Cactus
Has your password been breached?
Check a password against billions of credentials exposed in known data breaches. Your password is hashed in your browser and never leaves your device.
Frequently asked questions
How do I know if my password has been leaked?
Enter it here. We check it against billions of leaked passwords privately - your password is hashed in your browser and never sent to us in full (k-anonymity).
Is it safe to type my password into this checker?
Yes. Your password never leaves your device in full; only a short, hashed prefix is sent, so we never see your actual password.
What should I do if my password was breached?
Change it immediately on that site and anywhere you reused it, turn on two-factor authentication, and switch to a unique passphrase.