Text unicode normalization check

text-unicode-normalization-check · version 1.0.0 · Text · free, no key needed

Check if a text string is in various Unicode normalization forms (NFC, NFD, NFKC, NFKD).

Use when you need to: text unicode normalization check · check unicode normalization · is text nfc.

Supported

• text unicode normalization check
• check unicode normalization
• is text nfc

Not supported

• normalize text
• fix encoding
• detect encoding

Behavior

• Checks the provided string against the four standard Unicode normalization forms.
• Returns true for a form if the string is identical to its normalized version in that form.
• Assumes the input is valid UTF-16 (JavaScript strings).

Input

• text (string, required): max length 1048576

Output

• is_nfc (boolean, required)
• is_nfd (boolean, required)
• is_nfkc (boolean, required)
• is_nfkd (boolean, required)

Limits

• max text bytes: 1048576

Example

Request input:

{
  "text": "é"
}

Response:

{
  "result": {
    "is_nfc": true,
    "is_nfd": false,
    "is_nfkc": true,
    "is_nfkd": false
  }
}

How to call it

MCP

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

{
  "id": "text-unicode-normalization-check",
  "version": "1.0.0",
  "input": {
    "text": "é"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/text-unicode-normalization-check/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"text":"é"}'

The machine-readable contract is at /v1/tools/text-unicode-normalization-check/versions/1.0.0.

CLI

node cli.mjs run text-unicode-normalization-check 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• Text NFC: Normalize Unicode text to NFC (canonical composition).
• Text indentation detect: Detect whether a text uses tabs or spaces for indentation by counting lines.
• Text NFD: Normalize Unicode text to NFD (canonical decomposition).
• Text prefix suffix check: Exact prefix and/or suffix boolean checks using JS string startsWith/endsWith.
• Text slice codepoints: Slice a string by Unicode code-point indexes, not UTF-16 code units.
• Text apply unified patch: Apply a one-file unified patch to text at original line addresses with exact hunk matches.