Strong Password Generator
Create cryptographically strong, random passwords that are extremely hard to crack. Choose the length and the type of characters to include, and a fresh password is generated instantly using your browser's secure random source. Nothing is sent to a server — what you see on screen exists only on your device, so it's safe to use even for high-value accounts.
How to Create a Strong Password
Choose your desired length (16+ recommended), tick the character types you want — uppercase, lowercase, numbers and symbols — then click Generate New. The strength meter updates instantly. Hit Copy to copy it to your clipboard and paste it directly into your password manager.
What Makes a Password Secure?
Password security is determined by two things: length and randomness. Every extra character exponentially increases the number of possible combinations a hacker must try. Here is how the math works:
| Length | Character Set | Possible Combinations | Time to Crack (modern GPU) |
|---|---|---|---|
| 8 chars | Lower only | 208 billion | ~seconds |
| 12 chars | Mixed + numbers | 3.2 quadrillion | ~hours |
| 16 chars | All types | 6.7 × 10²⁸ | ~centuries |
| 20 chars | All types | 7.7 × 10³⁶ | Practically impossible |
Password Best Practices
- Never reuse passwords. A breach on one site exposes all accounts sharing that password.
- Use a password manager. Bitwarden, 1Password and Dashlane store passwords securely and autofill them.
- Enable two-factor authentication (2FA) wherever possible — it protects you even if a password is stolen.
- Avoid dictionary words even in combinations like "correct-horse-battery" without extra length.
- Change passwords immediately after any reported data breach.
Is This Password Generator Safe to Use?
Yes. Passwords are generated using window.crypto.getRandomValues() — the same cryptographically secure random number generator (CSPRNG) used by banks and security software. Nothing is sent to a server; the generation happens entirely inside your browser tab.
Frequently Asked Questions
How secure are the generated passwords?
Passwords use window.crypto.getRandomValues — the browser's cryptographically secure RNG. They are never transmitted, logged or stored anywhere on our end.
What password length should I choose?
16 characters with mixed types is secure for most accounts. Use 20+ for banking, primary email or password manager master passwords.
What makes a password strong?
Length matters most. Every extra character multiplies possible combinations exponentially. A 20-character all-types password has more combinations than atoms in the observable universe.
Where should I store generated passwords?
Use a password manager like Bitwarden (free, open source), 1Password or Dashlane. Never store passwords in plain text files, spreadsheets or unencrypted notes.