Have I Been Pwned? - Check Guide
Learn how to check if your email or password has been exposed in a data breach.
About This Tool
Learn how to check if your email or password has been exposed in a data breach. All operations are performed entirely in your browser for maximum security. No data is ever sent to any server.
Security Notice: This tool uses
crypto.getRandomValues(), a cryptographically secure random number generator built into your browser.
Frequently Asked Questions
Is Have I Been Pwned safe to use?
Yes. The service uses a technique called k-anonymity where only the first 5 characters of your password hash are sent, never the full password.
What should I do if my password was breached?
Change it immediately on all sites where you used that password. Use a unique password for each site.