Free Password Generator Online
Create strong, secure random passwords instantly. Your data stays on your device.
How to Use the Password Generator
- Choose Length: Use the "Password Length" slider to set the number of characters. A length of 16 or more is recommended for high security.
- Select Characters: Check or uncheck the boxes for uppercase, lowercase, numbers, and symbols to tailor the password to specific website requirements.
- Set Quantity: Need multiple passwords? Adjust the "Number of Passwords" slider to generate up to 10 at once.
- Generate: Click "Generate Passwords" to create secure random strings.
- Copy: Review the strength and entropy, then click "Copy to Clipboard" to use your new passwords.
📚 Learn More:
Interested in security mathematics? Read our complete guide on How to Calculate Password Entropy.
Frequently Asked Questions
Is this password generator safe to use?
Yes, it is completely safe. All password generation happens entirely within your web browser using a secure cryptographic API (crypto.getRandomValues). We do not send your passwords to our servers or store them anywhere.
What makes a strong password?
A strong password is long (typically 12-16 characters or more), unpredictable, and unique. It should include a random mix of uppercase and lowercase letters, numbers, and symbols to maximize its entropy.
What is password entropy?
Password entropy is a mathematical measure of how unpredictable a password is, calculated in bits based on length and character set size. An entropy above 60 bits is generally considered strong, while over 80 bits is excellent for protecting sensitive data against automated cracking tools.
Should I use a password manager?
Absolutely. Generating strong, unique passwords for every account is the best practice, but remembering them is impossible. A reputable password manager securely stores all your unique passwords behind one strong master password.