Shannon entropy

Client

Higher entropy suggests more randomness—does not measure keyboard patterns.

About Shannon entropy

Bits of entropy per symbol for pasted text—password/passphrase analysis. The interactive transform on this page runs in your browser tab—Toolcore does not need your paste for the core operation described above.

How to use this page

Paste or type in the main workspace, run the primary action from the toolbar, then copy or download the result. Use Load example when the page offers it, or URL prefill (?q= / ?qb=) so agents and tickets open the same input.

Limits and safety

Utilities here are for development and inspection—do not paste live production keys, PANs, or recovery codes into any browser tab you do not control.

Entropy ≈ 1.0000 bits/char · 8.00 bits total

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.
  • Hash identifier — Guess digest type from hex length, Base64 shape, or bcrypt/Argon2 prefixes—heuristic, local only. 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.
  • Character frequency — Count how often each character appears—sorted table with Unicode code points; local only. before you trust a token, digest, or key material in production.

Common use cases

  • Shannon entropy 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.