Password Strength Checker
Estimate entropy and how strong it is.
Password Strength Checker is a free, browser-based tool on Toolery. Estimate entropy and how strong it is. Everything runs locally on your device, so it's fast and completely private — no uploads, no queues, and no sign-up to try it.
Password Strength Checker — FAQ
Is Password Strength Checker free to use?
Yes. Password Strength Checker is completely free on Toolery — no watermarks and no sign-up required to try it.
Is Password Strength Checker private — do my files stay on my device?
Yes. Password Strength Checker runs entirely in your browser. Your files and input are processed on your own device and never uploaded to a server, so nothing is stored, seen, or shared.
How do I use Password Strength Checker?
Estimate entropy and how strong it is. Open the tool, add your file or input, and get the result instantly — it all happens on your device.
How secure is Password Strength Checker?
Password Strength Checker uses your browser's built-in Web Crypto and runs 100% on your device. Nothing you enter is ever sent anywhere, so there's no server that could be breached or logged.