Check if a password has appeared in any known data breaches using the Have I Been Pwned database. Your password is hashed locally and only the first 5 characters of the hash are sent — your actual password never leaves your browser (k-anonymity model).
Checking if your current passwords have been compromised, auditing password strength as part of a security review, verifying that a newly generated password hasn't appeared in breach databases, or educating users about password reuse risks.
Check if a password has appeared in known data breaches using the Have I Been Pwned API. Uses k-anonymity — your full password is never sent over the network.
🔒 Privacy Note: Your password is hashed locally using SHA-1. Only the first 5 characters of the hash are sent to the API (k-anonymity). Your actual password never leaves your browser.