Passphrase Generator (Diceware)

Memorable passphrases from a published word list, with the entropy stated.

Settings

Generated in your browser with the operating system’s cryptographic random source. This page is ad-free and carries a policy blocking every outbound connection, because a third-party script would run in the same document as the phrase above.

Result

CHECK

54 bits — adequate, not comfortable

Fine behind a rate-limited login, thin against an offline attack on a leaked database. Six words or more is the range worth using for anything you would mind losing.

Passphrase
boulder-doctor-cartoon-bubble-east-earn
Diagnostic telemetry
Words
6
Word list size9 bits per word
512 words
Entropy
54 bits
Characters
39
Offline guessing timeAt 100 billion guesses a second against a fast hash — a deliberately pessimistic assumption
1 days

What this cannot tell you

  • Generated in your browser with the operating system's cryptographic random source. The phrase is never transmitted, and it is deliberately excluded from anything this page exports.
  • This page is ad-free and carries a policy blocking every outbound connection. A third-party script would execute in the same document as the generated phrase.
  • Entropy is calculated from the list size and the number of words, which is the only honest way to state it — and it is only valid because the words are chosen randomly. A phrase you assemble yourself from the same words has far less.
  • The guessing times quoted assume an offline attack at 100 billion guesses a second against a fast hash. That is deliberately pessimistic; anything behind a proper password hash or a rate-limited login is far better off.

Take this with you

This tool never saves runs. What it handles should not be written to disk — not even your own.

Passphrase Generator (Diceware) on RunTheTests — free browser-based security tools, no sign-up.