Convert PNG to 8-bit PNG

Convert PNG images to 8-bit color depth for smaller file size and better compatibility

file· File result

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/png-to-8bit-png' \
  -F 'file=@/path/to/imageFile.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/png-to-8bit-png' \
  -F 'imageFile=/path/to/file.ext' \
  -F 'quality=90' \
  -F 'compressionLevel=9' \
  -F 'adaptiveFiltering=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/png-to-8bit-png

Parameters

Name	Type	Required	Description
imageFile	fileupload required	Yes	—
quality	range	No	Quality of the 8-bit conversion process
compressionLevel	range	No	0 = no compression, 9 = maximum compression
adaptiveFiltering	checkbox	No	Use adaptive filtering for better compression

File-type parameters must be uploaded first via POST /upload/png-to-8bit-png, then the returned filePath is passed to the corresponding file field.

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-png-to-8bit-png": {
      "name": "png-to-8bit-png",
      "description": "Convert PNG images to 8-bit color depth for smaller file size and better compatibility",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=png-to-8bit-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": "png-to-8bit-png",
    "arguments": {
  "imageFile": "https://example.com/file.ext",
  "quality": 90,
  "compressionLevel": 9,
  "adaptiveFiltering": 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).

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)"
}

Convert PNG to 8-bit PNG — API & MCP | Elysia Tools