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Security tool

Password Strength Checker

Estimate entropy and crack time for a password.

Runs on-deviceNo sign-upFree
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Password Strength Checker workspace

Workspace

Password Strength Checker

Runs locally

Nothing is fetched from an API. Results are produced with local data and cryptographic randomness where it matters.

Generated

The guide

By the utils.sbs team · Reviewed November 2026 · How we build and review tools

Quick answer

Password Strength Checker is a free browser-based security tool. Estimate entropy and crack time for a password. It runs with JavaScript and Canvas locally, requires no account and does not upload your files. Open the page, add your input, adjust any options and download the result.

What is Password Strength Checker?

Password Strength Checker is a free browser-based security tool from utils.sbs. Estimate entropy and crack time for a password. It is built for quick, focused jobs: open the page, add your input, adjust the options and take the result with you. No account, install or server upload is required.

At a glance

CategorySecurity
InputText prompts and the options shown on this page
OutputGenerated text, a list or an image
EngineJavaScript and Canvas
ProcessingIn your browser
PriceFree
AccountNot required

How Password Strength Checker works

The generator produces its output locally from the options you choose. Random output uses the browser's built-in randomness.

How to use Password Strength Checker

  1. 1Open Password Strength Checker and add your input.
  2. 2Adjust the options: password to test.
  3. 3Run the tool, check the preview or result, and download the output.

When to use Password Strength Checker

  • Create placeholder content for a design or prototype.
  • Generate a list, name or sample data set quickly.
  • Explore variations before writing the final copy.

Inputs and options

Password to test
Set this value before running the tool.

Limitations

Generated output should be reviewed before publishing, and random results differ between runs.

Privacy and accuracy

Password Strength Checker processes its input in the browser whenever the platform API allows it. Files and values are not uploaded to a server for processing, and the tool does not require an account. For calculations, use the result as a reference and verify important decisions against the source formula or a qualified professional. Read our methodology.

FAQ

Password Strength Checker questions

  • What can I do with Password Strength Checker?

    Estimate entropy and crack time for a password. Password Strength Checker is part of the Security shelf on utils.sbs and is designed for quick, one-off tasks.

  • Is Password Strength Checker free to use?

    Yes. Password Strength Checker is free, requires no account, and has no per-file or per-use charge.

  • Are my files uploaded when I use Password Strength Checker?

    No. Password Strength Checker is designed to process your input locally in the browser. Files are not uploaded to a server for processing.

  • What formats does Password Strength Checker support?

    It generates text, lists or images from the options you select and returns the result locally.

  • Can I use Password Strength Checker on my phone?

    Yes. Password Strength Checker is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

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