What Is ngrok? How It Works and How to Use It

ngrok is a reverse proxy that gives a locally running app, API, or webhook endpoint a public URL in seconds, without deploying it or touching your firewall. It runs a lightweight agent on your machine that opens a secure tunnel to ngrok’s cloud, forwarding traffic from a public URL directly to localhost. The post covers what ngrok is, how it works, whether it is safe and free, and how to use it for testing.