Password Generator – Create Strong Random Passwords
Alternative Passwords
Calcon's free Password Generator creates cryptographically random passwords using your browser — nothing is sent to any server. Customize length, character sets, and get a strength rating instantly. Five alternative passwords are shown with every generation.
Password Strength Guide
| Strength | Entropy | Time to Crack (estimate) |
|---|---|---|
| Weak | < 40 bits | Seconds to minutes |
| Fair | 40–59 bits | Hours to days |
| Strong | 60–79 bits | Years |
| Very Strong | 80+ bits | Centuries |
Frequently Asked Questions
How long should a password be?
Security experts recommend at least 12–16 characters for most accounts and 20+ for sensitive ones like banking or email. Each additional character multiplies the number of possible combinations, making brute-force attacks exponentially harder.
What makes a password strong?
A strong password is long, random, and uses a mix of character types (uppercase, lowercase, numbers, symbols). Avoid dictionary words, keyboard patterns like "qwerty123", and personal information like birthdays or names. Use a password manager to generate and store unique passwords for every account.
What are ambiguous characters?
Ambiguous characters look similar in many fonts: 0 (zero) and O (letter O), l (lowercase L), 1 (one), and I (capital I). Excluding them makes passwords easier to transcribe without typos.
Is this password generator secure?
Yes. All password generation happens entirely in your browser using JavaScript's Math.random(). No password is ever sent to or stored on any server. For maximum security, combine this generator with a reputable password manager.
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