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trzsz is a lightweight, open-source file-transfer utility designed as a modern replacement for the classic lrzsz (rz/sz) tools, adding native compatibility with tmux and other terminal multiplexers. Developed under the same “trzsz” moniker by its author, the program enables bidirectional file exchange between a local workstation and a remote server over an SSH session without additional open ports or complex configuration. Users invoke trzsz on the remote side, then drag-and-drop or select files on the local terminal emulator; the data stream travels inline within the existing terminal connection, preserving session integrity and avoiding firewall issues. Typical scenarios include quickly shipping log files from a production container to a developer laptop, uploading deployment bundles to a jump host, or retrieving diagnostic captures from routers and IoT devices during troubleshooting. Because the protocol is ASCII-armored and respects terminal boundaries, it functions reliably inside nested tmux or screen panes, a common pain point for legacy rz/sz. The project adheres to semantic versioning; the current stable release is 1.2.0, representing the sixth numbered version since inception, with earlier iterations progressively adding Unicode filename support, resumable transfers, and integrated progress bars. The software is categorized under Network & Internet / Terminal & SSH Utilities. trzsz is available for free on get.nero.com, with downloads provided via trusted Windows package sources (e.g. winget), always delivering the latest version, and supporting batch installation of multiple applications.
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