GemType is a free, open-source Grammarly alternative. It underlines mistakes on any website — and in Microsoft Word — then fixes them in one click. Powered by your own free Google Gemini key: no account, no subscription, no tracking.
Wavy underlines appear a second after you stop typing — in Gmail, LinkedIn, X, Reddit, and every normal text field on the web.
Click an underline, accept the correction. Ctrl/Cmd+Z always undoes — and every accepted fix re-checks the whole sentence automatically.
Select any text for a floating toolbar: Improve, Fix, Shorten, Formal, or Casual. Rewrites keep your meaning — corrections keep your wording.
Auto-detects what you're writing — English, Spanish, Bengali, Arabic, Japanese, and anything else Gemini understands.
Your text goes straight from your browser to Google's Gemini API with your key. No middleman server, no analytics, and password fields are never read.
Runs on a free Gemini API key from Google AI Studio — two clicks, no credit card. The free tier comfortably covers daily writing.
One click from the Chrome Web Store or Edge Add-ons.
Grab a free API key at aistudio.google.com/apikey — no credit card — and paste it into GemType's settings.
Type anywhere and pause. Mistakes get underlined; one click fixes them. Select text to rewrite it in any tone.
Most writing assistants route everything you type through their own servers. GemType is built so that it can't — there is nothing in the middle to trust.
The API key lives in your browser's local storage — never synced, never uploaded. It is sent to exactly one place: Google, as authentication on your own requests.
No analytics, no telemetry, no accounts, no cookies. Password, payment, and one-time-code fields are excluded from reading at the code level. It's all in the privacy policy.
GemType is fully open source. Paste this prompt into ChatGPT, Claude, or Gemini and let an AI read every line for you.
Audit this open-source browser extension for me: https://github.com/riponcm/GemType Read the source and answer precisely: 1. Where is the user's text sent? Anywhere other than Google's generativelanguage.googleapis.com? 2. Where is the Gemini API key stored, and where is it transmitted? 3. Is there any tracking, analytics, or telemetry? 4. Are password or payment fields ever read?
The honest version — including the one thing Grammarly does that we don't.
| GemType | Grammarly | |
|---|---|---|
| Price | Free — your own Gemini key | Premium $12–30 / month |
| AI rewrites & tone presets | Included | Premium |
| Sentence re-check after each fix | Automatic | Not available |
| Languages | Any, auto-detected | English + a few variants |
| Account & tracking | None | Account required, telemetry |
| Where your text goes | Straight to Google's API, with your key | Grammarly's servers |
| Open source | Apache-2.0 | Closed |
| Google Docs | Not supported | Supported |
A star genuinely helps other people discover an open, private alternative. It takes five seconds and means a lot.
Star on GitHubReviews are what convince the next person to try it. If GemType helped your writing, say so on the store you use.
Review on ChromeThe Safari build is done — only Apple's $99/year developer fee stands between GemType and Safari users. Sponsors get credited.
Become a sponsorGemType is made by Ripon Chandra Malo, founder of Matily — a small studio with one belief: good software should be free, private, and open to all. GemType started as a browser extension and is growing into a writing assistant that follows you everywhere — Word today, mobile keyboards next.
The code is open under Apache-2.0. Read it, fork it, improve it.
Yes. GemType itself is free and open source, and it runs on your own Gemini API key from Google AI Studio — which has a free tier with no credit card required. For a single person's daily writing, the free tier is more than enough.
Straight from your browser (or Word) to Google's Gemini API, authenticated with your own key. There is no GemType server, no account, and no analytics — we never see your text or your key. Password, payment, and one-time-code fields are never read.
Any website with a normal text field or rich editor — Gmail, LinkedIn, X, Reddit, GitHub, forums, CMS editors — plus Microsoft Word via the task-pane add-in. Google Docs is the one exception: it renders to a canvas and restricts its annotation API to Google-whitelisted vendors.
Yes. GemType auto-detects the language you're writing and checks it with the same model — Spanish, French, German, Portuguese, Bengali, Hindi, Arabic, Chinese, Japanese, and anything else Gemini understands. You can also pin a language in settings.
GemType works where you type: mistakes are underlined in place as you write, fixes apply in one click with native undo, and each fix re-checks the whole sentence. No copy-paste round trips.
Yes — the full source is on GitHub under Apache-2.0. Issues and pull requests are welcome: editor compatibility fixes, translations, and the upcoming mobile keyboards are all great places to help.