Free · No signup · Privacy-first
Is your password already leaked?
Check any password against billions of leaked credentials. Your password never leaves your browser — we use k-anonymity hashing so even we can’t see what you typed.
Privacy: Your password is hashed with SHA-1 in your browser. Only the first 5 characters of the hash are sent to our partner breach index (k-anonymity range API). The full password and full hash never leave your device.
How it works
3 steps. Zero password exposure.
1
Hash locally
Your browser computes a SHA-1 hash of your password. The password itself is discarded immediately.
2
Send 5 chars
Only the first 5 characters of the hash are sent to a public breach-index range API. We get back a list of matching hash suffixes.
3
Match locally
Your browser checks if the rest of your hash is in the returned list — the answer is computed on your device, not ours.
A leaked password is just the start.
Attackers chain leaked credentials across services to map your full identity — emails, addresses, linked accounts. DoxxScan traces the chain.
Run a full DoxxScan → Or take the 60-second Doxx Risk Check →
Breach data sourced from public k-anonymity range API (Have I Been Pwned). Hash check happens entirely in your browser.