# lt > Localtunnel exposes your localhost to the world for easy testing and sharing. > More information: . - Start tunnel from a specific port: `lt {{[-p|--port]}} {{8000}}` - Specify the upstream server doing the forwarding: `lt {{[-p|--port]}} {{8000}} {{[-h|--host]}} {{host}}` - Request a specific subdomain: `lt {{[-p|--port]}} {{8000}} {{[-s|--subdomain]}} {{subdomain}}` - Print basic request info: `lt {{[-p|--port]}} {{8000}} --print-requests` - Open the tunnel URL in the default web browser: `lt {{[-p|--port]}} {{8000}} {{[-o|--open]}}`