Curves Adjustment

Open in Editor

Apply smooth tone curve adjustments using control points across RGB or individual color channels.

How to use Curves Adjustment

  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 Curves Adjustment

Apply smooth tone curve adjustments using control points across RGB or individual color channels. 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.