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A free note-taking software for programmers and Computer Science students

Made by Josh Vickery


Notice: If you're upgrading from Codex v1, make sure to back up your save data (save.json and notes folder) for all of your saves before updating.

Codex is a note-taking app that allows you to save styled and highlighted code snippets in your notes.

Other features:

  • Support for highlighting 190+ programming languages
  • Over 240 code themes
  • Sort your notes into nestable notebooks/folders, customizable icons for notebooks and pages
  • KaTeX math expressions
  • PDF and Markdown exporting


Example screenshot

Other Distributions

Arch Linux: You can install Codex from the AUR with codex-bin (unofficial)

Building Locally

Requires Node.js 16 or higher

pnpm install

pnpm dev # Run the app in development mode with hot reloading
pnpm dir # Only generates folder(s) of the standalone executable, quicker
pnpm dist # Generates all installers/portable archives for your platform


This work is licensed under a CC BY-NC 4.0 license.