LeakCheck – Check and Monitor Passwords & Accounts for Data Breaches! Discover LeakCheck, the user-friendly Windows software for protecting your digital identity. With LeakCheck, you can securely check your passwords and email addresses for known data breaches – quickly, intuitively, and directly on your PC, without any sensitive data leaving your system.

A special highlight: the integrated password check. LeakCheck securely matches your passwords against the Have I Been Pwned database and instantly shows whether your credentials have been compromised. This allows you to identify risks early and take action in time. With the Professional Edition, you also benefit from automatic monitoring of your passwords and email addresses – whenever a new data breach is detected, LeakCheck opens automatically and notifies you immediately.

Securely check passwords – thanks to k-anonymity
A special feature: the secure k-anonymity check method. Your passwords are never transmitted in plain text – instead, only an anonymized hash fragment is sent to the Have I Been Pwned API. This ensures reliable results without compromising your security. Whether simple or complex passwords – LeakCheck checks all entries quickly and reliably against millions of known data breaches.