Typlx
Typlx is an open-source, privacy-first grammar checker that works locally and offline.
What Typlx is
Typlx is an open-source, privacy-first grammar checker that works locally and offline. It provides Chrome and Firefox extensions, including support for Chromium browsers such as Chrome, Brave, Edge, and Arc, plus an iOS keyboard app. Users can add names, technical terms, acronyms, and domain-specific words to a personal dictionary and enable or disable individual grammar rules. Typlx does not require an account, and its Free plan costs nothing with free installation and core features. The project says it does not operate its own servers or cloud backend; settings and encrypted API tokens remain stored locally. When users request a correction, selected text is sent to the LLM endpoint they configure, which can include OpenAI, Anthropic, Ollama, LM Studio, or local models. Tokens are encrypted with AES-GCM using a PBKDF2-derived key. Usage analytics are not collected unless users opt in. Android support is still in progress.
Good
- Local grammar checking works offline
- No account required
- Chrome and Firefox extensions
- Personal dictionary and custom rule controls
- Open source under the MIT License
Watch out
- Android keyboard app is still in progress
- Corrections send selected text to configured endpoints
- No dedicated cloud backend is provided
Who it suits
Typlx suits people seeking local, offline grammar checking without an account or subscription. It is useful for browser writers and iOS users who want personal dictionaries and rule controls.
Verdict
Typlx focuses on local writing checks, configurable rules, and privacy controls across browser extensions and iOS. Users should note the Android limitation and that requested corrections use the endpoint they configure.
Plans and prices
From Typlx's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | Free to install · Free core features · No account required |
The facts
Each one read from Typlx's own pages, with the date it was checked.
Where it runs
- Browser extension
- Yeschecked 20 Sep 2026
- Browser support
- Typlx offers Chrome and Firefox extensions, and says its Chromium extension works with Chrome, Brave, Edge, Arc, and other Chromium-based browsers.checked 9 Oct 2026
- Mobile app
- Yeschecked 20 Sep 2026
What it does
- Custom rules
- Users can enable or disable individual grammar rules.checked 9 Oct 2026
- Data storage
- The privacy policy says settings and encrypted API tokens are stored locally and that Typlx does not operate its own servers or cloud backend.checked 9 Oct 2026
- Data transmission
- The privacy policy says selected text is sent to the LLM API endpoint the user configures when they request a correction.checked 9 Oct 2026
- Grammar checking
- The homepage says grammar checking happens locally and works offline.checked 9 Oct 2026
- Integrations
- The privacy policy names OpenAI, Anthropic, and local models as user-configured LLM endpoints; it also mentions Ollama and LM Studio for local models.checked 9 Oct 2026
- License
- The site says Typlx is open source under the MIT License.checked 9 Oct 2026
- Mobile availability
- The site links to an iOS keyboard app and says the Android keyboard app is in progress.checked 9 Oct 2026
- Personal dictionary
- Users can add names, technical terms, acronyms, and domain-specific words to a personal dictionary.checked 9 Oct 2026
- Product
- Typlx describes itself as an open-source, privacy-first grammar checker.checked 9 Oct 2026
- Style suggestions
- Yeschecked 20 Sep 2026
- Support
- The privacy policy directs privacy questions to a GitHub issue or [email protected].checked 9 Oct 2026
- Telemetry
- The homepage says usage analytics are not collected unless the user opts in.checked 9 Oct 2026
- Token security
- The privacy policy says API tokens are encrypted at rest using AES-GCM with a PBKDF2-derived key.checked 9 Oct 2026
Money
- Free plan
- Yeschecked 20 Sep 2026
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