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ProgrammerKit

Password Strength Meter

Estimate password entropy and crack time live.

Free · Runs in your browser · Last updated

Length
0
Charset size
0
Entropy (bits)
0
Strength
–
Estimated crack time (offline, 10¹⁰ guesses/s)
–

    About this tool

    Test any password and see its character-set size, entropy in bits, estimated crack time and weakness warnings — all evaluated locally.

    Privacy

    All processing for Password Strength happens locally inside your browser using JavaScript. Your input is never uploaded to a server, logged, or shared with third parties.

    Frequently asked questions

    Is the Password Strength free to use?

    Yes. Password Strength is completely free for both personal and commercial projects. There are no usage limits, no sign-up, and no premium tier.

    Is my data safe when I use Password Strength?

    All processing happens locally in your browser using JavaScript. Your input is never uploaded to our servers, logged, or shared with any third party.

    Does Password Strength work offline?

    Once the page has loaded, the tool runs entirely client-side. You can disconnect from the internet and it will keep working in the same browser tab.

    Which browsers are supported?

    Password Strength works in all modern browsers, including the latest versions of Chrome, Firefox, Safari, Edge, Brave, and Opera, on desktop and mobile.

    Do I need to install anything?

    No. Password Strength runs in any modern web browser with no installation, browser extension, or account required.

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