Password Leak Checker
Securely verify if your password has been exposed in a data breach using zero-knowledge local verification.
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Zero-Knowledge Privacy Guarantee
Your password is never sent over the internet in plain text or full hash format. This tool uses the industry-standard k-Anonymity model via the Have I Been Pwned range API:
1
Your password is hashed locally to SHA-1.
2
Only the first 5 characters are sent to the HIBP API.
3
The API returns hashes matching those 5 characters.
4
Your browser compares them locally to find a match.
Security Scan Console
Enter a password to run a zero-knowledge security diagnostic.
Diagnostic Telemetry
AWAITING INPUT
Enter password above to begin diagnostic
Breach Count
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Risk Level
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Local Hashing Breakdown
SHA-1 Hash:
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Prefix (First 5 characters sent to network)
Suffix (Remaining 35 matched locally in browser)