Password Generator
Bulk Generator
How to Use This Tool
Creating 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.
Next, toggle 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.
Your 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.
For 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.
The 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. Everything runs in your browser with no data stored anywhere.
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.
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.
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 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.
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.