Password Generator

How to Use This Password Generator

1. Set the password lengthCreating a strong password is instant. Use the length slider to set your desired password length - anywhere from 4 to 128 characters. For most accounts, 16 or more characters is recommended.
2. Pick character typesToggle the character types you want to include: uppercase letters, lowercase letters, numbers, and special symbols. You can also exclude ambiguous characters like 0, O, l, and 1 that are easy to confuse when reading passwords manually.
3. Copy or regenerateYour password generates automatically as you adjust settings. Click the copy button to copy it to your clipboard, or click the refresh icon to generate a new password with the same settings.
4. Generate in bulkFor creating multiple passwords at once, enter the quantity you need in the bulk generate field (up to 50) and click "Generate All." This is useful when setting up multiple accounts or generating temporary access codes for a team.
5. Check the strength meterThe strength meter shows your password's estimated strength based on entropy - the higher the entropy score, the longer it would take to crack using brute force methods.

What is Password Entropy?

Password entropy is a mathematical measure of how unpredictable a password is. It's calculated in bits, where each bit doubles the number of possible combinations an attacker would need to try. A password with 40 bits of entropy has about one trillion possible combinations, while one with 80 bits has over a sextillion. A good strong password generator aims for 80 bits or more.

The entropy formula

The formula is straightforward: entropy equals the password length multiplied by the logarithm (base 2) of the character pool size. A 12-character password using uppercase letters, lowercase letters, numbers, and symbols (95 possible characters) has roughly 79 bits of entropy.

How many bits are enough?

Security experts generally recommend a minimum of 60 bits for standard accounts and 80 or more bits for sensitive accounts like banking or email. Passwords below 40 bits of entropy can be cracked in minutes with modern hardware.

Length beats complexity

Length contributes more to entropy than complexity. A 20-character password using only lowercase letters (94 bits) is stronger than an 8-character password using all character types (52 bits). This is why passphrases — long sequences of random words — have become a popular alternative to shorter complex passwords.

Why generators beat human memory

Password generators produce truly random output using your browser's built-in cryptographic random number generator, which is far more unpredictable than anything a human could create from memory.

Why Choose This Free Password Generator?

• Cryptographically secureUses the browser's Web Crypto API (crypto.getRandomValues), the same primitive banks and password managers rely on.
• Flexible lengthGenerate 4- to 128-character passwords for anything from PINs to Wi-Fi passphrases.
• Character controlsToggle uppercase, lowercase, numbers, and symbols. Exclude ambiguous characters (0/O, 1/l/I).
• Bulk generationCreate up to 50 unique passwords at once for onboarding a team or seeding test accounts.
• Entropy & crack-time meterSee bits of entropy and an estimated crack time in real time.
• One-click copySend the password straight to your clipboard without ever leaving the page.
• 100% privateNo signup, no history, no passwords stored or transmitted. Everything happens locally.
• Works offlineOnce the page is loaded, the generator keeps working without a network.

Recommended Password Length by Use Case

• Throwaway / forum accounts12 characters.
• Email, cloud storage, social media16 characters minimum.
• Banking, crypto wallets, admin panels20+ characters.
• Wi-Fi WPA2/WPA3 passphrases20–32 characters.
• Encryption master keys / vault passwords24+ characters or a long passphrase.
• PINs6–8 digits (numbers-only mode).
• Device unlock codes8–12 alphanumeric characters.

Password Security Best Practices

• Use a unique password for every accountCredential-stuffing attacks rely on you reusing the same one.
• Store passwords in a manager1Password, Bitwarden, iCloud Keychain, or your browser's built-in vault. Never in a spreadsheet or notes app.
• Enable two-factor authentication (2FA)Preferably with an authenticator app or hardware key, not SMS.
• Change passwords only when compromisedNIST and modern guidance advise against forced rotation, which encourages weaker passwords.
• Watch for phishingEven a perfect password can't save you if you enter it on a fake site. Always check the domain.
• Check for breachesUse services like Have I Been Pwned to learn if your accounts have been exposed.
• Avoid personal dataNo names, birthdays, pet names, or favorite teams. Attackers scrape social media first.

Frequently Asked Questions