Free to use
Tunnel your localhost
to the world
Expose your local development server to the internet with a single command. Custom subdomains. No deploy needed.
Terminal
# Install and start tunneling in 3 steps
$ npm install -g prevbox
$ prevbox auth
$ prevbox serve http 3000
# → Tunnel registered!
# → URL: https://swift-fox-42.previewbox.dev
# → Tunnel is active. Press Ctrl+C to stop.Instant Sharing
One command to expose your local server. Share with teammates, clients, or test webhooks — no deployment needed.
Custom Subdomains
Choose your own subdomain or let us generate one. Your projects get memorable, branded URLs on your wildcard domain.
Secure by Default
WebSocket-based tunnels with encrypted connections. Your traffic stays between you and the server — nothing in between.
How it works
Three steps from localhost to public URL
Install the CLI
npm install -g prevboxAuthenticate
prevbox authStart tunneling
prevbox serve http 3000Ready to start tunneling?
Create your account and expose your first project in under a minute.