What is Entropy?

In information theory, entropy measures how unpredictable a value is, expressed in bits. Applied to passwords and keys, it estimates how much work a brute-force search would take.

5 tools that work with Entropy

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Hash & Crypto Tools4

Nano ID GeneratorGenerate compact URL-safe unique IDs — shorter than a UUID with comparable collision safety.Passphrase GeneratorGenerate memorable Diceware-style passphrases from random words.Password GeneratorGenerate strong random passwords using your browser's cryptographic random source.Password Strength CheckerEstimate how long a password would take to crack, and see exactly what weakens it.

AI & LLM Tools1

Temperature & Top-p VisualizerWatch sampling parameters change which tokens can actually be chosen, on a real softmax over logits you supply.

Related terms

Terms that appear alongside Entropy on the same tools.

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