Typlx is Now Live: Free, Open-Source Grammar Checking on Chrome, Firefox, Android & iOS
June 29, 2026
We built Typlx because we believe great writing tools shouldn't come at the cost of your privacy. Today, we're announcing that Typlx v2.1.0 is publicly available on the Chrome Web Store, Firefox Add-ons, and as a custom keyboard for Android and iOS — all for free, all open-source.
What Is Typlx?
Typlx is an AI-powered grammar checker that works differently from tools like Grammarly. Instead of sending your text to a remote server, Typlx processes your writing locally. Your words never leave your device. You get intelligent, context-aware suggestions without sacrificing the privacy of your emails, documents, or personal writing.
The entire project — browser extensions, mobile keyboards, and the grammar engine at its core — is open-source on GitHub. You can audit the code, run it on your own infrastructure, or contribute improvements. No black boxes.
What’s in v2.1.0
This release marks our transition from developer beta to public availability across all major platforms.
Browser Extensions
Typlx integrates directly into your browser, providing real-time grammar suggestions in Gmail, Google Docs, Notion, LinkedIn, and any other text field on the web. There's nothing to configure — install the extension and it works everywhere you type.
- Chrome — Available on the Chrome Web Store
- Firefox — Available on Firefox Add-ons
- Edge — Coming soon to the Microsoft Edge Add-ons store
Mobile Keyboards
The Typlx keyboard replaces your default mobile keyboard and adds grammar checking to every app on your phone — not just browsers. Write a text message, draft an email, or compose a tweet and get grammar suggestions as you type.
- Android — Available on the Google Play Store
- iOS — Available on the App Store
Why Open-Source Grammar Checking Matters
Most people don't think about what happens to the text they type into their grammar checker. The answer, for most commercial tools, is: it gets sent to a server, stored, and potentially used to improve future models. That's a reasonable trade-off for some users — but it's the wrong default.
Your writing is personal. A private email to a doctor. A confidential memo to your team. A draft of something you're not ready to share yet. Those words shouldn't be anyone's training data without your explicit consent.
Typlx inverts this model. The grammar engine runs on your device. You can inspect the source code. You can verify for yourself that no data is sent anywhere without your knowledge. We think that should be the standard, not the exception.
How the Grammar Engine Works
Under the hood, Typlx uses a locally-run language model to analyze your text. Unlike rule-based grammar checkers that rely on static dictionaries and hand-crafted rules, our approach understands context. It can distinguish between a correctly used "there" in one sentence and a misused one two words later, and it surfaces suggestions that improve clarity, tone, and flow — not just spelling.
For a deeper technical look, read our post on how Typlx works under the hood.
Free, Forever
The core Typlx experience — real-time grammar suggestions across all platforms — is free. We plan to introduce optional premium features for power users in the future, but the privacy-first, open-source foundation will always be free. Our open-source license (MIT) guarantees it.
Get Started
The fastest path is the Chrome extension: install it in under a minute and start getting suggestions on any website you use for writing.
If you're on mobile, search for Typlx in the App Store or Google Play Store to install the keyboard.
What’s Next
Now that we're live on all major platforms, our focus shifts to quality and community. We want to hear from real users: where does Typlx nail it, and where does it fall short? Open issues on GitHub, reach out on our community channels, or reply to this post.
We're also working on deeper integrations, writing statistics and insights, expanded language support, and tools that help developers write better technical documentation. If any of those sound useful to you, star the repository and follow along.
Your words. Your device. Typlx.