Password Generator - Strong Random Passwords
How to Generate a Secure Password
Adjust the password length using the slider (4 to 128 characters), select which character types to include (uppercase letters, lowercase letters, numbers, and symbols), and click Generate Password. The strength meter shows how secure your password is based on length and character diversity.
For maximum security, use at least 16 characters with all four character types enabled. The generated password uses the Web Crypto API (crypto.getRandomValues), which provides true cryptographic randomness — the same standard used by banks and security software.
Password Strength Guidelines
| Length | Types | Strength | Crack Time |
|---|---|---|---|
| 8 chars | letters only | Weak | Minutes to hours |
| 12 chars | letters + numbers | Good | Years |
| 16 chars | all types | Strong | Billions of years |
| 20+ chars | all types | Excellent | Heat death of universe |
The strength meter in this tool evaluates your password based on length, character variety, and randomness. A password rated “Strong” would take modern hardware billions of years to brute-force.
Why You Should Never Reuse Passwords
Data breaches happen constantly. When a company is breached, attackers get email-password pairs that they test on other sites (credential stuffing). If you reuse passwords, one breach compromises all your accounts. Generate a unique password for every account and store them in a password manager.
Features
- Cryptographic randomness — uses the Web Crypto API for true random generation
- Adjustable length — from 4 to 128 characters
- Character type options — uppercase, lowercase, numbers, symbols
- Strength indicator — visual feedback on password security
- Nothing stored — passwords are generated in your browser and never sent anywhere
Secure Your Data Further
Need to encrypt sensitive text before sharing? Try our Text Encryptor which uses AES-256-GCM encryption. You can also verify file integrity with our File Hash Calculator or generate SHA-256 hashes for data verification.
Frequently Asked Questions
How long should my password be?
A strong password should be at least 12 characters long, though 16+ characters is recommended for important accounts. Each additional character exponentially increases the time needed to crack the password. A 16-character password with mixed character types would take billions of years to crack with current technology.
Is this password generator safe to use?
Yes. This tool uses the Web Crypto API (crypto.getRandomValues), which is a cryptographically secure random number generator built into your browser. No passwords are ever sent to a server, stored in a database, or logged anywhere. The generation happens entirely in your browser's memory and disappears when you leave the page.
What makes a password strong?
A strong password has three properties: length (12+ characters), complexity (mix of uppercase, lowercase, numbers, and symbols), and randomness (not based on dictionary words, personal information, or predictable patterns). This generator satisfies all three by using true cryptographic randomness.
Should I use a different password for every account?
Absolutely. Using the same password across multiple sites means that if one site is breached, attackers can access all your other accounts. Use this generator to create a unique password for each account, and store them in a password manager like Bitwarden, 1Password, or KeePass.