Password Breach Check

HaveIBeenPwned k-anonymity scan

Free Online Tool

Password Breach Check — Complete Guide & Instructions

Check your password against the HaveIBeenPwned corpus of billions of leaked passwords — using k-anonymity so only the first five SHA-1 characters leave your device, never the password itself.

How to Use Password Breach Check

  1. 1 Enter a password.
  2. 2 Click Check.
  3. 3 See how many times it has appeared in breaches.

Key Features & Capabilities

  • Billions of breached passwords.
  • k-anonymity — full password never sent.
  • Instant verdict.