Free Password Generator — Create Strong Passwords in Your Browser

A strong, unique password is the most important layer of account security. SimpleTools Password Generator creates cryptographically random passwords with your chosen length and character requirements — entirely in your browser, with zero network transmission.

Why Generated Passwords Are More Secure

Human-chosen passwords follow predictable patterns — common words, names, birth years, keyboard walks. Attackers exploit these patterns with dictionary attacks and rule-based cracking.

A randomly generated password like k#mP9$vLz2@Xn has no pattern to exploit. At 13 characters with mixed case, numbers, and symbols, this password would take thousands of years to brute-force.

What the Generator Produces

• Customisable length: 8–128 characters
• Character sets (individually toggleable):
  • Uppercase letters (A–Z)
  • Lowercase letters (a–z)
  • Numbers (0–9)
  • Symbols (!@#$%^&*()-_=+[]{}|;:,.<>?)
• Exclude ambiguous characters: Remove 0, O, l, I that can be confused at a glance
• Exclude specific characters: Define your own exclude list for systems with character restrictions
• Password strength indicator: Visual strength meter based on entropy calculation
• Multiple passwords at once: Generate 5 or 10 options to choose from

Why Generate Passwords in the Browser?

This might seem obvious, but it’s worth stating explicitly: any online password generator that sends your generated passwords to a server is a security risk. There’s no legitimate reason for a password generator to make a network request — the cryptographic randomness needed is available natively in every modern browser.

SimpleTools Password Generator:

✅ Uses crypto.getRandomValues() — the browser’s own cryptographically secure random number generator
✅ Zero network requests — no passwords travel over the internet
✅ Works offline — generate passwords without internet access
✅ No account, no storage — generated passwords aren’t saved anywhere

How It Works

The password is generated using the Web Crypto API’s crypto.getRandomValues() function, which provides cryptographically strong randomness (suitable for security purposes, unlike Math.random()):

const charset = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*';
const array = new Uint32Array(length);
crypto.getRandomValues(array);
const password = Array.from(array, n => charset[n % charset.length]).join('');

The entropy-based strength calculation estimates how long it would take to brute-force the password at a rate of 10 billion guesses per second (a high-end GPU cluster rate).

How to Use the Password Generator

1. Go to simpletools.one/password-generator
2. Set the desired length with the slider or input field
3. Toggle character sets: uppercase, lowercase, numbers, symbols
4. Optionally exclude ambiguous characters
5. Click Generate to create a new password
6. See the strength indicator and entropy estimate
7. Click Copy to copy to clipboard
8. Click Generate Again to get a new random password

Password Strength Guide

For most accounts: 16 characters, all character sets is an excellent choice.

Best Practices for Using Generated Passwords

1. Use a password manager: Generated passwords are random and unmemorable — store them in 1Password, Bitwarden, Dashlane, or a similar tool
2. Unique per account: Never reuse passwords — if one account is breached, the others stay safe
3. Enable MFA: Even the strongest password is enhanced by multi-factor authentication
4. Replace old passwords: If you have passwords you actually remember or that you’ve used for years, replace them with generated ones

Generate a secure password at simpletools.one/password-generator — completely private, cryptographically random, and free.