Password Generator

Generate strong random passwords in your browser and check how resistant they are to brute-force attacks. Nothing is sent to a server.

Generate

click generate
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Length: 20

Uppercase (A-Z) Lowercase (a-z) Digits (0-9) Symbols (!@#$)

Strength

Entropy

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Check your own password

Type a password to test its strength

Strength of the password you type will appear here. It never leaves your device.

How strength is estimated

Entropy is calculated as length multiplied by the base-2 logarithm of the character-set size. Higher entropy means more guesses are required to crack the password. Common passwords score low, while a known prefix such as 1234 only reduces the estimate for those characters.