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Strong Password Generator

Generate strong, random, and cryptographically secure passwords online. Customize length, uppercase, lowercase, numbers, and symbols client-side.

Password Settings

Length16
Quantity
Security StrengthVery Strong
Entropy Score98 bits
iP8z^D^ELa@TUph&

What is the Password Generator?

The Password Generator creates unpredictable, strong passwords and passphrases based on custom rules and entropy criteria.

How to Use the Tool

  1. Adjust the password length slider (e.g., 8 to 128 characters).
  2. Toggle character sets: Uppercase (A-Z), Lowercase (a-z), Numbers (0-9), and Symbols (!@#$%).
  3. Optionally exclude ambiguous characters like (l, 1, I, O, 0).
  4. Click Generate New or Copy to clipboard.

Common Use Cases

  • Creating strong authentication credentials for developer accounts and cloud consoles.
  • Generating random API keys and database root secrets.
  • Creating temporary passwords for user onboarding.

Supported Formats & Options

Cryptographically secure PRNG, length slider (8-128 chars), granular character set toggles, ambiguous character exclusion, and password strength/entropy meter.

Related Guides & Tutorials

Utilities • 4 min read
How to Create Strong Passwords and Measure Password Entropy

Learn how to build strong passwords, calculate their mathematical entropy, and protect developer accounts securely.

Read Guide
Utilities • 4 min read
Why Math.random() is Insecure: Understanding CSPRNG for Passwords

Understand why Math.random() in JavaScript is insecure for credentials generation, and how cryptographically secure random number generators (CSPRNG) work.

Read Guide
Security • 4 min read
Password Entropy and Cryptographic Randomness: A Developer Guide

Understand password entropy, why Math.random() is insecure for passwords, and how CSPRNG generates collision-proof credentials.

Read Guide

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Frequently Asked Questions

Are these passwords generated securely?

Yes. Passwords use window.crypto.getRandomValues(), providing cryptographically secure randomness (CSPRNG) directly on your device.

Are generated passwords saved on your server?

Never. Passwords exist only in your browser memory and disappear when the tab closes or is refreshed.