Generate SHA-3 (Keccak[c=2d])

Compute a SHA-3 (Keccak sponge) digest with selectable output length: 224, 256, 384, or 512 bits. SHA-3 is the FIPS 202 standard and uses a different internal design from SHA-2, making it a useful alternative when protocols ask specifically for SHA-3 or when diversity of hash algorithms matters.

Algorithm

SHA-3 absorbs the message into a Keccak-f[1600] sponge and squeezes out the requested bit length. This tool uses crypto-js SHA-3 with the chosen outputLength and returns hex. Default demos often use 512-bit output; shorter lengths truncate the sponge output accordingly while remaining distinct algorithms in the SHA-3 family.

When to use it

• Protocols or homework that mandate SHA-3 instead of SHA-2
• Side-by-side comparison of digest lengths for the same plaintext
• Experimenting with post-SHA-2 hash options without installing CLI tools

Limitations

SHA-3 is not a drop-in wire-compatible replacement for SHA-2 in every standard—verify what your peer expects. Raw digests are still unsuitable as password hashes. Implementation speed in JavaScript is slower than native Web Crypto SHA-2 for large payloads.

Example

Hello with SHA-3-512 yields c33fede18a1ae53ddb8663710f8054866beb714044fce759790459996196f101d94dfc7bd8268577f7ee3d2f8ff0cef4004a9632227db84df62d2b40682d69e2.

This skill is available over A2A JSON-RPC and REST. When you already know the skill id and export, call execute directly—no discovery step required.

REST example

curl -sS -X POST https://toolplaza.app/api/helpers/execute \
  -H 'Content-Type: application/json' \
  -d '{"skillId":"hashing__SHA-3","export":"hashSha3","args":["Hello"]}'

A2A JSON-RPC example

Send POST https://toolplaza.app/api/a2a with:

{
  "jsonrpc": "2.0",
  "id": "1",
  "method": "message/send",
  "params": {
    "message": {
      "messageId": "uuid",
      "role": "user",
      "parts": [
        {
          "kind": "text",
          "text": "ignored"
        }
      ]
    },
    "metadata": {
      "toolplaza": {
        "skillId": "hashing__SHA-3",
        "export": "hashSha3",
        "args": [
          "Hello"
        ]
      }
    }
  }
}

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