Secure Password Generator

About the Secure Password Generator

What is this tool?

This generator creates passwords the way security engineers do it: with your browser's cryptographic random number generator (crypto.getRandomValues), never the predictable Math.random() that many online generators quietly use. Every password is produced on your device, is never stored anywhere, and never touches our servers.

You get three styles. Password builds random character strings up to 128 characters with full control over the character sets. Passphrase strings together words from the EFF's 7,776-word diceware list, the standard for memorable-but-strong secrets, so something like Vivid-Kite-Manual-Poem-Salsa8 is both easy to remember and genuinely hard to crack. PIN makes random numeric codes for devices and cards. The strength meter shows the exact entropy of your settings in bits, along with an honest estimate of how long a fast offline attack would need to guess it.

How to Use This Tool

1. Pick a type. Random password, memorable passphrase, or numeric PIN. Fresh results appear instantly and regenerate whenever you change a setting.
2. Tune the settings. Adjust length or word count, toggle character sets, exclude look-alike characters for anything you might have to type by hand, or edit the exact symbol set a picky website allows.
3. Check the meter. The bar shows the real entropy of your configuration and roughly how long it would survive ten billion guesses per second.
4. Copy or save. Copy one password, copy the whole batch, or download them as a text file. The person icon spells a password out phonetically (tango · echo · …) for reading over the phone.

Common Use Cases

• New accounts: generate a unique 16+ character password per site and store it in a password manager.
• Master passwords and disk encryption: a 5 or 6 word passphrase is strong enough to protect everything else, yet possible to memorize.
• Wi-Fi and shared credentials: exclude look-alike characters and use the phonetic spelling to dictate the password without the "was that a capital O or a zero?" dance.
• Provisioning in bulk: generate up to 100 at once and download the list for account setups, then delete the file once they are distributed.

Frequently Asked Questions

What is the strongest type of password?

Length beats complexity. A completely random 16-character password using all character types (about 103 bits of entropy) or a random 6-word passphrase (about 78 bits) are both far beyond what any realistic attacker can brute-force. The critical part is that it is random and unique, not that it looks complicated: Tr0ub4dor style substitutions add almost nothing.

Is a 12-character password safe?

A random 12-character password from this generator has about 77 bits of entropy, which would take a fast offline attack thousands of years on average, so yes. A human-invented 12-character password is a different story, because people choose predictable patterns. If a site allows it, 16 characters costs you nothing extra when a password manager does the remembering.

What do the bits of entropy mean?

Entropy measures how many equally likely possibilities an attacker must search. Each bit doubles the work: 40 bits is about a trillion possibilities, which modern hardware chews through quickly, while 80 bits is a trillion times harder than that. Because this tool generates truly random output, the number shown is exact, not an estimate based on how the password looks.

Are passphrases really as secure as random passwords?

Yes, when the words are chosen randomly from a large list. Each word from the 7,776-word EFF list adds 12.9 bits of entropy, so five words reach about 65 bits and six words about 78, comparable to a 12-character fully random password but far easier to type and remember. The security comes from the random selection, so resist the urge to swap in words you like better.

Is it safe to generate passwords on a website?

It is with this one, for a verifiable reason: the entire generator runs in your browser, uses the operating system's cryptographic randomness, and never sends, stores or logs anything. You can load the page, disconnect from the internet, generate passwords, and close the tab, and the passwords never existed anywhere but your screen and clipboard.

What does the exclude look-alikes option do?

It removes the characters that are easy to confuse when reading or typing a password by hand: capital I, lowercase l and the digit 1, plus capital O, lowercase o and the digit 0. Use it for Wi-Fi keys, printed credentials, or anything you might dictate. It slightly reduces the character pool, and the entropy meter updates to reflect that honestly.

Does requiring every character type make passwords stronger?

Barely; it mostly exists because many websites demand it. Forcing at least one character from each set trims a tiny sliver of theoretical entropy (the all-lowercase possibilities are excluded, for example), but for any reasonable length the difference is a rounding error. Leave it on so your passwords pass the checks; just know that length is what actually matters.

Why do I need a different password for every site?

Because breaches happen constantly, and attackers immediately try leaked email and password pairs on every other popular service, an attack called credential stuffing. A unique random password per site means one breached forum costs you exactly one account. Pair this generator with a password manager and reuse becomes a problem you simply do not have.