IT Calculators
Password Generator
Generate cryptographically secure passwords with customizable options.
What is the Password Generator & How does it work?
This tool generates strong, random passwords by combining character pools you select: uppercase letters, lowercase letters, digits, and symbols. Including more character types and using longer lengths dramatically increases the number of possible combinations an attacker would need to try.
Passwords are generated using crypto.getRandomValues() — the browser’s cryptographically secure random number generator — rather than Math.random(), which is not suitable for security purposes. The generator also guarantees at least one character from each selected pool.
Entropy = log₂(poolSizelength)
poolSize = total characters available | length = password length | higher entropy = harder to crack
Parameters
chars
Uppercase letters
A–Z
Lowercase letters
a–z
Numbers
0–9
Symbols
!@#$%…
Generated Password
—
Length
—
characters
Pool Size
—
possible chars
Entropy
—
bits
Frequently Asked Questions
How do I generate a secure password?
Enter your desired password length and click ‘Generate’ to create a secure, random password.
Can I customize the generated password?
Yes, you can specify options like including numbers, special characters, or excluding similar characters to tailor the password to your needs.
Is this password generator free to use?
Yes, our Password Generator is a free tool available for anyone to generate secure passwords.
How long should my password be for maximum security?
A minimum of 12 characters is recommended, but longer passwords provide even better security against brute-force attacks.
Can I use this password generator on mobile devices?
Yes, you can access our Password Generator through a web browser on any mobile device for convenient password creation.
Does the generator remember my passwords?
No, the Password Generator does not store or save any generated passwords. They are created locally and disappear after use.
What types of characters can I include in my password?
You can include uppercase letters, lowercase letters, numbers, and special characters to increase the complexity and security of your password.
Passwords are generated locally in your browser and never transmitted anywhere.