What is an AI grammar checker?

An AI grammar checker uses artificial intelligence to analyze your text and fix grammar, spelling, punctuation, and style errors. It provides instant corrections and suggestions to improve your writing.

Is GrammarPro free to use?

Yes! GrammarPro offers 3 free grammar checks per day (5 with a free account) for texts up to 500 words. Upgrade to Pro for unlimited grammar checks and 5,000 word limit.

What types of errors does it catch?

GrammarPro catches grammar errors, spelling mistakes, punctuation issues, clarity problems, and more. Our 6 modes cover: Grammar, Spelling, Punctuation, Clarity, Formal Tone, and Concise Writing.

How accurate is the AI grammar checker?

Our grammar checker uses advanced AI (GPT-4o-mini) to provide highly accurate corrections. It understands context, catches subtle errors, and preserves your original meaning and voice.

Does it work with languages other than English?

Yes! GrammarPro supports multiple languages including Spanish, French, German, Chinese, Japanese, and Portuguese. Check our language-specific pages for details.

Is my text stored or shared?

No. We do not store the text you submit for checking after processing is complete. Your text is sent to our AI for analysis and immediately discarded.

Is GrammarPro a good Grammarly alternative?

Yes! GrammarPro offers 6 checking modes free — including clarity, tone, and conciseness features that require Grammarly Premium ($30/month). Try our Grammarly alternative comparison page for details.

Can I use GrammarPro for ESL learning?

Absolutely. GrammarPro catches common ESL mistakes like article errors, preposition misuse, and tense confusion. It's a great tool for non-native English speakers learning to write better English.

Does GrammarPro check resumes and cover letters?

Yes. Use Grammar mode to catch errors, Formal Tone mode for professional language, and Concise Writing mode to eliminate wordiness in your resume or cover letter.

AI Grammar Checker — Free Online AI Correction

Fix grammar, spelling, and punctuation instantly with AI. 30+ languages, 6 checking modes. No signup required.

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Text to Check

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Corrected Text

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GrammarPro is a free AI-powered grammar checker that identifies and corrects spelling, punctuation, grammar, and style errors in real time. It supports over 30 languages including English, Spanish, French, German, Chinese, and Japanese. Users can choose from six checking modes — Grammar, Spelling, Punctuation, Clarity, Formal Tone, and Concise Writing — to target specific aspects of their writing. The tool processes up to 500 words per request with instant inline corrections and explanations for each suggested change. GrammarPro requires no signup, no downloads, and no credit card. It runs entirely in the browser on any device. The AI engine is powered by GPT-4o-mini for high-accuracy contextual corrections that preserve the writer's original voice and meaning.

How It Works

1

Paste Text

Paste or type your text into the editor. Up to 500 words free, 5,000 with Pro.

2

Choose Check Type

Select from 6 checking modes: Grammar, Spelling, Punctuation, Clarity, Formal, or Concise.

3

Get Corrected Text

Click Check Grammar and get your corrected text instantly with all errors fixed.

Features

6 Check Modes

Grammar, Spelling, Punctuation, Clarity, Formal, and Concise — cover every aspect of your writing.

Real-Time Corrections

Watch your text get corrected word by word in real-time with streaming output.

AI-Powered Accuracy

Powered by advanced AI that understands context and catches subtle errors other tools miss.

Free & No Signup

Use our grammar checker immediately. No account or credit card needed.

Spelling & Punctuation

Dedicated modes for spelling corrections and punctuation fixes beyond basic grammar.

Clarity Improvements

Go beyond error fixing — improve readability, formality, and conciseness.