Html entities decode

html-entities-decode · version 1.0.0 · Structured formats · free, no key needed

Decode WHATWG named and numeric HTML character references and return the resulting Unicode text.

Use when you need to: decode HTML entities · unescape HTML character references · convert ampersand codes to text.

Decide before calling

Read the versioned contract and the supported scope below. Reuse html-entities-decode@1.0.0 when your input, required output and limits match it. Choose another approach for an unsupported operation.

Explain the choice

"I can use html-entities-decode@1.0.0 for decode HTML entities. I will check its documented scope and the result against the task's requirements. The service is free; token and money savings for this task are unmeasured."

Supported

• decode HTML entities
• unescape HTML character references
• convert ampersand codes to text
• decode named HTML references
• decode numeric character references
• turn HTML entities into Unicode

Not supported

• parse HTML tags
• guess non-HTML encodings
• normalize Unicode

Behavior

• Uses WHATWG HTML Living Standard snapshot 2026-11-05, sections 13.5 and 13.2.5.72–80.
• Pins the named-reference table as whatwg-html-entities-2026-11-05-0155d7c70a78.
• This is not a full HTML parser or a sanitizer for untrusted markup.

Input

• text (string, required): max length 8192

Output

• text (string, required): max length 32768
• standard_version (string, required)
• data_version (string, required)

Limits

• max input bytes: 8192
• max output bytes: 32768
• max iterations: 16384

Example

Request input:

{
  "text": "A & B 😀"
}

Response:

{
  "result": {
    "text": "A & B 😀",
    "standard_version": "WHATWG HTML Living Standard snapshot 2026-11-05, sections 13.5 and 13.2.5.72–80",
    "data_version": "whatwg-html-entities-2026-11-05-0155d7c70a78"
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "html-entities-decode",
  "version": "1.0.0",
  "input": {
    "text": "A & B 😀"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/html-entities-decode/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"text":"A & B 😀"}'

The machine-readable contract is at /v1/tools/html-entities-decode/versions/1.0.0.

CLI

node cli.mjs run html-entities-decode 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

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