Security

Excel Field-Level Encryptor

Encrypt specific fields in Excel files using various encryption methods to protect sensitive information

file· File resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

# 1) Upload each file first → returns { filePath }
curl -X POST 'https://api.elysiatools.com/upload/excel-field-encryptor' \
  -F 'file=@/path/to/excelFile.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/excel-field-encryptor' \
  -F 'excelFile=/path/to/file.ext' \
  -F 'encryptionMethod=base64' \
  -F 'selectedFields=Comma-separated field names (e.g., Email,Phone,SSN). Leave empty to encrypt all fields.' \
  -F 'encryptionKey=Enter encryption key (required for AES encryption)' \
  -F 'caesarShift=3' \
  -F 'worksheetIndex=0' \
  -F 'hasHeader=true' \
  -F 'outputFormat=excel' \
  -F 'encryptedOnly=false'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/excel-field-encryptor

Parameters

Name	Type	Required	Description
excelFile	fileupload required	Yes	—
encryptionMethod	select	Yes	—
selectedFields	text	No	Specify which Excel columns to encrypt. If empty, all fields will be encrypted by default.
encryptionKey	text	No	Only required for AES encryption method. Use a strong, secure key.
caesarShift	number	No	Number of positions to shift for Caesar cipher (1-25)
worksheetIndex	number	No	Index of worksheet to process (0 for first worksheet, 1 for second, etc.)
hasHeader	checkbox	No	Treat first row as column headers
outputFormat	select	Yes	—
encryptedOnly	checkbox	No	Skip detailed analysis and only output encrypted data

File-type parameters must be uploaded first via POST /upload/excel-field-encryptor, then the returned filePath is passed to the corresponding file field.

Response format

File result

JSON

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-excel-field-encryptor": {
      "name": "excel-field-encryptor",
      "description": "Encrypt specific fields in Excel files using various encryption methods to protect sensitive information",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=excel-field-encryptor",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "excel-field-encryptor",
    "arguments": {
  "excelFile": "https://example.com/file.ext",
  "encryptionMethod": "base64",
  "selectedFields": "Comma-separated field names (e.g., Email,Phone,SSN). Leave empty to encrypt all fields.",
  "encryptionKey": "Enter encryption key (required for AES encryption)",
  "caesarShift": "3",
  "worksheetIndex": "0",
  "hasHeader": true,
  "outputFormat": "excel",
  "encryptedOnly": false
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

File parameters accept a public file URL only (https://…). Local paths, data: URIs, and Base64 strings are not supported.

Questions or issues? Contact [email protected]