To test a website that you’re developing on your local computer on a mobile device such as a phone or tablet use ngrok.

This is the way to do it:

1. Start up ngrok: $ ngrok http my-dev-site.local:80

   This will start up ngrok and give you a “Forwarding” URL such as `http://24f55bf5.ngrok.io`.

   In this case, it will direct all traffic to that URL to http://my-dev-site.local. If you run
   your website on a different port, such as http://localhost:8888, then use $ ngrok http 8080
   instead.

2. If your website’s base url is configured in a config file, then update it to be the Forwarding URL.
3. Go to the Forwarding URL (http://24f55bf5.ngrok.io, in this example) on your mobile and test!

It’s not hard to do this, but this will save me having to look it up next time!

Source: AKRABAT