localtunnel

localtunnel is an open source tool that makes a web server on your computer reachable from the internet. It is useful for sharing work and testing webhooks without changing firewall or DNS settings.

You start your local server, then run the lt command with a port number. The tool returns a unique public address that forwards requests to your local service for as long as the tunnel stays open. The address uses HTTPS. The project also offers an API for tunnels and community clients in other languages.

• Public HTTPS address for a local port
• Command-line tool installed with npm
• Test webhooks against a local service
• Share a work-in-progress site with others

• Developers testing webhooks
• Front-end developers sharing previews
• Teams demoing local builds

localtunnel is open source under the MIT license and is free to use. Installing it requires Node.js. A tunnel stays active only while the command keeps running, so the public address stops working when you close it.