Lexicon
Lexicon is a free desktop writing editor focused on local drafting, proofreading, rewriting, and export.
What Lexicon is
Lexicon is a free desktop writing editor focused on local drafting, proofreading, rewriting, and export. Its editor supports headings, lists, tasks, tables, images, slash commands, local autosave, and Academic, Novel, Blog, and Executive templates. A built-in LanguageTool engine checks spelling, grammar, and style locally on the CPU without an AI model. Lex can rewrite, tighten, summarize, or change tone using downloaded GGUF models or a server configured through Ollama or LM Studio. It can turn writing from Chinese, French, German, Hindi, Spanish, and other languages into natural English across six tones. Lexicon imports DOCX, Markdown, TXT, and HTML, then exports PDF, EPUB, styled HTML, or DOCX with tracked grammar suggestions. Drafts and settings remain in the local profile, with no cloud sync, mandatory account, or first-party background telemetry. Desktop versions support Linux, macOS, and Windows, plus a beta browser extension.
Good
- Local spelling, grammar, and style checks
- Multiple writing templates and editing blocks
- Optional Ollama or LM Studio servers
- Imports common document formats
- No mandatory account or cloud sync
Watch out
- Browser extension requires desktop app running
- Extension does not support Google Docs
- Firefox extension is unsigned and temporary-install only
- Desktop builds lack Windows signing and macOS notarization
Who it suits
Lexicon suits writers who prefer keeping drafts on their own devices and want local proofreading or optional local-model rewriting. It supports Linux, macOS, Windows, and a beta Chrome or Firefox extension.
Verdict
Lexicon offers a broad local writing workflow at no cost, from drafting through proofreading and export. Its privacy-focused storage is useful for offline-minded writers, though extension and operating-system packaging limits remain.
Plans and prices
From Lexicon's own pricing page, checked 11 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | No subscription · No account gate · No expiring trial |
The facts
Each one read from Lexicon's own pages, with the date it was checked.
What it does
- AI writing
- Lex can rewrite, tighten, summarize, and shift tone using downloaded local GGUF models or a user-configured Ollama or LM Studio server.checked 11 Oct 2026
- Build signing
- The maker says desktop builds are not yet code-signed for Windows or notarized for macOS, so operating-system security warnings may appear.checked 11 Oct 2026
- Drafting
- The editor supports headings, lists, tasks, tables, images, slash commands, local autosave, and Academic, Novel, Blog, and Executive templates.checked 11 Oct 2026
- Import and export
- Lexicon imports DOCX, Markdown, TXT, and HTML, and exports PDF, EPUB, styled HTML, or DOCX with tracked grammar suggestions.checked 11 Oct 2026
- Integrations
- Lex can connect to Ollama or LM Studio, and the browser extension shares a personal dictionary with the desktop app through local loopback.checked 11 Oct 2026
- Intended users
- The maker describes Lexicon as built for people who prefer not to send drafts to someone else’s server.checked 11 Oct 2026
- Languages
- Express in English phrases writing from Chinese, French, German, Hindi, Spanish, and dozens of other languages into natural English across six tones.checked 11 Oct 2026
- License
- Lexicon-authored code is MIT-licensed, while bundled dependencies and model weights have separate licenses.checked 11 Oct 2026
- Network handling
- Updates and model downloads may use the network, and a server endpoint configured by the user may receive text and prompts sent to it.checked 11 Oct 2026
- Privacy
- Drafts, dictionaries, settings, and writing metrics are stored in the local user profile; Lexicon says it has no cloud sync, mandatory accounts, or first-party background telemetry.checked 11 Oct 2026
- Product
- Lexicon is a distraction-free desktop writing editor with local proofreading, rewrites, and export built in.checked 11 Oct 2026
- Proofreading
- Its built-in LanguageTool engine checks spelling, grammar, and style locally on the CPU, without requiring an AI model.checked 11 Oct 2026
- Style suggestions
- Yeschecked 21 Sep 2026
- Support
- The maker directs users to its Discord for bug reports, feature requests, and community help.checked 11 Oct 2026
- Tone detection
- Yeschecked 21 Sep 2026
Where it runs
- Browser extension
- Yeschecked 21 Sep 2026
- Browser extension limits
- The Chrome and Firefox extension is beta, requires the desktop app to be running, and does not support Google Docs; the Firefox package is unsigned and temporary-install only.checked 11 Oct 2026
- Desktop app
- Yeschecked 21 Sep 2026
- Platforms
- Desktop builds are listed for Windows x64, ARM64, and x86; macOS Apple Silicon and Intel; and Linux x64 as a DEB package.checked 11 Oct 2026
Money
- Free plan
- Yeschecked 21 Sep 2026
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