btunnel

btunnel is a reverse proxy service that creates publicly accessible URLs for your localhost server. Instead of being limited to local testing, you can generate a unique web address that routes internet traffic directly to your development environment. This lets you share your work with others, test how your application performs from different locations, and demonstrate features without deploying to a production server.

The tool works by establishing a secure tunnel between your local machine and btunnel's servers. When someone visits your generated URL, their request goes through btunnel's infrastructure and gets forwarded to your local server. The service includes HTTPS encryption, automatic reconnection if your local connection drops, and a web interface to monitor incoming requests and responses. Pro features include custom subdomains and the ability to expose arbitrary TCP ports for game servers or other services.

btunnel is particularly useful for developers who need to share in-progress work with clients or team members, QA testers who need to access local builds from different locations, and anyone who wants to temporarily share files from their computer without using cloud storage. It eliminates the complexity of configuring port forwarding or setting up VPNs for simple sharing and testing scenarios.