Auto Contrast

Open in Editor

Automatically optimize image dynamic range and contrast by expanding shadow and highlight tones to span the full spectrum.

How to use Auto Contrast

  1. Upload your image using drag & drop or click to browse.
  2. Adjust the settings using the controls above.
  3. See the result instantly — processing happens in your browser.
  4. Download your processed image as a PNG file.

About Auto Contrast

Automatically optimize image dynamic range and contrast by expanding shadow and highlight tones to span the full spectrum. This tool is part of ImageToolbox's collection of free online image tools. It runs entirely in your browser — your images are never uploaded to our servers.