A password generator is a free online tool that creates strong, random passwords you can actually trust. Choose a length from 4 to 128 characters, pick your character sets, and get cryptographically secure passwords with an instant strength meter, generated entirely in your browser with no signup.
Generate passwords
Entropy estimates assume an attacker knows your character sets but not the password.
10 at once
What makes a password strong?
A strong password is long, random and unique to one account. Length matters most: each extra character multiplies the guessing effort exponentially. Randomness defeats dictionary and pattern attacks, and uniqueness means one breached site cannot compromise your other accounts. Aim for at least 16 characters everywhere.
Security researchers measure strength in bits of entropy. A truly random 16-character password drawn from upper, lower, digits and symbols carries about 105 bits of entropy, which is far beyond what brute force can touch. Short human-memorable passwords rarely exceed 40 bits, which is why a generator beats inventing your own.
How does this password generator work?
It draws characters from your selected sets using crypto.getRandomValues, the browser's cryptographically secure random source. Every selected set is guaranteed at least one character, the result is shuffled, and the strength meter converts the pool size and length into a bits-of-entropy estimate.
Unlike generators built on Math.random, which is predictable, crypto.getRandomValues is designed for security-sensitive use. All generation happens locally, so your passwords are never transmitted, logged or stored anywhere.
Should I use a password manager with generated passwords?
Yes, that is the intended workflow. Generate a long random password here for each account, save it in a reputable password manager, and let the manager fill logins for you. You only need to remember one strong master password, which makes unique passwords practical.
Reusing passwords across sites remains one of the top causes of account takeover. A unique 20-character password per site, stored in a manager, removes that risk entirely while you type almost nothing.
Are generated passwords safe to use for Wi-Fi and shared accounts?
Yes, with one tip: enable "exclude ambiguous characters" when people will type or read the password aloud. Removing lookalikes like 0/O and 1/l prevents the most common transcription mistakes on routers, TVs and shared documents, saving frustrating retry loops. That small toggle makes shared passwords far less error-prone.
For Wi-Fi specifically, a 20 to 24 character password with ambiguous characters excluded is both secure and practical to share with guests.
FAQs
Is this password generator free and unlimited?
Yes. Generate as many passwords as you like with no account, no watermark and no limits.
Are the passwords truly random?
Yes. They are built with the browser's cryptographically secure random number generator (crypto.getRandomValues), the same source of randomness used for TLS keys, not the predictable Math.random.
Do you store the passwords I generate?
No. Everything runs locally in your browser. No password ever leaves your device or reaches our servers.
How long should my password be?
Aim for at least 16 characters with a mix of character types. Longer passwords gain entropy fast: a 20-character mixed password has about 130 bits of entropy, far beyond brute-force reach.
What does exclude ambiguous characters do?
It removes lookalike characters such as 0 and O, 1 and lowercase L, making passwords easier to read aloud and type correctly from printed or shared copies.