Data Breach Checker
Check if your email or password appeared in known data breaches. Uses k-anonymity — only partial SHA-1 hash sent to the API. Powered by Have I Been Pwned. Free, private.
Your email is hashed locally. Only the first 5 characters of the SHA-1 hash are sent to the API. Privacy-preserving by design.
About Data Breach Checker
🔒 Privacy-First
Uses k-anonymity model — only the first 5 characters of your email's SHA-1 hash are sent. The full email never leaves your browser.
🛡️ 850+ Breaches
Powered by Have I Been Pwned's database of 850+ verified data breaches and 13+ billion compromised accounts.
📋 Actionable Results
See exactly which breaches exposed your data, what types of data were compromised, and when each breach occurred.
⚡ Free & Instant
No account, no signup. Just enter your email and see results in seconds. Check as many emails as you want.