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Typlx
What it is
Typlx is an open-source grammar checker that processes checks locally and works offline. It offers a personal dictionary for names, technical terms, acronyms, and specialized vocabulary, plus controls for turning individual grammar rules on or off. Style suggestions are also listed. Browser extensions are available for Chrome and Firefox; the Chromium extension is described as working with Chrome, Brave, Edge, Arc, and other Chromium-based browsers. Typlx also links to an iOS keyboard app, while its Android keyboard app is in progress. The service does not operate its own servers or cloud backend, according to its privacy policy. Settings and encrypted API tokens are stored locally. When a user requests a correction, selected text is sent to the LLM endpoint they configured, which may be OpenAI, Anthropic, or a local model such as one used through Ollama or LM Studio. Usage analytics are not collected unless users opt in. Typlx is free to install, its core features are free, and no account is required.
For and against
For
- Grammar checking works locally and offline.
- Users can customize rules and dictionary terms.
- No account is required.
- Open source under the MIT License.
Against
- The Android keyboard app is still in progress.
- Selected text is sent to the configured LLM endpoint for corrections.
The verdict
Typlx offers free, local grammar checking with custom rules and dictionary entries, while requested LLM corrections send selected text to the configured endpoint. It may suit users who want browser or iOS access without an account.
Who it suits
Typlx suits writers who want offline grammar checks, custom rules, and a personal dictionary. Its browser extensions and iOS keyboard offer options for people writing on those platforms.
Plans and prices
Free
Free to install · Free core features · No account required
Read 9 Oct 2026 · typlx.com
On the record
- Browser extension
- Yestyplx.com · read 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.typlx.com · read 9 Oct 2026
- Custom rules
- Users can enable or disable individual grammar rules.typlx.com · read 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.typlx.com · read 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.typlx.com · read 9 Oct 2026
- Grammar checking
- The homepage says grammar checking happens locally and works offline.typlx.com · read 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.typlx.com · read 9 Oct 2026
- License
- The site says Typlx is open source under the MIT License.typlx.com · read 9 Oct 2026
- Mobile app
- Yestyplx.com · read 20 Sep 2026
- Mobile availability
- The site links to an iOS keyboard app and says the Android keyboard app is in progress.typlx.com · read 9 Oct 2026
- Personal dictionary
- Users can add names, technical terms, acronyms, and domain-specific words to a personal dictionary.typlx.com · read 9 Oct 2026
- Product
- Typlx describes itself as an open-source, privacy-first grammar checker.typlx.com · read 9 Oct 2026
- Style suggestions
- Yestyplx.com · read 20 Sep 2026
- Support
- The privacy policy directs privacy questions to a GitHub issue or [email protected].typlx.com · read 9 Oct 2026
- Telemetry
- The homepage says usage analytics are not collected unless the user opts in.typlx.com · read 9 Oct 2026
- Token security
- The privacy policy says API tokens are encrypted at rest using AES-GCM with a PBKDF2-derived key.typlx.com · read 9 Oct 2026
