Password Generator
Generate strong random passwords with custom length and character sets.
Loading calculator…
About this calculator
A 16-character mixed password with 90 possible characters has ~105 bits of entropy — far beyond brute-force reach. Length beats cleverness every time.
Formula
Entropy = length × log2(charset size); each extra character multiplies possibilities by charset size.
Frequently Asked Questions
Is Math.random safe?
This generator prefers crypto.getRandomValues when available (browser CSPRNG); Math.random is the fallback.