Password Breach Checker - Check if Your Password is Compromised

Verify if your passwords have been exposed in known data breaches. Get immediate alerts and security recommendations.

🔒 Check Password Security

Privacy Guaranteed: We use secure hashing (SHA-256) to check your password. Your actual password is never sent to our servers or stored anywhere.
This tool checks if your password has appeared in publicly known data breaches.

What is a Data Breach?

A data breach occurs when sensitive information is leaked, stolen, or exposed to unauthorized parties. When your password is part of a data breach, it becomes publicly available and can be used by attackers to gain unauthorized access to your accounts.

Why Check if Your Password is Breached?

Checking if your password has been compromised is critical for several reasons:

  • Account Protection: Exposed passwords put your accounts at immediate risk of compromise
  • Identity Theft Prevention: Breached passwords can lead to identity theft and financial fraud
  • Proactive Security: Early detection allows you to change compromised passwords before they're exploited
  • Compliance: Many organizations require password breach checks as part of security policies
  • Peace of Mind: Verify your password security and take action if needed

How Our Password Breach Checker Works

Our tool uses several security measures to check your password:

  1. Secure Hashing: Your password is hashed using SHA-256 before checking
  2. Breach Database Search: Compares the hash against millions of known breached passwords
  3. Privacy Protection: Original password never leaves your browser
  4. Immediate Results: Get instant feedback on password security status
  5. Security Analysis: Comprehensive strength and vulnerability assessment

What to Do if Your Password is Breached

If we detect your password in a breach:

  • Change Immediately: Create a new, strong password for that account
  • Check All Accounts: If you reused the password elsewhere, change those too
  • Enable 2FA: Add two-factor authentication for extra security
  • Monitor Accounts: Watch for suspicious activity on all your accounts
  • Use Unique Passwords: Never reuse passwords across multiple accounts
  • Consider Password Manager: Generate and store unique passwords securely

Password Security Best Practices

  • Never Reuse Passwords: Use unique passwords for each account
  • Use Strong Passwords: At least 12-16 characters with mixed character types
  • Regular Checks: Periodically check if your passwords have been breached
  • Enable 2FA: Two-factor authentication adds an extra security layer
  • Password Manager: Use a reputable password manager for better security
  • Stay Informed: Monitor news about major data breaches
Important: Even if your password is not found in our breach database, it's still essential to use strong, unique passwords and enable 2FA whenever possible.

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About Password Breach Checker

The Password Breach Checker is a security tool that allows you to verify if your passwords have been compromised in known data breaches without sending your actual password to our servers.

Using the k-anonymity model and cryptographic hashing, our tool securely checks your password against a database of over 10 billion compromised passwords collected from thousands of data breaches. Here's how it works:

  • Your password never leaves your device - We only send a partial hash of your password
  • Industry-standard security - Uses the same technology as major password managers
  • Comprehensive database - Checks against billions of leaked passwords
  • Regular updates - Our breach database is updated regularly with new leaks

If your password is found in a breach, we strongly recommend changing it immediately on all accounts where it's used, and enabling two-factor authentication where available.

Password Breach Checker FAQs

Yes, it's safe. Your password is never sent to our servers. We use a k-anonymity model where only the first 5 characters of a SHA-1 hash of your password are sent to our API. This allows us to check if your password appears in breaches without knowing your actual password.

If your password appears in a breach, you should: (1) Change that password immediately on all sites where you use it, (2) Create a unique, strong password for each account, (3) Consider using a password manager, and (4) Enable two-factor authentication where available.

Our breach database is updated regularly as new data breaches are discovered and verified. We use the HaveIBeenPwned API which is one of the most comprehensive and up-to-date databases of breached passwords available, containing over 10 billion unique compromised passwords.