Password Strength Checker
Last updated: June 1, 2026Test how strong a password is.
Password Strength Checker is a free online tool to test how strong a password is. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Password Strength Checker
The Password Strength Checker rates how strong a password is, with an entropy score and an estimated time to crack, plus tips to improve it. The password is analysed entirely in your browser and never sent anywhere. Free and private.
- 1Type or paste the password.
- 2See the strength meter and crack-time estimate.
- 3Follow the tips to make it stronger.
100% private
The password is checked on your device — never uploaded.
Real entropy
Scores by character variety and length, not just rules.
Actionable tips
Clear checklist to strengthen a weak password.
Password Strength Checker — frequently asked questions
Is it safe to type my password here?
Yes — the check runs entirely in your browser with JavaScript. Nothing is sent to a server or stored.
What makes a strong password?
Length matters most. Aim for 12+ characters mixing upper and lower case, numbers and symbols, and avoid common words.
Is it free?
Yes, completely free.
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