Proofreading tool

Non-Generative AI Grammar Checker (Free)

Paste an English draft for a private, rule-based review. The checker runs on your device and combines six practical checks into one editing list.

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What this tool checks

A focused signal for your next edit.

Some students and writers want a proofreading pass without sending unpublished work to a language model. This tool combines local dictionary and pattern checks so you can catch common mechanical issues while keeping the draft in your browser.

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No generative AI or text upload

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Six rule-based checks in one pass

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English dictionary suggestions

Practical uses

Use the result as a review list.

  1. Proofread an essay or application response before submission.
  2. Review sensitive or unpublished writing without uploading it to an AI service.
  3. Create a short editing checklist before checking the final draft against a required style guide.

Questions

Before you use the result.

Does this grammar checker use AI?

No generative AI or language model is used. The page applies a local English dictionary and transparent pattern rules in your browser.

Is my essay uploaded or stored?

No. Your text stays in the browser on your device. Analytics can record that the tool was used, but never the text you enter.

What grammar problems can it find?

It checks possible misspellings, common punctuation and capitalization patterns, adjacent duplicate words, sentences over 30 words, and likely passive constructions. It does not claim to understand every grammar rule or sentence meaning.

Need AI detection too?

Check text, images, and audio in the mobile app.

Use these free browser tools for mechanical review, then use Stealth AI Detector when you need AI and human probability signals.

Download on the App StoreGet it on Google Play