Codex is an open-source note-taking application tailored for programmers and computer science students, offering specialized features for integrating and styling code snippets. Developed to address the limitations of generic note-taking apps, Codex provides syntax highlighting, customizable themes, and tools for organizing technical content. Two primary versions exist: the CodeX Team’s Electron-based app and Josh Vickery’s Codex, each with distinct features and development focuses.

CodeX Team’s CodeX Notes

• Platform: Cross-platform (Windows, macOS, Linux) via Electron^2.
• Core Features:
  • WYSIWYG editor with support for code blocks, tables, images, and blockquotes^1.
  • Cloud backup and syncing (using services like Dropbox)^1.
  • Folder-based organization and offline access^2.
  • Built on Editor.js, a block-style editor generating JSON output^5.
• Current Status: Prototype stage (as of 2025), with unstable cloud features^2.
• Ecosystem: Part of a broader CodeX platform including Editor.js, Hawk.so (error tracking), and Capella (image storage)^5.

Josh Vickery’s Codex

• Platform: Desktop (Windows, macOS, Linux) and Arch Linux (via AUR)^3.
• Core Features:
  • Syntax highlighting for 190+ languages and 240+ themes^3.
  • Nested notebooks/folders with customizable icons^3.
  • LaTeX math expressions via KaTeX^3.
  • Export to PDF and Markdown^1.
  • Macro shortcuts for quick code-block insertion (e.g., [cpp] for C++)^1.
• License: CC BY-NC 4.0 (non-commercial use)^3.

Feature	CodeX Team Version	Josh Vickery’s Version
Syntax Highlighting	Basic (Editor.js-based)	190+ languages, 240+ themes
Math Support	Not mentioned	KaTeX integration^3
Export Options	PDF^1	PDF, Markdown^3
Sync	Cloud (unstable)^2	Third-party services (e.g., Dropbox)^1

Getting Started

• Download:
  • CodeX Team: GitHub repository^2.
  • Josh Vickery: Releases on GitHub^3.
• Android: A limited client exists but lacks key features like code-block support^4.

Both versions prioritize code readability and developer-friendly workflows, though Josh Vickery’s iteration offers more advanced customization for technical users^1, while the CodeX Team’s app focuses on seamless cloud integration and broader ecosystem tools^2.