Audit thousands of passwords against data breaches — completely in your browser with zero-knowledge privacy.

Published: June 9, 2026

TL;DR

Most bulk password checkers require you to upload your entire vault. Utilora’s Bulk Password Breach Checker uses HIBP’s k-anonymity + local hashing so your passwords never leave your device .

The Hidden Risk Most People Ignore

Using a password manager is excellent, but it’s not enough.

Many users unknowingly reuse or slightly modify passwords that have already been leaked in massive breaches (LinkedIn, Adobe, Yahoo, etc.). Manually checking hundreds or thousands of passwords is impractical — which is why people turn to bulk checkers.

The problem? Most bulk checkers ask you to upload your password list .…