Adjust Image Gamma Online Free
Runs 100% in your browser — your files never leave your device.
Open up muddy shadows on a dark monitor photo, or deepen mid-tones for richer contrast. Gamma applies a power curve that acts mostly on the mid-range, leaving pure black and white untouched. The adjustment runs locally on your device.
How it works
- 1
Add your image
Drop a JPG, PNG, or WebP into the box or click to browse. Nothing is uploaded.
- 2
Adjust gamma it
Tune the control until the effect looks right on your image.
- 3
Download the result
Click to apply and download the edited image in its original format.
About this tool
How the gamma curve works
Gamma applies a power curve that concentrates its effect on the mid-tones. Values below one open up shadows and mid-tones while pure black and white stay pinned in place; values above one deepen the middle range for a richer, moodier render.
When to reach for it
Use gamma when a photo looks right at the extremes but murky in the middle — dark restaurant interiors, dashcam stills, shadow-heavy landscapes. It lifts what needs lifting without flattening the highlights the way brightness does.
Tips for the best result
Displays assume a gamma of about 2.2, so an image corrected on one screen can look different on another. Judge the adjustment on the image itself, and if it looks washed out on a second screen, split the difference.
Frequently asked questions
Gamma or brightness — which should I use?
Brightness moves everything together; gamma moves the middle most. If your highlights and shadows look right but the mid-tones feel dark, gamma is the honest fix.
Will the original file change?
No — the gamma effect is applied to a working copy in memory. Your original file stays untouched on your device, and the download is a brand-new file.
Which formats and sizes work?
JPG, PNG, and WebP files up to 50 MB. The result downloads in the original format with dimensions unchanged.
Does gamma adjustment lose detail?
Extreme values compress the tonal steps at the extremes, which can band smooth gradients like skies. Corrections within roughly 0.5–2.0 stay clean on typical photos.