🔥 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.

If you are using a provider or AI gateway that is already authenticated and do not want codexapp to force codex login during startup, use:

npx codexapp --no-login

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.

iPhone / iPad via Tailscale Serve

If you want to use codexUI from iPhone or iPad Safari, serving it over HTTPS is recommended.

A practical private setup is to run codexUI locally and publish it inside your tailnet with Tailscale Serve:

npx codexapp --no-tunnel --port 5900
tailscale serve --bg 5900

Then open:

https://<your-machine>.<your-tailnet>.ts.net

This setup worked well in practice for:

• iPhone Safari access
• Add to Home Screen
• the built-in dictation / transcription feature in the app
• viewing the same projects and conversations from the Windows host

Notes:

• Tailscale Serve keeps access private to your tailnet
• on iOS, HTTPS / secure context appears to be important for mobile browser access and dictation
• some minor mobile Safari CSS issues may still exist, but they do not prevent normal use
• depending on proxying details, authentication behavior may differ from direct remote access
• if conversations created in the web UI do not immediately appear in the Windows app, restarting the Windows app may refresh them

✨ 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
• 🤖 Optional Telegram bot bridge: send messages to bot, forward into mapped thread, send assistant reply back to Telegram
• 💾 Project portability: export a project as a ZIP from project or thread menus, including matching Codex chat JSONL history under .codex-project/chats/
• 📦 Project import: restore exported project ZIPs from the browser via Import Project
• 🔁 Imported chats are rewritten for the destination CODEX_HOME, project path, and currently selected provider/model so they can be resumed in the new environment
• ⚙️ Project ZIP performance: exports stream ZIP bytes with response backpressure handling and skip generated/git-ignored folders; imports still buffer the selected ZIP once because the browser upload arrives as a single file

Telegram Bot Bridge (Optional)

Set these environment variables before starting codexapp:

export TELEGRAM_BOT_TOKEN="<your-telegram-bot-token>"
export TELEGRAM_ALLOWED_USER_IDS="<your-telegram-user-id>,<optional-second-id>"
export TELEGRAM_DEFAULT_CWD="$PWD" # optional, defaults to current working directory
npx codexapp

TELEGRAM_ALLOWED_USER_IDS is required for safe access. Only allowlisted Telegram user IDs can use the bridge. If no allowed user IDs are configured, incoming Telegram messages are rejected.

To find your Telegram user ID:

1. Send a message to your bot.
2. Run curl "https://api.telegram.org/bot<your-telegram-bot-token>/getUpdates".
3. Read message.from.id from the returned update payload.

Bot commands:

• /start show quick help and thread picker
• /threads list recent threads and pick one
• /newthread create and map a new Codex thread for this Telegram chat
• /thread <threadId> map current Telegram chat to an existing thread
• /current show currently connected thread for this chat
• /history show recent history for current thread
• /status show bridge/mapping status
• /whoami show your Telegram user/chat IDs and authorization state
• /help show command reference

Outgoing assistant messages are sent with Telegram parse_mode=HTML for formatting, with automatic plain-text fallback if HTML delivery fails.

🧩 Recent Product Features (from main commits)

Not just launch. Actual UX upgrades.

• 🗂️ Searchable project picker in new-thread flow
• ➕ "Create Project" button next to "Select folder" with 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?

🖼️ 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

🤝 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. ⭐

Forked from pavel-voronin/codex-web-local by Pavel Voronin.