imagetoolbox

Adjust brightness, contrast and saturation

Three sliders with a live preview. Brighten a dark photo, add punch with contrast or pull the colours back.

How to adjust brightness, contrast and saturation

  1. Drop an image in the zone above.
  2. Drag the sliders. The preview updates live, and Reset takes you back to the original.
  3. Choose an output format and download.

About adjusting images here

Brightness lifts or darkens everything evenly, contrast pushes lights and darks apart, and saturation controls how vivid the colours are. Saturation all the way down gives a clean black and white.

The preview and the download run the exact same maths, so what you see is precisely what you get, at the original resolution.

Like everything on this site, the tool runs entirely in your browser. Your image is never uploaded, and the server only serves this page.

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Everything runs in your browser. Your files never leave your device. No uploads, no accounts.