Change brightness and contrast on this device
Move two sliders, then download. Right makes a photo lighter or punchier. Left darkens it or flattens it. Nothing is uploaded.
- Fast
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Drop images anywhere on this page
JPG, PNG, WebP, GIF, SVG, HEIC, or AVIF. Your photos stay on this device.
When to use this
Use this when a phone photo is too dark, a scan looks washed out, or a product shot needs a bit more punch before you send it. The pixels stay the same size. Only the light and the contrast change.
Brightness adds or removes light across the whole picture. Contrast pushes light areas lighter and dark areas darker, or pulls them toward a flat middle. Zero on both sliders leaves the picture as it is, apart from saving it in the format you pick.
JPG cannot store a clear background. If the source has empty pixels, a JPG fills them with white before the sliders run. Keep PNG when you still need those pixels clear. WebP can keep them too.
After the change, compress if the file is still heavy, or crop if you only want part of the picture.
How to do it
- Drop one image or a batch. Files stay on this device.
- Move brightness to lighten or darken, and contrast to strengthen or flatten.
- Pick JPG, PNG, or WebP, and set the quality if you are not saving PNG.
- Apply, then download each file or a zip of the batch.
Tips
- A small move is usually enough. Going to either end blows the picture out or turns it grey.
- Zero on both sliders keeps the look and only changes the file format.
- JPG fills clear pixels with white. Use PNG if you still need transparency.
- Quality around 0.92 is a good balance for JPG and WebP.