Ngrok is an ingress-as-a-service that provides tunnels facilitating instant ingress to your apps in any cloud, private network, or device. Using Ngrok tunnels you can share your website / app from your localhost. It has many other use cases, such as connecting to IoT devices behind NAT and firewall, receiving webhooks, debugging HTTP requests, and more. Recently, ngrok has expanded its offerings to API gateway, firewall, and load balancing to host on-premise apps and services.