zrok

zrok is an open source tool for sharing applications and files from your computer through secure tunnels. It can make a local service reachable from another network without opening ports on your router.

With zrok you can share a local application through a public or private link. Private sharing keeps your resources away from public endpoints, so only other zrok users you invite can reach them. The tool can also share files and web content, not only HTTP services. All traffic moves over an overlay network built on OpenZiti, which is a zero trust networking project. The same single binary can run as a client or host your own service instance, so the setup can be as small as one device.

• Share a local app with a public or private link
• Share files and web content with other zrok users
• Keep private resources away from public endpoints
• Run the public service or self-host your own
• Build on OpenZiti, a zero trust overlay network

Developers who need to test a webhook or show a local app to someone else will find it helpful. Teams that want private sharing between machines, or who prefer to self-host, will also benefit from the design.

zrok is open source under the Apache 2.0 license. It is available as a hosted service and can also be self-hosted, so you can choose the option that suits your data needs. Sharing a service publishes it to whoever has the link in the public mode, so review access settings before sharing anything sensitive.