ngrok is a globally distributed reverse proxy that creates secure tunnels from public URLs to applications running on local machines or private networks. It solves the common developer challenge of exposing local development servers to the internet for webhook testing, mobile app development, client demos, and collaborative debugging. ngrok provides instant public HTTPS endpoints with valid SSL certificates, eliminating the need for DNS configuration or firewall modifications during development.
The platform offers HTTP, HTTPS, and TCP tunneling with real-time traffic inspection, allowing developers to view headers, bodies, latency, and response details for every request. ngrok supports OAuth, SAML, and OpenID Connect for restricting endpoint access, load balancing across multiple tunnel instances, and structured logging to monitoring platforms like Datadog and CloudWatch. It provides multi-platform CLI tools, Agent SDKs, Docker images, a Terraform provider, and a Kubernetes operator for flexible integration into any development workflow.
ngrok is widely used by developers for local webhook development, QA teams for sharing in-progress work, and organizations needing secure ingress to private networks. It integrates with virtually every development framework and platform, making it a universal tool for bridging local and public networks. While the free tier provides basic tunneling capabilities, paid plans unlock custom domains, persistent endpoints, and enterprise features for teams that need reliable, production-grade tunnel infrastructure.
