Diceware Passphrase Generator
What is a Diceware Passphrase Generator?
Generate memorable, high-entropy passphrases (e.g. `correct-horse-battery-staple`) using official Electronic Frontier Foundation (EFF) 7,776-word lists and cryptographic random dice rolls.
Why Use This Tool?
- Memorable Strong Passwords: Create passphrases that are easy for humans to memorize but virtually uncrackable for computers.
- Master Passwords for Password Managers: Generate high-entropy master passwords for 1Password, Bitwarden, or KeePass.
- High-Entropy Security: Achieve 80+ bits of cryptographic entropy without confusing symbols.
How to Use
- Select Word Count (e.g. `4`, `5`, or `6` words).
- Select Wordlist (EFF Long Wordlist recommended) and Separator (hyphen, space, or number).
- Click Generate and copy your high-entropy passphrase.
Real Working Example
Input:
Word Count: 5 Words | Wordlist: EFF Large | Separator: Hyphen (-)
Output Result:
Generated Passphrase: correct-horse-battery-staple-dragon Entropy: ~64.6 Bits (Uncrackable by offline GPUs)
Important Technical Details & Security Standards
- EFF 7776 Wordlist Database: Uses EFF Large 5-dice wordlist (7,776 unique curated words).
- Cryptographic 5-Dice Entropy Math: Each word adds $\log_2(7776) \approx 12.92$ bits of true entropy.
- 100% Local Browser Engine: Zero server network requests.
Related Security & Crypto Tools
- Password Strength Analyzer: Audit password entropy and crack time.
- Token Generator: Generate random tokens.
- BIP39 Passphrase Generator: Generate BIP39 crypto seed phrases.
Frequently Asked Questions
What is Diceware?
Diceware is a method for creating random, highly secure passphrases by using dice rolls to select random words from a numbered dictionary.
Why are Diceware passphrases better than traditional passwords?
Diceware passphrases combine high cryptographic entropy (length) with human memorability, eliminating weak short passwords.
How many bits of entropy does a 5-word EFF passphrase provide?
A 5-word EFF passphrase provides ~64.6 bits of entropy; 6 words provide ~77.5 bits.
Is it free?
Yes, 100% free.
Are generated passphrases logged on a server?
No, all passphrase generation executes 100% locally in your web browser.
Can I add numbers or capital letters to Diceware passphrases?
Yes, toggle "Capitalize Words" or "Include Numbers" options.