & Privacy

Rate limit: LanguageTool's public API allows ~20 requests per minute. If you exceed this, please wait a few seconds and retry. We do not store any text – all processing is via the API.

Keywords: grammar checker, spell check, punctuation fix, writing assistant, content quality, SEO writing tool.

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