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Password Generator

Create strong random passwords with length and character-class controls. Fully client-side — no account, uploads, or remote storage.

Added Apr 18, 2026 · Updated Apr 21, 2026

Input

Result

Enter a value for password length to see your result.

How it works

Generates a cryptographically random password using the selected character sets and length. Password strength is estimated using entropy — the number of bits needed to represent all possible passwords of that length and character set.

Step by step

  1. 01Select the character sets to include (uppercase, lowercase, numbers, symbols).
  2. 02Set the password length (16+ characters recommended for security).
  3. 03The tool uses the browser's cryptographic random number generator (crypto.getRandomValues) — not Math.random().
  4. 04Each generation produces a completely new password.

Examples

16-character strong password

A 16-character password with all character types has a search space of 91^16 ≈ 2^103 combinations.

Inputs

Password length:
16
Uppercase letters (A–Z):
true
Lowercase letters (a–z):
true
Numbers (0–9):
true
Symbols (!@#$%…):
true

Result

Strength:
Excellent
Entropy (bits):
~103 bits
Note: Never reuse passwords across accounts. Use a password manager to store them securely. Entropy > 60 bits is generally considered strong; > 80 bits is very strong; > 100 bits is excellent.

Related guides

Frequently asked questions

Is this password generator secure?

Yes — passwords are generated entirely in your browser using the Web Crypto API (crypto.getRandomValues), which uses the OS cryptographic random number generator. No password is sent to any server.

How long should my password be?

At least 12 characters for most accounts, 16+ for sensitive accounts (banking, email), and 20+ for master passwords or admin accounts. Length is the single most important factor in password strength.