Data Breach Checker — free
Check if your password has appeared in known data breaches using k-anonymity.
Privacy Protected (k-Anonymity)
Only the first 5 characters of your password's SHA-1 hash are ever sent. Your actual password and full hash stay in your browser.
How to use Data Breach Checker
Enter your password in the input field
Locate the text box labeled 'Enter Password to Check' on the main page. Click inside the field and type your password. The field accepts up to 128 characters. Do not paste or share your actual passwords with anyone else.
Click the 'Check Password' button
After entering your password, locate the blue 'Check Password' button directly below the input field. Click it once. The tool will begin processing your request immediately without storing any data.
Review your breach status results
Within 2-3 seconds, results will display below the button. A green checkmark with 'Safe' means your password was not found in known breaches. A red warning with 'Compromised' means change your password immediately on affected accounts.
Check additional breaches if needed
To check another password, clear the input field using the 'X' icon or select all text and delete it. Enter your next password and click 'Check Password' again. You can perform unlimited checks without registration.