Security ToolsPrivate by design
Password Entropy Calculator
Type a password to calculate its entropy in bits and an estimated brute-force crack time.
How to use this tool
- 1Type a password.
- 2See its entropy and estimated crack time.
- 3Your password never leaves your browser.
Frequently asked questions
What is password entropy?+
Entropy measures how unpredictable a password is, in bits — higher entropy means exponentially more possible combinations an attacker would need to try.
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