Click Generate to create your passphrase
// create strong, memorable word-based passphrases
Generate secure, memorable passphrases from random words. Customize word count, separators, and capitalization for strong password creation.
Click Generate to create your passphrase
Drag the slider to choose between 3 and 10 words. More words = stronger passphrase.
Choose dash, dot, underscore, space, or none to join words together.
Hit Generate, review the strength indicator, then copy your passphrase instantly.
A passphrase generator creates passwords made of multiple random common words joined by a separator. Unlike random character strings, passphrases are easy to remember yet extremely secure — a 4-word passphrase has roughly 40 bits of entropy, making it resistant to brute force attacks.
It depends on length. A 4-word passphrase has ~40 bits of entropy, comparable to an 8-character random password. But a 6-word passphrase (~60 bits) beats most random passwords and is far easier to remember. The advantage of passphrases is memorability without sacrificing security.
No. The generation happens entirely in your browser using JavaScript's crypto.getRandomValues() for randomness. Nothing is transmitted or stored. This tool is fully client-side and safe to use offline.
We use a curated list of 1,000 common, memorable English words. This gives approximately 9.97 bits of entropy per word. A 4-word passphrase drawn from this list has about 40 bits of entropy total.
For most online accounts, 4–5 words is sufficient (40–50 bits of entropy). For high-value targets like password manager vaults or SSH keys, use 6–8 words (60–80 bits). Security experts generally consider 50+ bits strong against offline attacks.
If a site requires numbers or uppercase letters, the "Capitalize" and "Insert number" options help you comply without memorizing arbitrary rules. However, they add only modest extra security. The primary security comes from the number of words and the size of the word pool.
Dash is the most common and works with most password fields. Space is most human-readable and easiest to type. If a site disallows spaces, use dash or dot. "None" (joined words) creates compact passphrases like "eaglecabinmaplefrost" — harder to read but still valid.
A passphrase generator is a tool that creates passwords from sequences of random, everyday words rather than from scrambled characters. Instead of something like kX7#mQ2@, you get something like eagle-cabin-maple-frost. Both may offer similar security — but the latter is dramatically easier to type, remember, and share verbally when needed.
Passphrases were popularized by Randall Munroe's famous XKCD comic "Password Strength," which illustrated that four random common words create a stronger and more memorable password than a complicated-looking but short random string. The concept is rooted in cryptographic principles: security comes from entropy (unpredictability), not from visual complexity.
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Security in passphrases is measured in bits of entropy — a mathematical measure of unpredictability. Each word drawn from a pool of 1,000 words contributes about 9.97 bits of entropy (log₂ of 1,000). A 4-word passphrase therefore has approximately 40 bits of entropy, and a 6-word passphrase has about 60 bits.
To put that in context: modern recommendations from NIST (the U.S. National Institute of Standards and Technology) suggest that memorized secrets need at least 20–30 bits of entropy when stored with slow hashing algorithms. A 4-word passphrase comfortably exceeds this. For offline cracking scenarios — where an attacker has stolen a password database — 50+ bits is generally considered strong.
Random character passwords pack more entropy per character but are notoriously hard to remember. A typical 8-character random password using uppercase, lowercase, digits, and symbols has about 52 bits of entropy — but most people immediately write it down or store it insecurely, negating the security benefit. A 5-word passphrase achieves similar entropy while remaining genuinely memorable.
The practical advantage is that passphrases can be typed accurately without a password manager, spoken aloud to a colleague (useful for shared systems), and memorized across multiple sessions without lookups. They also tend to resist shoulder-surfing because the typing is natural and unhurried.
The separator between words affects readability, entropy (slightly), and compatibility with password fields. Here's a quick breakdown:
Many websites still enforce password policies requiring uppercase letters, numbers, or symbols. Our Capitalize option converts the first letter of each word to uppercase (e.g., Eagle-Cabin-Maple-Frost), satisfying uppercase requirements without creating complexity you have to remember.
The Insert Number option injects a two-digit random number at a random position in the passphrase, satisfying digit requirements. These additions contribute modestly to entropy — a few extra bits — but their primary value is compliance with legacy password policies rather than dramatically increasing security.
If your site requires a symbol (!, @, etc.) you can manually append one to any generated passphrase. Choosing a consistent symbol you always append (like appending ! to every passphrase) is a reasonable approach — you don't need to randomize the symbol for most purposes since the primary entropy comes from the word selection.
Password Manager Master Password: This is the most critical passphrase you'll ever create. Use 6–8 words (60–80 bits of entropy) and commit it to memory without writing it down. This is one case where the memorability advantage of passphrases is absolutely essential — you cannot rely on the password manager to remember its own master key.
SSH Key Passphrase: SSH passphrases protect your private key file. A 5–6 word passphrase is appropriate. Since you typically type this less frequently (SSH agents cache it), you can go longer without the memorability cost becoming prohibitive.
Full Disk Encryption (LUKS, BitLocker, FileVault): Use 6+ words. Disk encryption protects against physical theft, and strong passphrases are especially important here because offline cracking is more feasible without network rate-limiting.
Everyday Website Accounts: 4 words is fine for most sites, especially when combined with two-factor authentication. With 2FA enabled, the passphrase mainly needs to resist online attacks — where rate limiting and account lockouts already provide significant protection.
Diceware is the original passphrase generation method, invented by Arnold Reinhold in 1995. It uses physical dice to select words from a 7,776-word list (6⁵ words), providing about 12.9 bits of entropy per word. Rolling 5 dice and looking up the result ensures true random selection with no computational components to compromise.
Our tool uses a smaller 1,000-word list for memorability — focusing on common, familiar words — and relies on the browser's cryptographically secure random number generator (crypto.getRandomValues()) rather than physical dice. The result is slightly less entropy per word (~9.97 bits vs. 12.9) but more memorable passphrases. To match Diceware's 5-word entropy, use 6–7 words in our tool.
The beauty of passphrases is that the most important ones — your master password, disk encryption key, and a few critical accounts — can be memorized genuinely. For everything else, use a password manager. Generate a unique passphrase for every account, store them in your manager, and only commit the master passphrase to memory.
Avoid writing passphrases in plain text files, emails, or unencrypted notes. If you need a physical backup for your master passphrase, write it on paper and store it in a physically secure location (a safe, a locked drawer, or with a trusted person). Paper is immune to remote hacking and doesn't expire.