A Practical Guide to Password Generator

Password Generator creates random passwords using the Web Crypto API's getRandomValues, the same cryptographically secure randomness source browsers use for security-sensitive operations, rather than a predictable pseudo-random function.

Step-by-step

1. Set the length and choose which character types to include — uppercase, lowercase, numbers, symbols.
2. Optionally exclude similar or ambiguous characters (like l, 1, I, or O, 0) if you'll need to type the password manually.
3. Copy the generated password, or regenerate for a new one.

Length matters more than complexity

A longer password with fewer character-type restrictions is generally stronger than a shorter one packed with symbols — each additional character multiplies the number of possible combinations far more than adding another character type does. If a service allows long passwords, favor length over cramming in every possible symbol.

What the entropy score measures

Entropy estimates how many attempts a brute-force attack would statistically need to guess the password, based on its length and character variety — higher entropy means a larger search space and a harder password to crack by brute force alone. It doesn't account for whether the password resembles a real word or pattern, which is why random generation beats a "strong-looking" password you made up yourself.

When to exclude similar/ambiguous characters

If you'll ever need to type this password by hand — reading it off a screen or a sticky note — excluding similar-looking characters avoids misreading an l as a 1 or an O as a 0. If you're only ever copy-pasting it (ideally from a password manager), this doesn't matter.

Ready to generate one? Open the free Password Generator.