What is Entropy Checker?

Calculate Shannon entropy for tokens, passwords, and secrets. Detect weak passwords and predictable tokens.

Security Guide

Shannon entropy

Higher entropy = more random = harder to guess — verify tokens and API keys

Password strength thresholds

<3.0 bits/char = weak, 3.0-4.0 = moderate, 4.0+ = strong

Secret generation

Use 16+ random characters — avoid dictionary words → Hash Compare

Multi-factor authentication

Enable MFA on all accounts — even strong passwords can be phished

Password storage

Hash with bcrypt/Argon2 — never store plaintext → Hash Identifier