Check if your email or password has been compromised in known data breaches
Data breaches expose millions of email addresses, passwords, and personal information every year. Regular breach monitoring is essential for cybersecurity.
• Yahoo (3 billion accounts, 2013-2014)
• Facebook (533 million users, 2019)
• LinkedIn (700 million users, 2021)
• Adobe (153 million accounts, 2013)
• Equifax (147 million people, 2017)
• Use unique passwords for each account
• Enable two-factor authentication (2FA)
• Use a password manager
• Monitor your accounts regularly
• Never reuse compromised passwords
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.
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.
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.