Password checker

See how long a password would take to guess, what makes it weak, and whether it appears in known data breaches.

Processed on your device, never uploaded

Password

Check known data breachesSends only the first 5 characters of the password’s SHA-1 hash

The password itself never leaves this device.

Strength and breach results appear here.

Password checker: Strength, and whether it appears in a data breach. Part of the second wave of FlinkTools tools.