4-Word Passphrase Generator
A 4-word passphrase generator creates passphrases with ~44 bits of entropy — the recommended minimum for most online accounts. Four random words provide a good balance of security and memorability, making this the most popular passphrase length for everyday use.
Why 4 words is the standard
The 4-word passphrase became the de facto standard after the famous xkcd "correct horse battery staple" comic popularized the concept. With ~44 bits of entropy, it exceeds the 40-bit threshold for most online accounts (which have rate-limiting and 2FA as additional defenses). It's also the cognitive sweet spot — most people can remember 4 random words with moderate effort.
4-word passphrase entropy breakdown
From our 2,000-word list: 4 × log₂(2000) ≈ 44 bits. Adding a number: ~51 bits. Adding both number and symbol: ~54 bits. These levels are considered adequate (50+ bits) or fair (40–50 bits) by security standards. For accounts that support it, enable 2FA to add a second authentication layer that protects even if the passphrase is somehow compromised.
Frequently Asked Questions
A 4-word passphrase (~44 bits) is suitable for most everyday accounts including shopping, streaming, and social media. For email, banking, and high-value accounts, add a number and symbol or upgrade to 5–6 words.
Create a brief mental image linking all 4 words — unusual combinations are actually easier to remember because they form surprising mental pictures. Say the passphrase aloud a few times and type it 5 times when you first create it.
It's from an xkcd comic (#936) by Randall Munroe that illustrated how a passphrase of 4 common words can be both more secure and more memorable than a "complex" 8-character password. The comic popularized passphrases as a practical security tool.
Capitalization adds minimal entropy (each word capitalization is a binary choice = 1 bit per word = 4 bits). Its main value is readability and satisfying "must include uppercase" requirements on some sites. Enable it for compatibility.