How to check if your password was leaked
2 min read · Updated October 15, 2026
Use a password manager’s breach alerts or your browser’s password check, which compare your saved passwords against known leaks without exposing them. You can also check your email address to see which breaches it appeared in, then change any password tied to those services.
Two different checks
Both are useful, and they answer different questions.
- ✓Email check: tells you which breaches included your email address, and therefore which services to look at.
- ✓Password check: tells you whether a specific password appears in known leaked password lists.
How to check passwords safely
Reputable password checkers use techniques that avoid sending your full password anywhere. Built-in audits in password managers and browsers are the safest route because they run against your own saved logins.
Is your login already in a leak?
Strong habits help most when you know which accounts are already exposed. Check your email address for free.
If a password is flagged
Assume it is known to attackers. Replace it on every site that used it, starting with email and financial accounts. Choose a new random password and do not reuse any part of the old one.
Prevent the next one
Unique passwords, a password manager and two-factor authentication mean a leaked password affects only one account and cannot be used alone to log in.
Frequently asked questions
Can Leakill tell me my exact leaked password?+
Leakill’s check is based on your email address. A breach report indicates which kinds of data were exposed. Treat any password from a listed breach as compromised.
Is it safe to check passwords online?+
Only with reputable tools that do not need your full password. Built-in manager and browser checks are the safest.
A password is flagged but I changed it. Is it fine?+
Yes, if the new one is unique and you no longer use the old one anywhere.
Stop guessing. Check your email in seconds.
The free Leakill check looks for your email address in known breach records and tells you whether it was exposed. If it was, an optional detailed report lists the incidents, dates, sources, the kinds of data involved and practical next steps. It is a one-off report, not a subscription.
A breach match is a warning signal, not proof that someone has access to your account today. No public database covers every breach, so a clean result lowers risk without guaranteeing safety.