How secure is your password?

Use this tool to check if your password has appeared in previous database leaks.
This is useful because hackers often will try previously hacked passwords as their first line of attack before moving on to more brute-force like methods, which take up a lot more time and resources.

⚠️ We do not collect or store your passwords..

Only the first three characters of your password are sent to our servers - the rest of the search is done on your end by your own web-browser.
Check the developers console to verify this for yourself!


This application is for entertainment and educational purposes only. If you see your password on the list, you should change it right away, and never use it again.

Where is the data coming from?

All the data is sourced from "Breached Compilation List" - which is a giant dataset containing over 1.4 billion credentials combined from various data hacks that was leaked back in December of 2017. It contains over 400,000 unique passwords that is used when checking for exact/partial matches against your password, because most certainly hackers do the same, given how relatively quickly such list can be searched even with limited resources.

To-do list

Incorporate data from more recent data leaks such as Combination of Many Breaches (COMB) - which includes more than 3.2 billion records compared to just 1.4 billion used by this tool at the moment. The "COMB" dataset is also more recent - it was leaked to public on February of 2021 versus December 2017 for this older "Breach Compilation List" dataset.

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