Password Strength Checker
Test how strong a password really is.
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See how strong your password really is
Type a password and this checker rates it in real time, showing the entropy in bits, an estimate of how long it would take an attacker to crack offline, and a clear strength verdict from very weak to very strong. Instead of a vague meter it explains the maths: it works out the size of the character set you used and multiplies by the length, which is why a long passphrase of simple words can easily beat a short scramble of symbols. It also flags the specific weaknesses dragging a password down, like being too short, missing a character type, repeating characters, running in a sequence, or matching one of the most-leaked passwords ever. Crucially, nothing you type is sent anywhere or stored; the analysis happens entirely in your browser.
Why entropy beats a simple meter
Entropy measures the real number of guesses needed. Length raises it far faster than swapping a letter for a symbol, which is why twelve characters or more is the single best habit.
Frequently asked questions
Is it safe to type my real password here?
Yes. The check runs entirely in your browser with JavaScript; the password is never transmitted, logged or stored. You can disconnect from the internet and it still works.
What is a good entropy score?
Aim for at least 60 bits for everyday accounts and 80 or more for important ones. The checker shows the figure and labels the strength for you.
How is the crack time estimated?
It assumes a fast offline attack of about ten billion guesses per second against a leaked hash. Real attacks vary, so treat it as a relative guide, not a guarantee.