Key Statistics
Flan-T5 language model AI model
Grammar, spelling, punctuation Error types
100% local processing Privacy
AI Grammar Checker - Free Online Tool
Check grammar, spelling, and punctuation with our free AI-powered tool. The Flan-T5 model identifies errors and provides corrections with explanations. Paste your text, click check, and see highlighted issues with fix suggestions. The AI runs 100% in your browser - your text never leaves your device. First load downloads ~150MB model (cached for future use).0 words
Try a sample:
GrammarSpellingPunctuationStyle
Grammar checking runs locally using Flan-T5 AI model.
Your text is processed in your browser and never uploaded to any server.
What is AI Grammar Checker?
Grammar checking with AI uses machine learning to identify and correct writing errors. This tool uses Flan-T5, a powerful language model that understands grammar rules, spelling conventions, and punctuation standards. It analyzes your text and suggests corrections with explanations to help you learn.
AI grammar checkers are essential for students, professionals, and anyone who writes. They catch errors that spell-check misses, improve writing clarity, and help non-native speakers write more confidently. Unlike basic spell-checkers, AI understands context and grammar rules.
How does AI Grammar Checker work?
- 01 Paste or type your text in the input area
- 02 Click "Load Model & Check Grammar" to start the AI analysis
- 03 On first use, the AI model (~150MB) will download and be cached
- 04 View highlighted errors color-coded by type (grammar, spelling, punctuation)
- 05 Click on each error to see the suggested fix and explanation
- 06 Apply fixes individually or use "Apply All Fixes" for quick correction
- 07 Copy the corrected text to clipboard when done
Why use a browser-based tool?
- Maximum privacy: Your text never leaves your browser or gets sent to any server
- Works offline: After initial model download, check grammar without internet
- No limits: Check unlimited text without API quotas or usage restrictions
- Instant results: No network latency, corrections happen locally on your device
- Free forever: No subscription, no credits, no hidden costs
Common Questions
What types of errors does this catch?
The AI grammar checker identifies grammar errors (subject-verb agreement, tense issues), spelling mistakes, punctuation problems, and common writing issues like "their/there/they're" confusion. Each error is color-coded and includes an explanation.
Is this better than built-in spell check?
Yes, AI grammar checking goes beyond basic spell-check. It understands context, catches grammar errors that spell-check misses (like "I seen that" instead of "I saw that"), and provides explanations to help you improve your writing.
Is my text data uploaded to a server?
No. The entire AI model runs in your browser using Transformers.js and WebAssembly. Your text is processed locally on your device and never transmitted to any server. Safe for confidential documents.
Why is there a download on first use?
The first time you use the tool, it downloads the Flan-T5 model (~150MB) to your browser cache. This one-time download enables all future grammar checks to happen instantly without server communication.
Does it support languages other than English?
This version is optimized for English. The AI may work with other languages but accuracy will vary significantly. For best results, use English text.
Can I undo a correction?
Yes, corrections are applied to your original text. If you apply a fix and want to undo it, simply edit the text box manually or reload the page and paste your original text again.