How do I create a strong password?

A strong password should be at least 12 characters long and include a mix of uppercase letters (A-Z), lowercase letters (a-z), numbers (0-9), and symbols (!@#$%). Avoid dictionary words, names, birthdays, or keyboard patterns like 'qwerty'. Use this generator to create one instantly.

What makes a password secure?

Password security is measured in entropy — the number of bits needed to represent all possible combinations. Longer passwords with more character types have higher entropy. A 12-character password using all character types has ~78 bits of entropy, which would take billions of years to crack by brute force at modern speeds.

How long should a password be?

Security experts recommend at least 12 characters for most accounts, and 16+ characters for sensitive accounts like email, banking, and password managers. Each additional character multiplies the possible combinations — going from 12 to 16 characters makes a password roughly 78 million times harder to crack.

Is it safe to use an online password generator?

This generator runs entirely in your browser — no passwords are ever sent to a server or stored anywhere. The generation uses your browser's cryptographically secure random number generator, the same technology used for SSL certificates and financial transactions. You can verify this by turning off your internet connection and the generator will still work.

What are the best special characters to include in a password?

Common special characters like !@#$%^&*()-_=+[]{}|;:,.<>? all add to your password's strength. The key is using at least one symbol type, not which specific symbols. Some websites restrict certain characters, so if a password fails, try regenerating without symbols and add them manually.

Password Generator

A strong password is your first line of defense against unauthorized access. Security experts recommend passwords of at least 12 characters using a mix of uppercase letters, lowercase letters, numbers, and symbols. Each additional character type exponentially increases the number of possible combinations an attacker must try. This generator uses cryptographically random character selection to ensure each password is truly unpredictable. The strength meter calculates entropy — a mathematical measure of randomness — to show you exactly how secure your generated password is.

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calendar_today Updated: April 2026

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shield 100% Private — passwords are generated in your browser and never sent to a server.

tune Options

Password Length 16

416324864

Character Types

Uppercase A-Z Lowercase a-z Numbers 0-9 Symbols !@#$

Number of Passwords

key Generated Password

Strength Very Strong

straighten Entropy: 105.1 bits

lock_clock Crack time: Centuries+

lightbulb Tips

•Use at least 16 characters for important accounts
•Enable 2FA — even strong passwords benefit from it
•Store in a password manager, not a spreadsheet
•Never reuse passwords across different sites

How to Use This Calculator

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Set Password Length

Use the length slider or input to choose how many characters your password should have. 16+ characters is recommended for most accounts.

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Choose Character Types

Toggle uppercase letters, lowercase letters, numbers, and symbols on or off to match the requirements of the site or app you are creating the password for.

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Generate Your Password

Click the Generate button to create a cryptographically random password. The strength meter and entropy score update instantly to show how secure it is.

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Copy and Save

Click the copy icon to copy the password to your clipboard, then paste it directly into a password manager or the registration form.

The Formula

Password strength is measured in bits of entropy. A 12-character password using all character types has a pool of 94 characters, giving 12 × log₂(94) ≈ 78.8 bits of entropy — meaning an attacker would need to try 2^78.8 ≈ 400 quadrillion combinations on average to guess it by brute force.

Entropy (bits) = L × log₂(N)

lightbulb Variables Explained

L Password length (number of characters)
N Character pool size (e.g., 26 lowercase + 26 uppercase + 10 digits + 32 symbols = 94)
Entropy Bits of randomness — higher is more secure. 60+ bits is strong, 80+ bits is very strong

tips_and_updates Pro Tips

Use at least 12 characters — length is the single biggest factor in password security.

Never reuse passwords across accounts — a breach on one site exposes all accounts using the same password.

Store generated passwords in a password manager (Bitwarden, 1Password, or similar) so you don't have to remember them.

Enable two-factor authentication (2FA) on all important accounts — even a strong password is stronger with 2FA.

Avoid dictionary words, names, or dates even if you add numbers — attackers use dictionary attacks that try these first.

Frequently Asked Questions

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