croc
Open-source command-line tool that sends files between any two computers with a code phrase, resuming if interrupted.
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- Alternatives ranked
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About croc
croc is a command-line file transfer tool written in Go by Zack Scholl. Like Magic Wormhole, you run `croc send` on a file or folder, share the generated code phrase, and the recipient runs croc with that phrase to receive it. Transfers are end-to-end encrypted using a password-authenticated key exchange, go through a relay so they work behind firewalls and NAT, and can resume if the connection drops. It ships as a single binary for Windows, macOS, Linux and BSD with no runtime dependencies, works over IPv6, can send text and multiple files at once, and lets you run your own relay if you don't want to use the public one. It is MIT-licensed and free. It suits developers and sysadmins who often move files between laptops and servers, but a terminal tool is a hard sell for non-technical recipients.
Best for: Developers and sysadmins sending files between machines from the command line.
Pros and cons
What works
- Single binary with no dependencies
- Resumes interrupted transfers
- Can run your own relay
Why people leave
- Command-line only
- Recipient must install croc too
- Default public relay is run by the author
Top croc alternatives
See all 4- 1
Magic Wormhole66.5The original code-phrase transfer tool, with a published protocol.
- 2
LocalSend62.6Graphical app for devices on the same network.
- 3
Blip59.6Desktop and mobile app with unlimited sizes and resume, no terminal needed.
- 4
WinSCP57.2Graphical SFTP for servers you can already log in to.
Why people left croc
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croc: common questions
Is croc free?
Yes. croc is free, open-source software that you can host yourself.
Is croc open source?
Yes. The source code is on GitHub at schollz/croc. You can also run it on your own server.
What platforms does croc run on?
croc is available for Windows, macOS and Linux.
What are the best alternatives to croc?
The highest-ranked croc alternatives right now are Magic Wormhole, LocalSend and Blip. See the full ranked list for pricing, platforms and verified facts.