localtunnel

exposes your localhost to the world through a public URL

TLDR

Expose local port

$ lt --port [3000]

Use custom subdomain

$ lt --port [3000] --subdomain [myapp]

Specify local host

$ lt --port [3000] --local-host [192.168.1.10]

Use custom server

$ lt --port [3000] --host [https://tunnel.example.com]

Print incoming request info

$ lt --port [3000] --print-requests

Tunnel to local HTTPS server

$ lt --port [443] --local-https

localtunnel exposes your localhost to the world through a public URL. It creates a tunnel from a public server to your local machine, useful for testing webhooks, sharing work in progress, or mobile testing.No account required; tunnels are ephemeral and close when the client disconnects.

PARAMETERS

--port port

Local port to expose.

-s, --subdomain name

Request specific subdomain. Default is random characters.

-l, --local-host host

Proxy to a hostname other than localhost. Also overrides the Host header.

--host url

Tunnel server URL.

--local-https

Enable tunneling to a local HTTPS server.

--local-cert path

Path to certificate PEM file for local HTTPS server.

--local-key path

Path to certificate key file for local HTTPS server.

--local-ca path

Path to certificate authority file for self-signed certificates.

--allow-invalid-cert

Disable certificate checks for local HTTPS server.

--print-requests

Print basic request info (method and path) for each incoming request.

-o, --open

Open tunnel URL in default browser.

PROGRAMMATIC USE

$ const localtunnel = require('localtunnel');
const tunnel = await localtunnel({ port: 3000 });
console.log(tunnel.url);

CAVEATS

URLs are temporary. Subdomains not guaranteed. Free tier has rate limits. Not for production use. Requires Node.js.

HISTORY

localtunnel was created by Roman Shtylman as a simple alternative to ngrok, providing free tunneling without signup.