Password Generator
Password & SecurityProcessed locally in your browser using the Web Crypto API. Nothing is sent to any server.
How It Works
This tool generates cryptographically secure random passwords using your browser's built-in random number generator — the same technology used by banking applications. Unlike basic random functions, this API uses hardware-level entropy sources to produce truly unpredictable values.
How It Works
- True randomness: Each character is chosen using hardware-level entropy, making passwords virtually impossible to predict or reproduce
- No bias: The generator uses rejection sampling to ensure every character in your selected set has an equal chance of being chosen
- Client-side only: All generation happens in your browser — passwords are never transmitted to any server
- Instant results: Generate up to 10 passwords at once, each with real-time strength analysis showing entropy bits and estimated crack time
Password Best Practices
- Use 16+ characters — length is the single most important factor; each additional character exponentially increases cracking time
- Enable all character types — combine uppercase, lowercase, numbers, and symbols for maximum complexity
- Never reuse passwords — every account should have a unique password; a breach at one site won't compromise others
- Use a password manager — the average person has 100+ accounts, making it impossible to remember unique strong passwords; let a manager handle it
- Consider passphrases for memorization — if you need to remember a password (like your master password), use a passphrase generator instead for something long yet memorable
Frequently Asked Questions
How are passwords generated?
Passwords are generated using your browser's built-in cryptographically secure random number generator. This is the same technology used by banking applications and is far more secure than basic random number functions. Each character is chosen with true randomness, making the passwords virtually impossible to predict.
What password length should I use?
For most accounts, 16 characters or more is recommended. For critical accounts like email, banking, or your password manager master password, use 20+ characters with a mix of uppercase, lowercase, numbers, and symbols. Longer passwords are exponentially harder to crack.
What makes a password strong?
A strong password has three qualities: length (16+ characters), complexity (mix of uppercase, lowercase, numbers, and symbols), and uniqueness (never reused across accounts). Randomly generated passwords meet all three criteria automatically.
Should I use a password manager?
Yes. The average person has over 100 online accounts, making it impossible to remember unique strong passwords for each one. A password manager generates, stores, and autofills strong passwords securely. You only need to remember one strong master password.
Password vs passphrase — which should I use?
Both are secure, but they serve different purposes. Passwords are shorter and more complex, ideal for accounts managed by a password manager. Passphrases are longer but easier to remember and type, perfect for your master password or accounts you access manually.
Are generated passwords stored anywhere?
No. Passwords are generated entirely in your browser and are never stored, logged, or transmitted to any server. Once you leave the page or refresh, the generated passwords are gone.
Privacy Note
This tool runs entirely in your browser. Your input is never uploaded, stored, or sent to any server.
Disclaimer: This tool is provided for educational and informational purposes only. The results do not constitute professional security advice. Use at your own discretion.