🔥 codexapp

🚀 Run Codex App UI Anywhere: Linux, Windows, or Termux on Android 🚀

Codex UI in your browser. No drama. One command.

Yes, that is your Codex desktop app experience exposed over web UI. Yes, it runs cross-platform.

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🤯 What Is This?

codexapp is a lightweight bridge that gives you a browser-accessible UI for Codex app-server workflows.

You run one command. It starts a local web server. You open it from your machine, your LAN, or wherever your setup allows.

TL;DR 🧠: Codex app UI, unlocked for Linux, Windows, and Termux-powered Android setups.

⚡ Quick Start

The main event.

# 🔓 Run instantly (recommended)
npx codexapp

# 🌐 Then open in browser
# http://localhost:18923

By default, codexapp now also starts:

cloudflared tunnel --url http://localhost:<port>

It prints the tunnel URL, terminal QR code, and password together in startup output.
Use --no-tunnel to disable this behavior.

Linux 🐧

node -v   # should be 18+
npx codexapp

Windows 🪟 (PowerShell)

node -v   # 18+
npx codexapp

Termux (Android) 🤖

pkg update && pkg upgrade -y
pkg install nodejs -y
npx codexapp

Android background requirements:

1. Keep codexapp running in the current Termux session (do not close it).
2. In Android settings, disable battery optimization for Termux.
3. Keep the persistent Termux notification enabled so Android is less likely to kill it.
4. Optional but recommended in Termux:

termux-wake-lock

5. Open the shown URL in your Android browser. If the app is killed, return to Termux and run npx codexapp again.

✨ Features

The payload.

• 🚀 One-command launch with npx codexapp
• 🌍 Cross-platform support for Linux, Windows, and Termux on Android
• 🖥️ Browser-first Codex UI flow on http://localhost:18923
• 🌐 LAN-friendly access from other devices on the same network
• 🧪 Remote/headless-friendly setup for server-based Codex usage
• 🔌 Works with reverse proxies and tunneling setups
• ⚡ No global install required for quick experimentation
• 🎙️ Built-in hold-to-dictate voice input with transcription to composer draft

🧩 Recent Product Features (from main commits)

Not just launch. Actual UX upgrades.

• 🗂️ Searchable project picker in new-thread flow
• ➕ Inline "Add new project" input inside picker (no browser prompt)
• 📌 New projects get pinned to top automatically
• 🧠 Smart default new-project name suggestion via server-side free-directory scan (New Project (N))
• 🔄 Project order persisted globally to workspace roots state
• 🧵 Optimistic in-progress threads preserved during refresh/poll cycles
• 📱 Mobile drawer sidebar in desktop layout (teleported overlay + swipe-friendly structure)
• 🎛️ Skills Hub mobile-friendly spacing/toolbar layout improvements
• 🪟 Skill detail modal tuned for mobile sheet-style behavior
• 🧪 Skills Hub event typing fix for SkillCard select emit compatibility
• 🎙️ Voice dictation flow in composer (hold to dictate -> transcribe -> append text)

🌍 What Can You Do With This?

| 🔥 Use Case | 💥 What You Get | |---|---| | 💻 Linux workstation | Run Codex UI in browser without depending on desktop shell | | 🪟 Windows machine | Launch web UI and access from Chrome/Edge quickly | | 📱 Termux on Android | Start service in Termux and control from mobile browser | | 🧪 Remote dev box | Keep Codex process on server, view UI from client device | | 🌐 LAN sharing | Open UI from another device on same network | | 🧰 Headless workflows | Keep terminal + browser split for productivity | | 🔌 Custom routing | Put behind reverse proxy/tunnel if needed | | ⚡ Fast experiments | npx run without full global setup |

🖼️ Screenshots

Skills Hub

Chat

Mobile UI

🏗️ Architecture

┌─────────────────────────────┐
│  Browser (Desktop/Mobile)   │
└──────────────┬──────────────┘
               │ HTTP/WebSocket
┌──────────────▼──────────────┐
│         codexapp            │
│  (Express + Vue UI bridge)  │
└──────────────┬──────────────┘
               │ RPC/Bridge calls
┌──────────────▼──────────────┐
│      Codex App Server       │
└─────────────────────────────┘

🎯 Requirements

• ✅ Node.js 18+
• ✅ Codex app-server environment available
• ✅ Browser access to host/port
• ✅ Microphone permission (only for voice dictation)

🐛 Troubleshooting

| ❌ Problem | ✅ Fix | |---|---| | Port already in use | Run on a free port or stop old process | | npx fails | Update npm/node, then retry | | Termux install fails | pkg update && pkg upgrade then reinstall nodejs | | Can’t open from other device | Check firewall, bind address, and LAN routing |

🤝 Contributing

Issues and PRs are welcome.
Bring bug reports, platform notes, and setup improvements.

⭐ Star This Repo

If you believe Codex UI should be accessible from any machine, any OS, any screen, star this project and share it. ⭐