Lexicon

What it does

I built Lexicon, a free, open-source desktop writing assistant. Clean grammar checking and text editing without sending your private drafts to cloud servers or paying monthly subscriptions. A rich editor includes LaTeX math, structured tables, code blocks, and clean PDF/Markdown exports. The app offers proofreading and 15 local text tools (Rewrite, Concise, Tone shifts, Summaries, Tables). It's completely free and open-source under the MIT license.

Lexicon is a free, open-source Grammarly alternative and local-first writing app for Windows, macOS & Linux with offline grammar checking, local AI rewrites, and clean PDF export. No accounts.

A distraction-free desktop editor with local proofreading on demand, local-first Lex rewrites. No account or subscription is required. One private canvas for the whole writing process. The editor is the product. Proofreading, Lex, and export are built in, not bolted on. Headings, lists, tasks, tables, and images, plus / slash commands and local auto-save. Templates for Academic, Novel, Blog, or Executive drafts. One shortcut clears the chrome when you need focus. Run inline checks for spelling, grammar, and style with 1-click Apply. Clarity, readability, and tone update with the check. Built-in checks run on your CPU; external AI servers are optional and user-configured. Highlight a passage…from lexicon-writer.pages.dev

In the maker’s words, at launch

Lexicon is a rich-text editor with grammar checking and AI writing tools (rewriting, tone shifting, and summarizing) that run entirely on your machine. No account, no API calls, and nothing uploaded. Grammar/spelling/punctuation checking runs through LanguageTool locally; the AI tools run through a small…

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