GemType
Open-source grammar checker and text rewriter powered by your own Gemini API key.
Free browser extension and desktop writing assistant powered by your own API key.
GemType is a free, open-source writing assistant that checks grammar, fixes spelling, and rewrites text on any website or desktop application. It is designed for students and researchers who want AI writing help without paying expensive subscription fees or sending data to third-party servers.
What it is
The tool integrates into Chrome, Edge, Firefox, Microsoft Word, and your desktop OS to provide live spelling and grammar underlines. Selecting text opens a floating toolbar to improve, shorten, or change the tone of your writing using Google's Gemini API.
Who it's for
It suits students, researchers, and writers who need advanced grammar checking and tone adjustments across the web and desktop apps. It does not suit users who want a zero-configuration tool or those without a Google AI Studio account.
Key features
Live Grammar Checking
Underlines appear automatically in text fields a second after you stop typing.
Sentence Re-Verification
Accepted fixes automatically trigger a re-check of the surrounding sentence.
Multi-Surface Support
Runs in browsers, Microsoft Word, and natively across your entire desktop via a hotkey.
Custom Rewrite Toolbar
Instantly improve, fix, shorten, or adjust text tone from a floating menu.
Bring Your Own Key
Connects directly to your Google Gemini API key with no middleman server tracking your text.
Up and running in 3 steps
Our honest verdict
What's great
- No subscription fees or paywalls for advanced rewriting features.
- Sends your text directly to Google's API without routing through third-party servers.
- Works across multiple browsers, Microsoft Word, and native desktop applications.
- Automatic sentence verification ensures fixes do not break surrounding grammar.
Where it falls short
- Requires you to create a Google AI Studio account and generate an API key.
- Desktop app installations are currently unsigned and require manual security bypasses.
- Does not support Google Docs due to platform limitations.
Pricing & license
GemType is entirely free and open source under the Apache 2.0 license. The only requirement is a Google Gemini API key, which operates well within Google's generous free tier for individual writing tasks.
Open remote AI-training roles
870 open remote AI-training roles, updated November 14, 2026; most pay $20–$170 an hour. Zekai lists them free; the application goes to the employer’s platform.
Alternatives
Use it, or have us set it up
FAQ
Does GemType store my text?
No. Your text goes directly from your browser or app to Google's Gemini API using your personal key.
Is it really free?
Yes. The software is open source, and Google's free tier for the Gemini API easily covers normal daily writing volumes.
Can I use it in Google Docs?
No. Google whitelists specific vendors for Docs, so extensions cannot inject checking overlays there.
