ngrok3.39.13

Expose a local application or system through a reachable ngrok endpoint, allowing other people and services to connect without changing the application’s code. Its programmable network edge routes that traffic through ngrok Cloud Edge, where connectivity, security, and observability can be applied before requests reach the underlying service. Secure tunnels provide immediate access to systems without dynamic DNS, port forwarding, or VPNs.

Developers commonly use ngrok to test webhook callbacks, share work-in-progress services, demonstrate local applications, and let remote systems reach development environments. Operations teams can also use tunnels to connect privately hosted systems with external clients or services while keeping the application itself unchanged. Edge-based inspection and visibility help users understand incoming requests and monitor how their exposed services are being reached.

ngrok runs on Linux and is categorized as Security & Privacy software, with an open-source license. The current v3 agent is the default release track, while the “latest” track remains on the v2 agent for legacy customers and may be deprecated in the future. That split matters when choosing an agent version for an existing deployment, because v3 represents the current direction while v2 preserves compatibility with older users.