Add the requested inputs
Use the labelled fields in the workspace above. If example values are provided, try them first or replace them with your own.
Security & privacy · Free online tool
Password strength checker
Review password length, character variety and obvious patterns without sending the password anywhere.
3 guest runs per rolling 24 hours10 with a free accountPrivate inputsMobile-friendly
Password strength checker workspace
Runs locally in your browser
This local heuristic cannot confirm uniqueness or whether a password has appeared in a breach.
Result
Heuristic strength—
Score—
Raw entropy estimate—
Checks and feedback
Important limitation
Use it with confidence
How to use the password strength checker.
Calculate and review
Use the main action when needed. A local heuristic considers length, estimated character pool, repeats, sequences and common patterns.
Try a worked example
Compare a short complex-looking password with a much longer unique passphrase.
Check the assumptions
No meter can prove a password is safe or unknown to attackers. Never paste a real password unless you accept the local-device risk.
Helpful answers
Password strength checker FAQs.
Is the password strength checker free?
Yes. Guests receive 3 runs per rolling 24 hours, verified free accounts receive 10, and Premium subscribers receive unlimited normal use.
Does UtilHub upload or save my inputs?
No. This tool runs in your browser and UtilHub does not receive or store the values you enter. Your browser or device may still retain normal local history or form data.
How does this password strength checker work?
A local heuristic considers length, estimated character pool, repeats, sequences and common patterns.
What should I check before using the result?
No meter can prove a password is safe or unknown to attackers. Never paste a real password unless you accept the local-device risk.