Generate a Strong, Secure Password
Password Strength Tips
- Use at least 16 characters. Every extra character multiplies cracking time exponentially. 16 random characters using all sets takes centuries to brute-force.
- Mix all character types. Combine uppercase, lowercase, numbers, and symbols to maximize entropy from a shorter length.
- Never reuse passwords. Use a unique, randomly generated password for every account. A breach on one site won't cascade to others.
- Store in a password manager. Tools like Bitwarden (free), 1Password, or Dashlane securely store and autofill your passwords — no memorization needed.
- Enable two-factor authentication (2FA). Even if a password is stolen, 2FA prevents unauthorized access. Use an authenticator app rather than SMS when possible.
- Check for breaches. Visit HaveIBeenPwned.com to check if your email addresses have appeared in known data breaches.
- Avoid personal information. Names, birthdays, pet names, and dictionary words are the first things attackers try. Randomness is your best defense.
How Strong Is Your Password? Time-to-Crack Estimates
Estimates assume 100 billion guesses per second (modern GPU cluster). Times increase dramatically with longer passwords and more character types.
| Length | Character Set | Estimated Time to Crack | Rating |
|---|---|---|---|
| 6 | Lowercase only (26 chars) | < 1 second | Terrible |
| 8 | Letters + Numbers (62 chars) | ~1 second | Very Weak |
| 10 | Letters + Numbers (62 chars) | ~7 minutes | Weak |
| 12 | All types (95 chars) | ~2 years | Fair |
| 16 | All types (95 chars) | ~539 million years | Strong |
| 20 | All types (95 chars) | Longer than universe age ×1011 | Very Strong |
| 32+ | All types (95 chars) | Effectively uncrackable | Uncrackable |
Frequently Asked Questions About Password Security
What makes a password strong and secure?
A strong password is at least 12–16 characters long and combines uppercase letters, lowercase letters, numbers, and special symbols. Avoid dictionary words, personal info like birthdays or names, and sequences like "12345". A truly random password generated by a cryptographic tool is far stronger than any human-chosen password.
How does this password generator work?
This password generator uses the browser's built-in crypto.getRandomValues() API to produce cryptographically secure random numbers. These are mapped to your chosen character set to create a password that cannot be predicted or reproduced. All generation happens in your browser — no data is sent to any server.
Is it safe to use an online password generator?
Yes, as long as the generator runs entirely client-side and uses a cryptographically secure random number generator. This tool generates passwords 100% in your browser using the Web Crypto API. We never transmit, log, or store any passwords. You can verify this by checking your browser's Network tab — no requests are made when a password is generated.
How long should my password be?
We recommend a minimum of 16 characters for most accounts. For highly sensitive accounts like banking or email, aim for 20+ characters. Longer passwords are exponentially harder to crack: a 16-character random password using all character types would take hundreds of millions of years to brute-force with current technology.
Should I use the same password for multiple accounts?
Never reuse passwords across accounts. If one site is breached and your password is exposed, attackers will try that same credential on other services — a technique called credential stuffing. Use a unique, randomly generated password for every account and store them in a reputable password manager like Bitwarden, 1Password, or Dashlane.
What is the difference between a random password and a passphrase?
A random password is a short string of mixed characters (e.g., "X7#mQ2pL!wKr9s"). A passphrase is a sequence of random words (e.g., "correct-horse-battery-staple"). Both can be highly secure. Random passwords pack more entropy per character, while passphrases are longer but often easier to remember. For most online accounts stored in a password manager, a 16+ character random password is the best approach.
How often should I change my passwords?
Modern security guidance (NIST SP 800-63B) no longer recommends changing passwords on a fixed schedule. Instead, change a password when: (1) you suspect it has been compromised, (2) a service you use reports a data breach, or (3) you shared it with someone you no longer trust. If your passwords are strong and unique, frequent rotation adds little security benefit and often leads to weaker passwords.
What special characters should I include in a password?
Including special characters dramatically increases password strength. Common symbols include: ! @ # $ % ^ & * ( ) - _ = + [ ] { } | ; : , . < > ? /. This generator uses a broad set of printable ASCII symbols. Note: some websites restrict which symbols are allowed — if a generated password is rejected, try regenerating or unchecking the symbols option.