Developer
Password Generator
Secure random passwords with a strength meter.
🔒 Runs entirely in your browser — nothing here is ever uploaded
CalcoTools · Password Generator · generated 8/23/2026, 12:23:58 PM
About the Password Generator
Generates random passwords in your browser using the Web Crypto API, with adjustable length and character sets, plus a simple strength indicator.
How to use it
- Adjust the Length slider and choose which character types to include.
- Click Regenerate for a new password.
- Copy it with the copy button.
Formula
Each character is chosen using crypto.getRandomValues() — the same secure random-number source browsers use for cryptographic operations, not a simple pseudo-random function.
Worked example
With uppercase, lowercase, numbers, and symbols enabled at 16 characters, a typical result looks like qT7#mK2!vN9$wLpZ.
Recommendations
- • Longer beats more complex — a 16-character password is generally stronger than an 8-character one packed with symbols.
- • Use a unique password per account; a password manager makes this practical without memorizing dozens of strings.
- • Regenerate if a password looks pattern-like to you — it's cryptographically random, but you can always roll again.
Frequently asked questions
It uses the Web Crypto API's secure random number generator, suitable for generating real passwords — not Math.random() or a simple counter.