Passphrase Generator

A passphrase trades density for memorability: each word from the EFF large wordlist contributes 12.93 bits, so four words give about 52 bits and six words about 78. That is shorter than a 16-character random string in bits, but you can hold it in your head.

The wordlist matters more than the separator. A 7,776-word list means each word is worth a full 12.93 bits only if the words are chosen uniformly from that list — which is exactly what happens here.

How to use it

1. Pick four words for something you will type often, six for a master password.
2. Choose a separator you can type without thinking.
3. Copy it into your password manager anyway — memory is not a backup.

Why the wordlist size is the whole argument

Four words from a 1,000-word list gives 40 bits. Four words from the 7,776-word EFF list gives 52 bits. Same number of words, same length on screen, over 4,000 times the search space. If a passphrase generator does not tell you the list size, its entropy claim is unverifiable.

Adding a digit to the end, as many sites demand, adds only about 6.6 bits (log2(100)) — far less than the fifth word. If you must satisfy a complexity rule, add the digit last and keep the word count high.

Reviewed 2026-10-21. This tool runs entirely in your browser — no server, no account, and nothing you generate is stored.