Discover LeakCheck, the user-friendly Windows software for protecting your digital identity. With LeakCheck, you can securely check your passwords and email addresses against known data leaks – quickly, intuitively, and directly on your PC, without sensitive data leaving your system.

A special highlight: the integrated password check. LeakCheck encrypts your passwords and checks them against the Have I Been Pwned database, immediately showing whether your credentials have been compromised. This way, you can identify risks early and take action in time. In the Professional Edition, you also benefit from automatic monitoring of your passwords and email addresses – if a new data leak is detected, LeakCheck opens automatically and informs you immediately.

Securely check passwords – thanks to k-anonymity

A special highlight: the secure checking method via k-anonymity. Your passwords are never transmitted in plain text – instead, only an anonymized hash part is sent to the Have I Been Pwned API. This way, you receive reliable results without compromising your security. Whether simple or complex passwords – LeakCheck quickly and reliably checks all entries against millions of known data leaks.

Check email addresses for data leaks – simple and clear

With LeakCheck, you can easily add your email addresses to the monitoring list and check them with a click against the Have I Been Pwned database. For each affected address, you can immediately see in which data breaches it has appeared – including name, description, and date of the respective leak. This way, you keep track of all risks and can respond accordingly.