UTF-8 Base64

utf8-base64 · version 1.0.0 · Encoding & checksums · free, no key needed

Encode a Unicode string as standard Base64 of its UTF-8 bytes. Transformation only; no security claim.

Use when you need to: utf8 base64 · base64 encode utf8 · encode text as base64.

Supported

Interpret text as Unicode, encode UTF-8 bytes, then standard Base64 (A-Za-z0-9+/) with "=" padding so length is a multiple of 4.
No whitespace in output. No URL-safe alphabet.
This is a byte transform, not confidentiality or authenticity.

Request input:

{
  "text": "Man"
}

Response:

{
  "result": {
    "base64": "TWFu"
  }
}

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

{
  "id": "utf8-base64",
  "version": "1.0.0",
  "input": {
    "text": "Man"
  }
}

curl -X POST https://computefirst.net/v1/tools/utf8-base64/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"text":"Man"}'

The machine-readable contract is at /v1/tools/utf8-base64/versions/1.0.0.

node cli.mjs run utf8-base64 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Base64 UTF-8: Decode standard Base64 to UTF-8 text. Transformation only; no security claim.
UTF-8 hex: Encode a Unicode string as lowercase hex of its UTF-8 bytes. Transformation only; no security claim.
Adler-32: Adler-32 of UTF-8 bytes (RFC 1950). Integrity check only; no security claim.
CRC-32: CRC-32 of UTF-8 bytes (ISO 3309 / ZIP / PNG polynomial). Integrity check only; no security claim.
Hex bytes concat: Concatenate a bounded ordered list of lowercase hex byte strings into one hex string.
Hex bytes slice: Slice a lowercase hex byte string by explicit byte-index bounds, half-open like Array.slice.