DataToolsLab
Security & Crypto Tools

Password Generator

Generate strong random passwords with configurable character sets.

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What is Passwords?

A password generator that guarantees at least one character from every enabled set, then shuffles so no set sits in a predictable position.

How it works

Characters come from crypto.getRandomValues; one seeded char per enabled set plus random fills are Fisher-Yates shuffled into the final password.

  1. Enter your input. Type or paste your input into the field above — the tool responds instantly.
  2. Review the result. Output updates live as you type. Everything runs entirely in your browser.
  3. Copy or download. Use the Copy button to grab the result, or Download to save it as a file.

Examples

Policy-compliant passwords

Generate a 16-character password with upper, lower, digits, and symbols — toggle each character set to match a site's policy.

Common mistakes

Reusing one strong password

The real risk isn't strength, it's reuse. Generate a unique password per site, or let a password manager do it.

Frequently asked questions

How is entropy calculated?

From the length and the number of possible characters in the selected sets — the tool shows the estimate per configuration.

Is my password saved anywhere?

No — generation happens locally and nothing is stored or transmitted.

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