Tab Desktop vs CodeSandbox
CodeSandbox moved from browser-based sandboxes to cloud development environments: your project runs in a virtual machine on their infrastructure and the browser is a window onto it. Tab Desktop keeps everything in the tab. Both give you a URL to share; where the computer is differs.
CodeSandbox: CodeSandbox provides cloud development environments backed by microVMs, with a web editor, VS Code integration, live collaboration and a large library of shareable sandboxes.
Side by side
| Tab Desktop | CodeSandbox | |
|---|---|---|
| Where your code runs | In your browser tab, on WebAssembly. No server runs your code. | In a cloud virtual machine; the browser connects to it. |
| Runtimes | Node.js, PHP, Python, TypeScript, SQLite and a Postgres-compatible database, git — in the tab. | Anything a Linux VM can run, including Docker-based setups. |
| Install / sign-up | Nothing to install; no account needed to start. | Nothing to install; an account is required. |
| Starting a project | Seconds: the runtime is already in the page. | A VM boots or resumes; sandboxes can be forked from templates. |
| Offline | Works offline once loaded. | Needs a connection to the VM. |
| Collaboration | Share a public URL of a running server; no live multi-cursor editing. | Live collaborative editing is a core feature. |
| Privacy | Files stay on your device. | Files live on CodeSandbox's infrastructure. |
| Cost | Free; a paid plan adds cross-device sync of connected drives. | Free tier with VM-hour and team-based paid plans. |
Pick CodeSandbox when
- You need a real Linux VM — Docker, system packages, native toolchains
- Live pair-programming in the same workspace matters
Pick Tab Desktop when
- You want zero sign-up and zero boot time
- The code must not leave your machine
- You work offline or on a flaky connection
Questions
Is a VM more capable than a browser tab?
For system-level work, yes: Docker and native binaries need a VM. For web projects, a tab running real Node.js or PHP covers the everyday case and starts instantly.
Can both share a running app?
Yes. Tab Desktop publishes a dev server with one click (browser-to-browser over WebRTC where possible); CodeSandbox exposes VM ports on preview URLs.