Test the strength of a password with the safe and open-source tool zxcvbn developed by Dropbox and used by Bitwarden.
And also learn if it has been the subject of a data leak listed by Have I Been Pwned.
(No data collected, everything happens locally in your browser).
0 = 0-27 bits : Very low. The password is too easy to guess.
1 = 28-35 bits : Low. The password is vulnerable to brute force attacks.
2 = 36-59 bits : Medium. The password offers moderate security.
3 = 60-127 bits : Strong. The password is hard to guess.
4 = 128 bits et plus : Very strong. The password is extremely secure.