Use this page to check if the password you want to use has been previously compromised. This site uses the Have I Been Pwned API which contains over 501 Million passwords obtained through various data breaches. If the password you enter is found, it should not be used!
This site does not store or transmit your password
The code is 100% open soruce.
This site uses the first 5 characters of SHA-1 hash of the password entered, utilizing the k-anonymity aspect of the HIBP API. Once a list of hashes is returned from the API, we locally compare the hashes to see if your password is in the list.