Security utility

Password Generator

Generate a browser-side password and estimate entropy from length and character set size.

Use a password manager

Long, unique passwords are strongest when stored in a reputable password manager. This generator is useful for quick local generation, but account recovery, phishing resistance and multi-factor authentication also matter.

Example

A 16-character password using uppercase, lowercase, numbers and symbols has far more possible combinations than an 8-character password from letters only. Length usually improves resistance faster than making a short password complicated.

Common mistakes

Do not reuse generated passwords across accounts. Avoid copying a password into shared notes, chat messages or unencrypted documents.

Limitations

For high-security use, prefer a vetted password manager or operating-system generator with cryptographic randomness. A password alone does not protect against phishing or device compromise.

Last reviewed: 2026-05-17

Before relying on this result

Use this calculator together with the formula, assumptions, limitations and examples on the page. If the topic involves health, tax, lending, investment, legal, safety or current-rate decisions, treat the number as an estimate and check the relevant primary source or professional guidance.

Calculator metadata last reviewed: 2026-05-14.