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Free Security Tools

Secure Passphrase Generator

Create passwords that are impossible for machines to crack, but easy for you to remember. Uses cryptographic randomness — never Math.random().

100% Client-Side — Generated in your browser using crypto.getRandomValues(). Nothing is logged or transmitted.
Click Generate to start
Number of Words
4
Separator
Include a number at the end
Capitalize first letter of each word
Entropy
Crack time (offline, 1T guesses/sec)
Wordlist size 1,000 words

How This Keeps You Safe

Traditional complex passwords like P@ssw0rd1! are hard for humans but easy for cracking software using rule-based attacks.

A 4-word passphrase from a 1,000-word list has over 39 bits of entropy — equivalent to a random 7-character password, but vastly more memorable. Add more words for bank-grade security.

Entropy Guide

  • 3 words ~30 bits Weak — avoid
  • 4 words ~40 bits Good for most accounts
  • 5 words ~50 bits Strong — recommended
  • 6 words ~60 bits Very strong — banking/email

Why Passphrases Win

For humans: "correct-horse-battery-staple" is instantly memorable.

For computers: With 1,000 words and 4 positions, there are 1,000,000,000,000 possible combinations — taking billions of years to brute-force.

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