whatport is a command-line utility that identifies processes listening on TCP or UDP ports and can terminate them to free those ports. It supports agent-friendly JSON output when piped and is intended for developers and system administrators.
whatport sits in PulseGate's CLI tools & terminal category. It focuses on identifying and stopping processes that occupy TCP or UDP ports. whatport is an open-source project aimed at developers and system administrators. whatport is open source under the MIT license. It runs on the command line, and it can be self-hosted.
rvben builds and maintains whatport, and it first shipped in 2026. The project is developed in the open on GitHub with 5 commits in the last 90 days. Among its 5 catalogued features are port process lookup, TCP port support, and UDP port support.
Summary written by a language model from the project’s public pages.
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