Is the generated password really random?
Yes. The tool uses your browser's secure random number generator (window.crypto.getRandomValues), the same primitive used by security-sensitive web applications.
Does this send my password to a server?
No. Generation runs 100% in your browser. The password never leaves your device.
What length should I pick?
For most accounts, 16 characters with mixed types is strong. For high-value accounts or master passwords, consider 20 or more characters.
Why exclude similar characters?
If you may need to type the password by hand or read it aloud, excluding I, l, 1, O, 0 reduces confusion. For passwords you only paste, you can leave this off.