Encoding Utilities

Hex Decode

Converts hexadecimal strings back to readable text using deterministic decoding. Access via MCP in Cursor or Windsurf, or call GET /v1/encode/hex/decode directly. Input "48656c6c6f20576f726c64" returns "Hello World". Handles both uppercase and lowercase hex formats, making it essential for debugging encoded data in AI workflows.

API Endpoint

GET /v1/encode/hex/decode

Code Examples

curl "https://tinyfn.io/v1/encode/hex/decode" \
  -H "X-API-Key: YOUR_API_KEY"
const response = await fetch('https://tinyfn.io/v1/encode/hex/decode', {
  headers: { 'X-API-Key': 'YOUR_API_KEY' }
});
const data = await response.json();
console.log(data);
import requests

response = requests.get('https://tinyfn.io/v1/encode/hex/decode',
    headers={'X-API-Key': 'YOUR_API_KEY'})
data = response.json()
print(data)

Use via MCP

Add to your AI agent

Connect your AI agent (Claude, Cursor, Windsurf, etc.) to TinyFn's encoding tools:

{
  "mcpServers": {
    "tinyfn-encoding": {
      "url": "https://tinyfn.io/mcp/encoding",
      "headers": {
        "X-API-Key": "YOUR_API_KEY"
      }
    }
  }
}

Learn more about MCP setup →

Related Tools

Base64 Encode
Encode text to base64. Properly handles Unicode.
Base64 Decode
Decode base64 to text.
Url Encode
URL encode text.
Url Decode
URL decode text.
Html Encode
HTML encode text (escape special characters).
Html Decode
HTML decode text (unescape special characters).
Hex Encode
Encode text to hexadecimal.
Binary Encode
Encode text to binary.

FAQ

How do I decode hex strings using MCP in my AI editor?

Call the hex decode tool with your hex string as input. Works in Cursor, Windsurf, and other MCP-enabled editors for instant conversion without manual calculation.

What format should my hex string be in?

Standard hexadecimal format — pairs of characters 0-9 and A-F (case insensitive). No 0x prefix needed, spaces optional between pairs.

Can hex decode handle invalid or malformed hex strings?

Invalid characters or odd-length strings will return an error. Each pair must be valid hex digits to decode properly to ASCII/UTF-8 text.

What's the difference between hex decode and base64 decode?

Hex uses 16 characters (0-F) with 2 chars per byte, while base64 uses 64 characters with ~1.33 chars per byte. Choose based on your encoded format.

Does hex decode work with non-ASCII text like emoji?

Yes, it decodes any valid UTF-8 byte sequence. Multi-byte characters like emoji will decode correctly if the hex represents valid UTF-8 encoding.

Try Hex Decode Now

Get your free API key and start using Hex Decode in seconds.

Get Free API Key