Encrypted
The complete database is always encrypted with the AES (alias Rijndael) encryption algorithm using a 256 bit key. KeePassXC uses a database format that is compatible with KeePass Password Safe. Your wallet always works offline and requires no Internet connection.
Cross-Platform
KeePassXC is a community fork of KeePassX, the cross-platform port of KeePass for Windows. Every feature is cross-platform and tested to give users the same feel on each operating system, including the loved auto-type feature.
Free
The source code is published under the terms of the GNU General Public License. KeePassXC is and always will be free as in freedom as well as in beer. Contributions from everyone are welcome.