IT Calculators
Password Generator
Generate cryptographically secure passwords with customizable options.
What is the Password Generator & How does it work?
This tool generates strong, random passwords by combining character pools you select: uppercase letters, lowercase letters, digits, and symbols. Including more character types and using longer lengths dramatically increases the number of possible combinations an attacker would need to try.
Passwords are generated using crypto.getRandomValues() — the browser’s cryptographically secure random number generator — rather than Math.random(), which is not suitable for security purposes. The generator also guarantees at least one character from each selected pool.
Entropy = log₂(poolSizelength)
poolSize = total characters available | length = password length | higher entropy = harder to crack
Parameters
chars
Uppercase letters
A–Z
Lowercase letters
a–z
Numbers
0–9
Symbols
!@#$%…
Generated Password
—
Length
—
characters
Pool Size
—
possible chars
Entropy
—
bits
Passwords are generated locally in your browser and never transmitted anywhere.