Design

Image Levels Adjustment

Adjust image levels with precise control over shadows, midtones, and highlights for professional tonal correction

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-levels' \
  -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-levels' \
  -F 'imageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
  -F 'shadowInput=0' \
  -F 'shadowOutput=0' \
  -F 'midtoneInput=0.5' \
  -F 'midtoneOutput=0.5' \
  -F 'highlightInput=1' \
  -F 'highlightOutput=1' \
  -F 'format=original' \
  -F 'quality=95'

Browse tools

Design

Image Levels Adjustment

Adjust image levels with precise control over shadows, midtones, and highlights for professional tonal correction

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-levels' \
  -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-levels' \
  -F 'imageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
  -F 'shadowInput=0' \
  -F 'shadowOutput=0' \
  -F 'midtoneInput=0.5' \
  -F 'midtoneOutput=0.5' \
  -F 'highlightInput=1' \
  -F 'highlightOutput=1' \
  -F 'format=original' \
  -F 'quality=95'

Name	Type	Required	Description
imageFile	fileupload required	Yes	Upload any image file (JPEG, PNG, WebP, GIF, BMP, TIFF) for levels adjustment
shadowInput	number	No	Shadow input level (0 = pure black, 1 = white). Maps input shadow levels to new values
shadowOutput	number	No	Shadow output level (0 = pure black, 1 = white). Sets the output for shadow areas
midtoneInput	number	No	Midtone input level (0 = pure black, 0.5 = middle gray, 1 = white). Controls tonal balance
midtoneOutput	number	No	Midtone output level (0 = pure black, 0.5 = middle gray, 1 = white). Adjusts overall brightness
highlightInput	number	No	Highlight input level (0 = pure black, 1 = white). Maps input highlight levels to new values
highlightOutput	number	No	Highlight output level (0 = pure black, 1 = white). Sets the output for highlight areas
format	select	No	Choose output format or keep original. PNG recommended for maximum quality
quality	number	No	Output quality for lossy formats (JPEG, WebP). Higher = better quality but larger file size

Image Levels Adjustment

Quick start

Image Levels Adjustment

Quick start

API reference

Endpoint

Parameters

Response format

MCP integration

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