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Check If Your Data Has Been Exposed
Data breaches happen constantly—major companies like LinkedIn, Adobe, and Dropbox have all had user data stolen. This tool lets you check if your email address or username appears in known data breaches.
How It Works
Enter your email address or username, and the tool queries databases of known breached credentials. If your information appears in a breach, you'll see which incidents exposed your data and when they occurred.
What To Do If You're Breached
- Change passwords immediately for any affected accounts
- Enable two-factor authentication on all important accounts
- Use unique passwords for each service (a password manager helps)
- Monitor your accounts for suspicious activity
Frequently Asked Questions
Common questions about the Free Breach Check Tool
Our breach checker queries multiple independent breach databases to check if your email has appeared in known data breaches. For password checks, we use a privacy-preserving technique called k-anonymity — your actual password is never sent. Only the first 5 characters of its hash are used to query the database, and the matching happens entirely in your browser.
ℹ️ Disclaimer
This tool is provided for informational and educational purposes only. All processing happens entirely in your browser - no data is sent to or stored on our servers. While we strive for accuracy, we make no warranties about the completeness or reliability of results. Use at your own discretion.