Password generator
This tool generates random text suitable for use as a password or key. The text is generated locally in your browser and uses a cryptographically secure randomness generator.
Passphrase
A passphrase is recommended when it needs to be remembered by a human. At the same time, it provides enough security for almost all use cases.
The passphrase here has an entropy of 77 bits, and follows the EFF's recommendations.
Password
This password has an entropy of 130 bits. It is suitable as an encryption key.