Design

Image Trim Whitespace

Remove whitespace and empty margins from images by detecting and trimming blank areas

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/image-trim-whitespace' \
  -H 'Content-Type: application/json' \
  -d '{"filename":"imageFile.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/image-trim-whitespace' \
  -F 'imageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
  -F 'sensitivity=210' \
  -F 'checkColor=true' \
  -F 'checkTransparency=true' \
  -F 'analyzeOnly=false' \
  -F 'format=original' \
  -F 'quality=90'

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/image-trim-whitespace

Parameters

Name	Type	Required	Description
imageFile	fileupload required	Yes	Upload any image file (JPEG, PNG, WebP, GIF, BMP, TIFF) for whitespace trimming
sensitivity	range	No	Brightness threshold for whitespace (128-255). Higher = more pixels considered whitespace
checkColor	checkbox	No	Analyze pixel brightness to detect white/light areas as whitespace
checkTransparency	checkbox	No	Treat fully or partially transparent pixels as whitespace
analyzeOnly	checkbox	No	Analyze the image to find whitespace boundaries without creating a trimmed file
format	select	No	Choose output format or keep original
quality	number	No	Output quality for lossy formats (JPEG, WebP). Higher = better quality but larger file size

File-type parameters must be uploaded first via POST /upload/image-trim-whitespace, 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-image-trim-whitespace": {
      "name": "image-trim-whitespace",
      "description": "Remove whitespace and empty margins from images by detecting and trimming blank areas",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=image-trim-whitespace",
      "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": "image-trim-whitespace",
    "arguments": {
  "imageFile": "https://example.com/file.ext",
  "sensitivity": 210,
  "checkColor": true,
  "checkTransparency": true,
  "analyzeOnly": false,
  "format": "original",
  "quality": 90
}
  }
}

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]