According to AlphaMoat, as of 2026-09, the Chrome extension AI Grammar Checker has 216 users (+3.8% MoM), rated 5 (2 reviews) — ranked #3,101 of 9,324 AI browser extensions, and #265 of 744 in Writing.
What is AI Grammar Checker
Completely free and open source Chrome AI Grammar Check Extension
- Completely free. No subscriptions required. No ads.
- Absolutely safe. AI works on your machine. No data sent to the internet.
- Smart grammar check. Checks full sentences, not only individual words.
- By default, it uses the built-in Gemini Nano in Chrome versions 138 and above, but you can switch it to a local Llama server.
Installation instructions: https://github.com/nucleartux/ai-grammar?tab=readme-ov-file#installing
Extension profile
User Growth Trend
Popular in Writing
Grammarly for Chrome helps you write with confidence. Get AI support for grammar, clarity, and tone, from first draft to final edit.
+ Compare
Improve your writing - Detect and Humanize AI content, create images, Paraphrase, Check Grammar, AI Chat, and more!
+ Compare
Instantly Enhance Your Texts with LanguageTool’s Grammar Checker and Paraphrasing Tool
+ Compare
Unlock your potential with Wordtune's free AI writer – paraphrase, rewrite, translate, fix grammar, and more.
+ Compare
Improve your English communication with Ginger's all-in-one AI spelling and grammar checker!
+ Compare
Write emails & messages, chat with page, improve writing, translate, and do much more. Powered by the most intelligent AI models
+ CompareData month: 2026-09 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.