Password Generator: create strong random passwords

A password generator is a tool that creates random passwords for you, so you don't have to invent one yourself. That matters because people are bad at being random: we reach for names, dates, favorite words, and keyboard patterns that attackers know to try first. This free password generator builds every password from a cryptographically secure random source, right in your browser, so each one is unpredictable and unique.

Set the length anywhere from 6 to 64 characters, choose which character types to include, and a new strong random password appears instantly. Copy it with one click and paste it into your password manager or the sign-up form. Nothing is sent to a server or saved anywhere.

How to use this random password generator

Drag the Length slider to the number of characters you need — 16 is the default. Tick or untick Uppercase, Lowercase, Numbers, and Symbols to match the site's password rules, and turn on "Exclude ambiguous characters" if you'll ever need to type the password by hand. Every change generates a fresh password straight away, and the Generate password button gives you another one with the same settings. The bar under the password gives a quick rating from Weak to Very Strong based on its length and the character types you've chosen.

Why cryptographic randomness matters

Not all "random" is equal. Many simple tools use Math.random(), a fast but predictable pseudo-random function never designed for security — in some JavaScript engines its internal state can be reconstructed from enough output. This secure password generator instead uses the Web Crypto API's crypto.getRandomValues(), the same cryptographically secure source browsers use for things like encryption keys. Every character in your password is drawn from that source, and the generator guarantees at least one character from each type you select.

Password generator for 8, 12, 14, or 15 characters: which length?

Length is the single biggest factor in password strength. With all four character types turned on, this generator picks from 88 possible characters, and every extra character multiplies the number of possible passwords by 88. Here's roughly what that means against an attacker making 10 billion guesses per second, which is realistic for offline cracking hardware.

An 8-character password has about 3.6 × 10¹⁵ combinations — around four days to try them all. That's why an 8-character setting should only be used when a site forces a short maximum length. A 12-character password jumps to about 2 × 10²³ combinations, or roughly 680,000 years. A 14-character password reaches about 5 billion years, and a 15-character password about 470 billion years. For anything important, 12 characters is a sensible minimum, and 15 to 16 or more is better — especially since a password manager will remember it for you.

Length vs. complexity

Password strength comes from how many possible combinations an attacker would have to try, and length affects that number more than character variety does. Adding one more character multiplies the search space by the size of your character set; adding a whole new character type only enlarges the set once. In practice, a longer password using fewer character types can be stronger than a short one stuffed with symbols — but using both length and variety, as this generator does by default, gives you the largest practical search space.

What the options actually do

Each character type you enable — uppercase, lowercase, numbers, symbols — adds to the pool the generator draws from, so disabling one narrows that pool and slightly weakens the result. Excluding ambiguous characters (0, O, l, 1, and I) trades a tiny amount of randomness for a password that's easier to read or type correctly by hand — a reasonable trade-off if you'll ever need to enter it manually.

What to look for in a strong password generator

Not every password tool is equally trustworthy. When you're comparing options for the best free password generator, check three things. First, it should use a cryptographically secure random source, like the Web Crypto API, rather than Math.random(). Second, it should generate passwords on your device, not on a server where they could be logged. Third, it should let you control length and character types, so you can meet any site's rules without weakening the password more than necessary. This strong random password generator does all three, and because it runs entirely in your browser, it keeps working even if you disconnect from the internet after the page loads.

Tips for using generated passwords

Use a different password for every account, so a breach on one site can't unlock the others. Store your passwords in a reputable password manager instead of a note or a spreadsheet. Turn on two-factor authentication wherever it's offered. And if you ever suspect a password has leaked, generate a new one and change it right away. Want to see how a password you already use holds up? Try ourpassword strength checker.

Does the generator store or see my passwords?

No. The generator is just code running in your browser tab. When a password is generated, your own device produces the random characters and shows them on screen; nothing is sent to TextsTool or anyone else, and nothing is kept once you leave the page. That's also why a generated password can't be recovered later — once it's gone from the box, it only exists where you pasted it. Save it in your password manager before you navigate away.

Generate as many passwords as you like — the password generator is free, needs no sign-up, and never sends anything to a server.