Password Breach Checker
Check if your password was exposed in data breaches. Uses HIBP API with k-anonymity — your password is never sent.
#password#breach#hack#pwned#hibp#security#safe
Loading tool...
How to use
- 1Enter the password to check
- 2The tool hashes it with SHA-1
- 3Only the first 5 chars of the hash are sent to HIBP API
- 4Comparison happens client-side — your password never leaves your device
Frequently Asked Questions — Password Breach Checker
What is k-anonymity?+
A security technique: the tool only sends the first 5 chars of the SHA-1 hash. The server returns a list of similar hashes, then your device compares locally without revealing the real password.
What is HIBP?+
"Have I Been Pwned" — a public database containing billions of passwords from global data breaches.