Password Strength & Breach Checker
Check how strong a password is and whether it has appeared in a known data breach. Everything runs in your browser — your password is never sent anywhere.
Checking against known breach databases…
Want your whole organization protected, not just one password?
Decoding IT's managed cybersecurity services cover password policy enforcement, MFA rollout, and ongoing breach monitoring across your entire company.
Privacy note: this tool never transmits your password. Strength is scored locally, and breach exposure is checked using the Have I Been Pwned k-anonymity API — only the first 5 characters of a SHA-1 hash of your password ever leave your browser, which is never enough to reconstruct it.