Passphrase Generator
Pick your word count below, and this passphrase generator outputs a string of random, unrelated dictionary words, long enough to be secure and simple enough to remember.
About
About Passphrase Generator
A passphrase generator builds a password out of several random, unconnected words instead of a short string of mixed characters, trading complexity for length, which turns out to be the better trade mathematically. This is often called the xkcd password generator approach after the webcomic that made the idea popular, and the security logic behind it holds up: length matters more to crackability than complexity does.
A password like "Tr0ub4dor&3" feels secure because it mixes cases, numbers, and symbols, but at eleven characters it has a relatively small set of possible combinations for a computer to search through, and it's genuinely hard for a person to type correctly or remember without writing down. A passphrase like four or five random words gets you dramatically more entropy, the actual measure of unpredictability, while staying easier to recall because your brain naturally chunks words rather than random characters.
The entropy math is straightforward: each word pulled from a large word list adds roughly log base 2 of the list size in bits. Pull from a list of about 7,776 words, the classic Diceware word list, and even four random words gets you somewhere around 51 bits of entropy, with five words pushing past 64, numbers that make brute-forcing genuinely impractical.
Choose how many words you want and pick a separator, a hyphen, a space, whatever fits the system you're registering for. Generate as many versions as you like until you land on a combination that happens to stick in your memory, since some random word sequences are just easier to picture than others.
A word is randomly selected from the dictionary using your browser's own randomization, so the sequence it lands on is never transmitted or logged anywhere, which matters more than usual here given that you're specifically generating something meant to stay secret.
FAQ
Frequently asked questions
Why is a passphrase considered more secure than a typical complex password?
It comes down to length and entropy rather than character variety. A passphrase built from several random words is usually far longer than a typical eight to twelve character password, and that extra length makes the total number of possible combinations exponentially larger, even though the individual words are common.
Where does the term xkcd password generator actually come from?
It references a well-known webcomic, XKCD, that illustrated how a string of random common words is both harder for a computer to brute-force and easier for a person to remember than something like a single capitalized word with a number and symbol tacked on. The term stuck as shorthand for this whole approach.
Should I add numbers or symbols to a generated passphrase?
Usually not necessary, four or five truly random words already provide strong security on their own. Some older websites still require at least one number or symbol in their password rules though, so you may occasionally need to tack one on just to satisfy that specific form.
How random are the words this tool actually picks?
Each word is selected from a large dictionary using your browser's randomization functions, with no grammatical logic or pattern connecting the chosen words, which is exactly what keeps the sequence unpredictable.
Is it safe to generate a master password here, like one for a password manager?
Yes, generation happens entirely in your browser's local memory through client-side JavaScript. Nothing about the passphrase you generate gets transmitted anywhere or logged on a server.
What's the best way to separate the words in my passphrase?
Spaces or hyphens both work well and are the most common choices. Either one also adds an extra character to the overall string length, which incrementally increases the passphrase's total entropy.
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