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dumbpipecroc
Free

Free to download and use; the source is published on GitHub.

 Free

Free and open source under the MIT licence. A public relay is provided at no cost, and you…

Command line Windows, macOS, Linux, Command line, Web
  • Direct encrypted connection between two machines
  • Works across NATs without opening ports
  • One command each side, with a code phrase instead of accounts or links
  • End-to-end encrypted using PAKE, with no server holding a key
  • Command-line only, with no graphical interface
  • Both machines need the tool installed
  • Falls back to a public relay when a direct connection is impossible
  • Anyone with the code phrase during the transfer window can take the file
Downloadable app Downloadable app, Web application
Open source Open source
License not stated License: MIT
No account needed No account needed
Not stated if it works offline Needs internet

Checked October 2, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.