Croc sends files between two computers with a code phrase, resumes if the connection drops, and runs on the major desktops. One binary, no account, encryption between the two ends. The usual author is the developer known as schollz. By default the introduction goes through a public relay.
A public relay sees that a transfer happened and can see IP addresses. It should not see the file if the encryption holds. You can run your own relay. The tool is a terminal program. People who want a window should use LocalSend on the same network or Wormhole’s graphical forks. Say the code in a channel that is not the same path as the file.
Use it when both people can paste a command. github.com/schollz/croc
Croc’s code phrase is a password. A short one shouted across an office is fine for a harmless file and wrong for a spreadsheet of clients. Use a longer phrase when it matters, and prefer your own relay if you do this every day. The public relay is a convenience. Resume works only if you still have the partial file. Do not delete it and then blame the tool.