How does the password leak checker work?

Our tool uses the Have I Been Pwned database with k-anonymity protection. Only the first 5 characters of your password's SHA-1 hash are sent to the API, ensuring your full password never leaves your device.

Is my password safe when checking?

Yes! We use k-anonymity protection, which means only a partial hash of your password is sent to the API. Your actual password never leaves your browser, ensuring complete privacy and security.

What does it mean if my password is found?

If your password is found in the database, it means it has been exposed in a data breach. You should change this password immediately on all accounts where you use it.

Can I check multiple passwords at once?

Yes! Our bulk checking feature allows you to check up to 10 passwords at once, perfect for auditing multiple accounts or sharing with team members.

Does this work offline?

The tool works offline for previously checked passwords (cached results) and provides basic pattern analysis. For real-time breach checking, an internet connection is required.

🕵️ Password Leak Checker

Check if your password has been exposed in data breaches. We check against 10+ billion leaked passwords from Have I Been Pwned.

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100% Private & Secure

We use k-anonymity - your password is hashed locally and only the first 5 characters of the hash are sent to the API. Your actual password never leaves your device.