Password Breach Checker
Check if your password has been exposed in known data breaches. Your password is never sent to our servers - we use secure K-anonymity technology.
Check Your Password Security
Enter your password below to check if it has been compromised in any known data breaches.
How It Works
- Step 1: Your password is hashed locally using SHA-1
- Step 2: Only the first 5 characters of the hash are sent to HaveIBeenPwned
- Step 3: We search through thousands of hash suffixes locally
- Step 4: Results are displayed without revealing your password
Privacy & Security
- K-Anonymity: Your actual password is never transmitted
- No Logging: We don't store any search queries or results
- Client-Side: Password hashing happens in your browser
- Trusted Source: Data from HaveIBeenPwned by Troy Hunt
Frequently Asked Questions
Yes, it's completely safe. Your password is hashed locally in your browser using SHA-1, and only the first 5 characters of this hash are sent to the HaveIBeenPwned API. This technique, called K-anonymity, ensures your actual password never leaves your device.
HaveIBeenPwned is a service created by security researcher Troy Hunt that allows you to check if your personal data has been compromised in data breaches. It contains over 600 million compromised passwords from various data breaches.
If your password appears in a breach, you should immediately change it on all accounts where you use it. Consider using a password manager to generate and store unique, strong passwords for each account. Enable two-factor authentication wherever possible.
The HaveIBeenPwned database is regularly updated as new breaches are discovered and verified. This tool checks against the most current version of the database each time you perform a search.