Passphrase Generator — Create Memorable, Uncrackable Passphrases

Generate random word passphrases that are both strong and easy to remember. Powered by the EFF Diceware wordlist with 7,776 carefully curated words.

Why Passphrases Beat Passwords

The famous XKCD comic illustrated it perfectly: “correct horse battery staple” is both easier to remember and harder to crack than “Tr0ub4dor&3”. Random words provide high entropy while remaining memorable because our brains are wired to remember narratives, not arbitrary character strings.

Each word from the EFF wordlist adds approximately 12.9 bits of entropy (log₂(7,776) ≈ 12.92). Five words provide ~64.6 bits — equivalent to a strong random password. Six words (~77.5 bits) would take centuries to crack even with dedicated hardware.

How Many Words Do You Need?

✓4 words (~51.7 bits) — Moderate security for low-value accounts
✓5 words (~64.6 bits) — Strong security, recommended minimum for important accounts
✓6 words (~77.5 bits) — High security for master passwords and encryption
✓7+ words (~90+ bits) — Maximum security for critical systems

Generate your passphrase below — passphrase mode is already selected.

🔒 100% Client-Side🚫 No Data Stored🛡️ CSPRNG Secured📡 Zero Server Calls
Very Weak
Entropy: 0.0 bits

Passphrases use random words instead of random characters. They're easier to remember and type, but just as secure. A 5-word passphrase has roughly the same strength as a 13-character random password.

Security Tips

Use a unique password for every account

If one account gets breached, every account sharing that password is compromised. A password manager makes this practical.

Length beats complexity

A 20-character password with just lowercase letters is stronger than an 8-character password with all character types. When in doubt, make it longer.

Passphrases are your friend

Random word combinations are both strong and memorable. Use 5+ words for serious security. Great for master passwords you type frequently.

Never reuse passwords

Data breaches happen constantly. If your email and bank share a password, one breach exposes both. Use a password manager.

Enable two-factor authentication (2FA)

Even the strongest password can be phished. 2FA adds a second layer requiring physical access to your phone or security key.

How Password Generation Works

This tool uses your browser's built-in Cryptographic Random Number Generator (CSPRNG) — specifically crypto.getRandomValues() — to generate passwords. This is the same source of randomness used by operating systems, encryption software, and professional security tools.

For random passwords: The tool builds a character pool from your selected options, then picks characters using the CSPRNG. A Fisher-Yates shuffle ensures required characters are distributed randomly throughout.

For passphrases: Words are selected from the EFF's curated wordlist of 7,776 common English words. Each word adds approximately 12.9 bits of entropy.

For strength checking: We use zxcvbn, an open-source library from Dropbox that detects dictionary words, common names, dates, keyboard patterns, l33t speak, and repeated characters — simulating how attackers actually crack passwords.

Related Tools

QR Code Generator

Generate QR codes for URLs, WiFi, contacts, and more

Image Compressor

Compress, resize, and convert images in your browser

True Hourly Rate Calculator

Find out what you actually make per hour after all costs

Meeting Cost Calculator

See the real cost of meetings with live timer

Subscription Calculator

Audit your subscriptions and see annual totals