Password Generator

How to create a secure password?

A secure password must be long (minimum 12 characters), random and unique for each service. Our generator uses the browser's crypto.getRandomValues() API — a cryptographically secure random number generator (CSPRNG) that guarantees maximum entropy.

What is password entropy?

Entropy measures password strength in bits. It's calculated by: entropy = length × log₂(alphabet size). A 16-character password from a 72-character alphabet has entropy of 16 × log₂(72) ≈ 97 bits. Below 50 bits: weak. 50-80 bits: good. Above 80 bits: excellent.

Passphrase vs classic password

A passphrase (e.g. correct-horse-battery-staple) combines 4 random words for 44 bits of entropy and easy memorability. A classic 8-character complex password often has less entropy. Passphrases are recommended by NIST (National Institute of Standards and Technology) for important accounts.