✓ 30+ Languages✓ One-Click Fixes✓ On-Device AI Mode✓ Private & Free

Grammar Checker

Check grammar, spelling, punctuation, and style, or rewrite paragraphs naturally using local AI.

Language:

Your Text

36 words · 200 chars

Interactive Corrections

✍️Click "Check Grammar" to start spelling & style checks.Identified errors will be color-coded and clickable for instant correction.

How to use Grammar Checker

Choose your correction method and optimize your writing in seconds.

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Select a Mode

Choose 'Standard Rules' for fast typo and punctuation checking, or 'Deep AI Rewrite' for advanced phrasing edits.

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Input Text & Run

Paste your text or try our sample, select your preferred language/model settings, and click run.

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Review & Apply

Click errors to resolve them individually (Standard Mode), or compare side-by-side and copy the final version (AI Mode).

How Grammar Checker works

Our grammar tool provides two distinct engines to accommodate different proofreading needs. The Standard Rules engine utilizes the LanguageTool API to compare your text against thousands of grammatical, spelling, and stylistic rules. The engine highlights issues with specific color classifications (e.g. spelling vs punctuation) and maps out custom corrections.

The Deep AI Rewrite engine runs a neural network (T5 Transformer model) directly inside your web browser using WebAssembly and Transformers.js. The model parses your text contextually, correcting spelling, punctuation, syntax errors, and phrasing. Since all calculations are done client-side, your data remains fully secure and offline. It splits inputs paragraph-by-paragraph to respect context limits and generates a complete, flowing revision.

Why use this Grammar Checker?

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100% Privacy Focused

No copy-pasting to server databases. AI mode processes sentences entirely on your machine.

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30+ Language Rules

Supports multi-lingual grammar and spelling checks including Spanish, French, Hindi, and German.

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Contextual Rewrite

AI mode doesn't just replace words; it rewrites sentences for native flow and clarity.

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Completely Free

No subscriptions, usage limits, or hidden fees. Use it for essays, emails, or code documentation.

Frequently asked questions

Is this grammar checker free to use?

Yes. It is 100% free, requires no signup, and has no word limits. You can check your grammar as often as you need.

What is the difference between Standard Rules and Deep AI Mode?

Standard Rules (LanguageTool API) is a fast, rule-based checker that highlights specific typos, punctuation mistakes, and stylistic issues, allowing you to click and fix them word-by-word. Deep AI Mode (Local) runs a neural network directly in your browser to understand sentence structure and rewrite your text naturally for improved flow and clarity.

Does this grammar tool run offline or locally?

Yes! Deep AI Mode runs entirely on your device using WebAssembly (via Transformers.js). The model files (Fast or High Quality) download once to your browser cache, and after that, the AI processes your text entirely client-side. No text is sent to any external server in AI Mode.

Is my text secure and private?

Absolutely. Standard Mode uses a public API which discards your text immediately after checking. Deep AI Mode runs completely on your own machine. We do not store, view, or log any of the text you enter.

How do I see what the AI changed?

When you run Deep AI Mode, you can toggle between 'Clean Version' and 'Changes (Diff)'. The Diff view highlights additions in green and deletions in red so you can easily review the corrections.

How do I apply the AI corrections?

After the AI finishes, click the 'Apply to Editor' button in the results column. This replaces your original text with the AI's corrected version. You can then continue editing or switch to Standard Mode to verify it.

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