Cryptodog is a community-developed fork of the original Cryptocat browser extension, which was discontinued in February 2016.


Cryptodog is experimental software. Do not use Cryptodog if you have a critical need for secure messaging. Instead, use Signal.


The recommended way to run Cryptodog is via our Chrome extension. Using our browser extension ensures you always have the official, most recent version.

If you just want to test out Cryptodog, we have a client hosted on GitHub Pages.


Bug reports are welcome! If you find a bug in Cryptodog, please open an issue on GitHub.

If you believe the issue has a security impact, we would appreciate coordinated disclosure. Please email us at


General queries should be sent to