Generate SHA-2

Compute a SHA-2 family digest—SHA-256 or SHA-512—from text using the Web Crypto SubtleCrypto API. SHA-2 remains the mainstream choice for integrity checks, HMAC constructions, and modern certificate fingerprints when a collision-resistant hash is required.

Algorithm

You select SHA256 (256-bit / 64 hex chars) or SHA512 (512-bit / 128 hex chars). The browser encodes the input as UTF-8 bytes and runs crypto.subtle.digest with the matching algorithm name. Output is lowercase hex. SHA-512 uses a 64-bit word size internally and is often faster on 64-bit CPUs despite the longer digest.

When to use it

• Checksums for releases, config blobs, or API payload integrity demos
• Comparing SHA-256 vs SHA-512 output length for the same message
• Replacing MD5/SHA-1 fingerprints in documentation with a current algorithm

Limitations

Hashing is not encryption: anyone can recompute the digest. Do not store passwords with raw SHA-2—use a password KDF (Argon2, scrypt, bcrypt). Web Crypto availability and performance depend on the browser environment. Extremely large in-memory strings may hit browser limits.

Example

Hello under SHA-256 yields 185f8db32271fe25f561a6fc938b2e264306ec304eda518007d1764826381969. The same string under SHA-512 yields 3615f80c9d293ed7402687f94b22d58e529b8cc7916f8fac7fddf7fbd5af4cf777d3d795a7a00a16bf7e7f3fb9561ee9baae480da9fe7a18769e71886b03f315.

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-2","export":"shaDigest","args":["SHA-256","Hello World"]}'

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-2",
        "export": "shaDigest",
        "args": [
          "SHA-256",
          "Hello World"
        ]
      }
    }
  }
}

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