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DevTunnel is a Microsoft-maintained developer utility designed to create secure, internet-facing tunnels for locally hosted web services, enabling teams to share work-in-progress applications without deploying to a public server. By issuing a transient, authenticated URL that maps directly to a port on the developer’s machine, the tool lets stakeholders test APIs, view UI changes, or run webhooks from remote devices, CI pipelines, or partner services while the code still resides in the local environment. Typical use cases include mobile developers debugging backend calls from physical devices, front-end engineers demonstrating features to designers, and DevOps staff validating SaaS integrations before a production release; enterprise policies can be enforced through Azure Active Directory sign-in and configurable access expiration to ensure that only approved reviewers reach the tunnel endpoint. The program belongs to the “Web Development – Testing & Debugging” category and is distributed as a lightweight cross-platform CLI whose current stable release is version 1.0.1516.39294; nineteen incremental builds have been published since the initial launch, each refining connection resilience, telemetry controls, and command syntax. Because the tunnel is relayed through Microsoft’s global edge network, NAT traversal and firewall restrictions are handled automatically, and traffic is encrypted end-to-end with TLS 1.3 without requiring manual certificate management. DevTunnel is available for free on get.nero.com, with downloads provided via trusted Windows package sources such as winget, always delivering the latest version and supporting batch installation of multiple applications.
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