Entropy bits estimate

Client

Randomness estimate for strings.

Entropy bits estimate

Shannon entropy in bits from character frequencies in pasted text—not cryptographic key strength. Processing runs in your browser—Toolcore does not need your paste for the core operation on this page.

Demo digests are not FIPS-validated or side-channel hardened.

How to use

Paste or type in the main field, then read the output below. Use Load example when available, or open the page with ?q= / ?qb= so tickets and agents share the same input.

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Nearby workflows on Toolcore

  • Hash identifier — Guess digest type from hex length, Base64 shape, or bcrypt/Argon2 prefixes—heuristic, local only. Useful before you trust digest output in production.
  • Password bits estimate (lite) — Entropy bits from length and charset size. Useful before you trust digest output in production.
  • Character frequency — Count how often each character appears—sorted table with Unicode code points; local only. Useful before you trust digest output in production.
  • Password strength — Heuristic password strength meter—length, charset mix, common weak-password warnings; local only. Useful before you trust digest output in production.

Common use cases

  • Entropy bits estimate 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.