Convert ICO to PNG

Convert ICO icon files to PNG format with transparency support and customizable output options

file· File resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

# 1) Request a presigned URL → returns { uploadUrl, storageKey }
curl -X POST 'https://api.elysiatools.com/api/upload/presign/ico-to-png' \
  -H 'Content-Type: application/json' \
  -d '{"filename":"icoFile.ext","contentType":"application/octet-stream","size":12345}'

# 2) PUT the file bytes directly to the presigned uploadUrl
curl -X PUT '<presigned uploadUrl>' \
  --data-binary @/path/to/file.ext

# 3) Call the tool, passing the returned storageKey for each file field
curl -X POST 'https://api.elysiatools.com/en/api/tools/ico-to-png' \
  -F 'icoFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
  -F 'width=0' \
  -F 'height=0' \
  -F 'extractSize=auto' \
  -F 'compressionLevel=9' \
  -F 'adaptiveFiltering=true' \
  -F 'preserveTransparency=true'

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/ico-to-png

Parameters

Name	Type	Required	Description
icoFile	fileupload required	Yes	—
width	number	No	Output width in pixels (optional)
height	number	No	Output height in pixels (optional)
extractSize	select	No	—
compressionLevel	range	No	PNG compression level (0=fastest/largest, 9=slowest/smallest)
adaptiveFiltering	checkbox	No	Enable adaptive filtering for better compression
preserveTransparency	checkbox	No	Keep ICO transparency in output PNG

File-type parameters must be uploaded first via POST /upload/ico-to-png, 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-ico-to-png": {
      "name": "ico-to-png",
      "description": "Convert ICO icon files to PNG format with transparency support and customizable output options",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=ico-to-png",
      "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": "ico-to-png",
    "arguments": {
  "icoFile": "https://example.com/file.ext",
  "width": 0,
  "height": 0,
  "extractSize": "auto",
  "compressionLevel": 9,
  "adaptiveFiltering": true,
  "preserveTransparency": true
}
  }
}

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]