Media

Image Canvas Extender

Basic image canvas extension tool for adding space around images with various fill strategies

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-extend' \
  -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-extend' \
  -F 'imageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
  -F 'extendMode=uniform' \
  -F 'extendWith=background' \
  -F 'backgroundColor=#ffffff' \
  -F 'uniformPadding=50' \
  -F 'topPadding=0' \
  -F 'rightPadding=0' \
  -F 'bottomPadding=0' \
  -F 'leftPadding=0' \
  -F 'format=original' \
  -F 'quality=90'

Browse tools

Media

Image Canvas Extender

Basic image canvas extension tool for adding space around images with various fill strategies

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-extend' \
  -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-extend' \
  -F 'imageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
  -F 'extendMode=uniform' \
  -F 'extendWith=background' \
  -F 'backgroundColor=#ffffff' \
  -F 'uniformPadding=50' \
  -F 'topPadding=0' \
  -F 'rightPadding=0' \
  -F 'bottomPadding=0' \
  -F 'leftPadding=0' \
  -F 'format=original' \
  -F 'quality=90'

Name	Type	Required	Description
imageFile	fileupload required	Yes	Upload any image file (JPEG, PNG, WebP, TIFF, GIF, BMP)
extendMode	select	Yes	Choose how to extend the image canvas
extendWith	select	Yes	Choose how to fill the extended area
backgroundColor	color	No	Background color for the extended area (default: white)
uniformPadding	number	No	Padding to add on all sides when using uniform mode
topPadding	number	No	Padding to add to the top edge
rightPadding	number	No	Padding to add to the right edge
bottomPadding	number	No	Padding to add to the bottom edge
leftPadding	number	No	Padding to add to the left edge
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

Image Canvas Extender

Quick start

Image Canvas Extender

Quick start

API reference

Endpoint

Parameters

Response format

MCP integration

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