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localtunnel exposes your localhost to the world for easy testing and sharing! No need to mess with DNS or deploy just to have others test out your changes.

This repo is the server component. If you are just looking for the CLI localtunnel app, see (


The default localtunnel client connects to the server. You can, however, easily set up and run your own server. In order to run your own localtunnel server you must ensure that your server can meet the following requirements:

  • You can set up DNS entries for your domain.tld and *.domain.tld (or sub.domain.tld and *.sub.domain.tld).
  • The server can accept incoming TCP connections for any non-root TCP port (i.e. ports over 1000).

The above are important as the client will ask the server for a subdomain under a particular domain. The server will listen on any OS-assigned TCP port for client connections.


# pick a place where the files will live
git clone git://
cd localtunnel-server
npm install

# server set to run on port 1234
bin/server --port 1234

The localtunnel server is now running and waiting for client requests on port 1234. You will most likely want to set up a reverse proxy to listen on port 80 (or start localtunnel on port 80 directly).

use your server

You can now use your domain with the --host flag for the lt client.

lt --host http://sub.example.tld:1234 --port 9000

You will be assigned a URL similar to

If your server is acting as a reverse proxy (i.e. nginx) and is able to listen on port 80, then you do not need the :1234 part of the hostname for the lt client.


You can deploy your own localtunnel server using the prebuilt docker image.

Note This assumes that you have a proxy in front of the server to handle the http(s) requests and forward them to the localtunnel server on port 3000. You can use our localtunnel-nginx so accomplish this.

If you do not want ssl support for your own tunnel (not recommended), then you can just run the below with --port 80 instead.

docker run -d \
    --restart always \
    --name localtunnel \
    --net host \
    defunctzombie/localtunnel-server:latest --port 3000

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Top Contributors

defunctzombie lukehorvat scandinaro bryanhelmig sidthekidder sidtehkid ReadmeCritic


package version
babel-plugin-transform-async-to-generator 6.8.0
babel-plugin-transform-es2015-modules-commonjs 6.10.3
babel-polyfill 6.9.1
babel-register 6.9.0
bluebird 3.4.1
book 1.3.1
book-git 0.0.2
book-raven 1.2.0
bookrc 0.0.1
debug 2.2.0
express 4.14.0
http-proxy 1.14.0
localenv 0.2.2
on-finished 2.3.0
optimist 0.6.1
tldjs 1.6.2
dev mocha 2.5.3
localtunnel 1.8.0
ws 0.8.0


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