Password leak checker
Check whether a password has appeared in a known data breach, without sending the password anywhere.
In your browser
About this tool
Find out whether a password appears in known data breaches. Your browser hashes the password and sends only the first five characters of that hash, so the password itself is never shared.
How to use it
- 1 Type the password.
- 2 Select Check.
- 3 If it has leaked, stop using it everywhere.
Questions
Is it safe to type my real password?
Yes. Only a 5-character fragment of its SHA-1 hash is sent, and the match is done in your browser.
Is my data uploaded?
No. This tool runs in your browser, so your text and files never reach our server.
Is this tool free?
Yes. It’s free to use with no sign-up and no limits for normal use.