Grammit – Local-only AI grammar checker (Chrome extension)
Hey HN, I wanted a grammar checker that didn’t send my writing to someone's servers, so we built Grammit, a Chrome extension that runs grammar checks locally using an LLM. Your text never leaves your computer during checking. Here’s a 2-minute overview: https://www.loom.com/share/baf501ee6cf14a919a7384128246ed67 Because it uses an LLM, it catches more than spelling and grammar. For example, it can correct some wrong statements like “The first US president was Benjamin Franklin.” Grammit also includes an in-page writing assistant that can rephrase or draft new text. It…
Grammit – Local-only AI grammar checker (Chrome extension) launched on August 28, 2025 with 34 votes, #525 of 8,530 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Grammit is a Chrome extension that checks grammar and writing locally on a user's computer without sending text to external servers. Using a local language model, it catches spelling, grammar, and factual errors while offering an in-page writing assistant for rephrasing and drafting text. The tool is designed for anyone who writes online and wants privacy protection during editing.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hey HN, I wanted a grammar checker that didn’t send my writing to someone's servers, so we built Grammit, a Chrome extension that runs grammar checks locally using an LLM. Your text never leaves your computer during checking. Here’s a 2-minute overview…
Does a similar job
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Grammarly for Chrome2014 · grammarly.com · ▲506Clear, effective, mistake-free writing everywhere you type.
Refine – A Local Alternative to Grammarly2025 · refine.sh · ▲408Fix grammar, rewrite sentences, translate text, and get clear explanations across your Mac apps. Do it all offline with local AI.
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