Diceware Passphrase Generator
Generate strong, memorable passphrases from random words using the EFF wordlist and the browser CSPRNG — with a live entropy estimate in bits.
About Diceware Passphrase Generator
Diceware Passphrase Generator creates strong, memorable passphrases from random words using the browser's secure random generator, with a live entropy estimate — far easier to remember and type than a symbol-jumble while being just as hard to crack.
How to use Diceware Passphrase Generator
- 1Paste or type your input into the box above — a sample is pre-filled so you can try it instantly.
- 2Set any options on offer (mode, key, format) to match what you need.
- 3The result appears the moment you type — no button to press, no waiting.
- 4Click Copy to grab the output — Diceware Passphrase Generator keeps everything on your device.
Why use Diceware Passphrase Generator?
- ✓Creating a master password for a password manager you must memorise
- ✓Generating a strong Wi-Fi or disk-encryption passphrase
- ✓Teaching why word-based passphrases beat short complex passwords
- ✓100% free with no sign-up, no watermark and no usage limits
- ✓Runs entirely in your browser — your text and keys are never uploaded, stored or logged
- ✓Works offline once loaded, with instant results and one-click copy
Frequently asked questions
How many words do I need for a strong passphrase?+
Each word adds roughly 9–13 bits of entropy depending on the wordlist size. Six words is the common recommendation, giving enough entropy (50–77 bits) that the passphrase itself — not the wordlist — is the secret. Use more words for high-value accounts.
Why are passphrases better than complex passwords?+
Human memory handles words far better than random symbols, so people choose longer, higher-entropy secrets they can actually recall — and stop reusing weak ones. A six-word passphrase is both easier to type and stronger than something like 'Tr0ub4dor&3'.
Is it free to use?+
Yes — completely free with no sign-up, no account and no usage limits. There is no paywall, so you can encode, decode and convert as much as you like.
Is my data private and secure?+
Yes. This tool runs entirely in your browser using client-side JavaScript — your input is never uploaded to a server, stored or logged. Once the page has loaded you can use it offline, which makes it safe for tokens, keys and confidential data.
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