Passphrase strength

Client

Score passphrase length and charset diversity.

strong — ≈ 122 bits (heuristic); 4 word(s)

Nearby workflows on Toolcore

  • Password strength — Heuristic password strength meter—length, charset mix, common weak-password warnings; local only. before you trust a token, digest, or key material in production.
  • Password entropy (bits) — Estimate entropy from charset pool size and length—education only. before you trust a token, digest, or key material in production.
  • Diceware passphrase — Generate random diceware-style words from inline wordlist. before you trust a token, digest, or key material in production.
  • Random string generator — Random alphanumeric, hex, Base64 URL-safe, or custom tokens—entropy hint, local only. before you trust a token, digest, or key material in production.

About this tool

Heuristic entropy for multi-word passphrases.

Common use cases

  • Passphrase strength for quick local checks without uploading data.
  • Copy results into tickets, docs, or classroom notes.

Common mistakes to avoid

  • Unexpected input shape

    See the intro and how-to notes for accepted formats.

FAQ

Is processing local?

Yes—this runs entirely in your browser.

Agent prefill?

Use q or qb for the main text field when supported.

More tools

Related utilities you can open in another tab—mostly client-side.