Has your password been leaked?

A password breach checker compares your password against databases of passwords exposed in known data breaches. Our password breach checker uses the HaveIBeenPwned database, which contains billions of leaked and hacked passwords collected from real breaches, without ever storing or transmitting your actual password to identify a match.

Our password breach checker uses a technique called k-anonymity, meaning your full password is never sent over the internet. Only a partial hash is checked against the breach database, so your actual password stays private throughout the process. Once you know your password’s strength, you can also test it with our password strength checker.

If a password has been hacked or leaked, it means the password was exposed during a security incident, either directly stolen by attackers or accidentally published, and is now circulating in databases that criminals actively search. A hacked password is no longer private, even if you’ve never noticed any suspicious activity on your account. Attackers often collect leaked credentials quietly and use them later, sometimes months or years after the original breach occurred.

If our password breach checker finds your password in a known breach, change it immediately on every site where you use it, not just the one that was breached. Reused passwords are one of the most common ways attackers gain access to multiple accounts using a single leaked credential.

Not necessarily. A password breach checker can only detect passwords that have appeared in breaches already added to its database. New breaches happen constantly, and some are never publicly disclosed. Using a unique, strong password for every account remains essential regardless of breach checker results.

It’s worth running your important passwords, especially email and banking, through a password breach checker every few months, or immediately after hearing about a major breach affecting a service you use. If you’re managing many accounts, a password manager can help you maintain unique passwords and reduce your overall exposure if one is compromised.

A data breach is a broader security incident where a company’s systems are accessed without authorisation, often exposing usernames, emails, and other personal information alongside passwords. A password leak specifically refers to the passwords themselves becoming publicly available, whether through a breach, malware, or a company’s poor security practices. A password breach checker specifically searches for your password appearing in these leaked datasets, regardless of which company or incident it originated from.

Yes, checking every password you actively use is worthwhile, particularly for accounts holding sensitive information such as banking, email, and healthcare portals. Since passwords are often reused across multiple services, a single exposed password can put several accounts at risk simultaneously, making regular checks a simple but effective habit.