Your password never leaves this device. We use k-Anonymity technology: your browser converts the password into a SHA-1 hash, and we only send the first 5 characters to the server. It is impossible for anyone to know your actual password.
When should you check?
Old Accounts
Have you been using the same password for years? Chances are, it's already in the hands of hackers.
Password Reuse
If you use the same password for email and pizza delivery — a breach at the pizza shop exposes everything.
Suspected Breach
Received a strange login notification? Check if your password has become public knowledge.
Need a secure QR code for business or personal use?
Use our completely free generator.
Expert Email Breach Check
If checking your password isn't enough, use the Identity Leak Checker by the Hasso Plattner Institute (Germany).
This is the academic standard for darknet monitoring. To prevent reconnaissance attacks, HPI sends the detailed report **only to your verified email address**.