Password Generator
Generate secure, random passwords with customizable options.
Password Tips
- • Use at least 12 characters
- • Mix uppercase and lowercase
- • Include numbers and symbols
- • Avoid dictionary words
- • Use unique passwords
Security
Passwords are generated using cryptographically secure random numbers.
All generation happens in your browser - passwords are never sent to a server.
Complete Guide to Strong Passwords
Why Password Strength Matters
Weak passwords are the leading cause of data breaches. Attackers use sophisticated techniques like dictionary attacks, brute force, and rainbow tables to crack passwords. A weak 8-character password can be cracked in minutes, while a strong 16-character password would take millions of years.
This generator creates cryptographically secure random passwords using your browser's built-in CSPRNG (Cryptographically Secure Pseudo-Random Number Generator). Unlike simple random functions, CSPRNG produces unpredictable output suitable for security applications.
Password Cracking Times
| Length | Time to Crack |
|---|---|
| 6 chars | Instant |
| 8 chars | 8 hours |
| 10 chars | 5 months |
| 12 chars | 200+ years |
| 16 chars | Billions of years |
*Assuming mixed case + numbers + symbols
Password Security Best Practices
✅ Do This
- • Use 16+ characters
- • Use unique passwords per account
- • Use a password manager
- • Enable 2FA/MFA everywhere
- • Include all character types
❌ Avoid This
- • Dictionary words
- • Personal info (birthdays, names)
- • Common patterns (123456, qwerty)
- • Reusing passwords
- • Simple substitutions (p@ssw0rd)
🛡️ Extra Security
- • Hardware security keys
- • Biometric authentication
- • Login notifications
- • Regular security audits
- • Check for breaches (HaveIBeenPwned)
🔒 Cryptographically Secure & Private
This password generator uses the Web Crypto API for true randomness. All passwords are generated entirely in your browser—nothing is sent to any server. Your passwords are never stored, logged, or transmitted. You can safely use this tool for your most sensitive accounts.
Related Security Tools
Frequently Asked Questions
How long should my password be?
For most accounts, 12-16 characters is the minimum recommended length. For high-security accounts (banking, email, password manager), use 16-20+ characters. Each additional character exponentially increases the time needed to crack the password. With today's computing power, 8-character passwords can be cracked in hours, while 16-character passwords would take millions of years.
Are randomly generated passwords really more secure?
Yes, significantly more secure. Human-created passwords tend to follow predictable patterns (capitalizing first letter, adding numbers at the end, using common substitutions like @ for a). Attackers exploit these patterns. Truly random passwords have no patterns to exploit, making them exponentially harder to crack. This generator uses cryptographically secure random number generation (CSPRNG).
Should I include symbols in my password?
Yes, when possible. Including symbols dramatically increases the character set from 62 (letters + numbers) to 90+ characters, making passwords much harder to crack. However, some systems have restrictions on which symbols are allowed. If a site doesn't accept certain symbols, generate a new password with only allowed characters.
How does this password generator work?
This generator uses the Web Crypto API's crypto.getRandomValues() function, which provides cryptographically secure random numbers. Unlike Math.random(), which is predictable, CSPRNG generates truly unpredictable values suitable for security purposes. Each character is independently selected from your chosen character set with uniform probability.
Is it safe to generate passwords online?
With this tool, yes. Our password generator runs 100% in your browser using JavaScript. No passwords are ever sent to our servers—you can verify this by checking your browser's network tab. The generation happens locally using your browser's built-in cryptographic functions. For maximum security, you can even use this tool offline after the page loads.
How do I remember complex passwords?
Don't try to memorize them—use a password manager like 1Password, Bitwarden, or KeePass. You only need to remember one strong master password. Password managers securely store all your other passwords, auto-fill them when needed, and sync across devices. This lets you use unique, complex passwords for every account.
What makes a password "strong"?
Password strength depends on: length (most important), character variety (uppercase, lowercase, numbers, symbols), and randomness (no patterns or dictionary words). Our strength indicator evaluates these factors. A "Very Strong" password has 16+ characters with all character types, providing protection against all known attack methods.
How often should I change my passwords?
Modern security guidance (NIST) no longer recommends regular password changes unless there's evidence of compromise. Frequent changes often lead to weaker passwords. Instead: use unique passwords per account, enable two-factor authentication, and change passwords only when you suspect a breach or after a service announces one.