Strong Password Generator

Create strong random passwords with the length and character types you choose, and see an estimate of their strength. Generated locally — passwords are never sent anywhere.

Get new free tools from Quickora

Join the list and I’ll send you new calculators, converters, and everyday utilities when they launch.

No spam. Unsubscribe anytime.

How to use it

Choose a length — 16 or more characters is a good default.
Pick which character types to include. Exclude look-alike characters if you'll type the password by hand.
Copy the password straight into your password manager.

Examples

Everyday account

16 characters with upper and lower case letters, digits and symbols gives about 103 bits of entropy — far beyond practical guessing.

Wi-Fi password

Turn on “exclude look-alikes” so guests don't confuse 0 with O or l with 1 when typing it in.

What makes a password strong

Strength comes from length and randomness, measured in bits of entropy: each bit doubles the number of guesses an attacker needs. The estimate here is length × log₂(pool size), which is accurate because every character is chosen independently at random.

Each password includes at least one character from every type you select, then the characters are shuffled with a cryptographically secure generator so there's no predictable pattern.

entropy (bits) = length × log₂(number of possible characters)

Frequently asked questions

Is it safe to generate passwords on a website?

This generator runs entirely in your browser; the password is never sent over the network or stored. You can even disconnect from the internet after the page loads and it still works.

How long should my password be?

At least 12–16 random characters for accounts, and longer for important ones like your email or password manager. Use a unique password for every site.

Should I memorize these passwords?

Generally no — store them in a password manager. For the one password you must remember, a long passphrase of random words is easier to recall.

Random Number GeneratorGenerate one or many random numbers in any range, with or without repeats. Uses your browser's cryptographic random generator, so every number is equally likely.Coin FlipFlip a fair virtual coin — once, or many times at once — with a running tally of heads and tails. Uses your browser's secure random generator.

Found this useful? Quickora is free to use — buy us a coffee (opens in a new tab) to help keep it that way.

More in Everyday Tools · Last reviewed September 2026