Adjust an Image
Lift a dark photo, cool a warm one, or sharpen what the camera softened.
- Add
- Adjust
- Make
- Keep
How to use this tool
- Add your files — drag them onto the page or choose them. They stay on your device.
- Lift or darken the picture with Brightness, then add or remove Contrast until it stops looking flat.
- Use Saturation for colour strength and Warmth for colour temperature; the two Advanced sliders handle sharpness and fine warmth.
- Press “Adjust images” and download the results, individually or as one ZIP.
About this tool
Lift a dark photo, cool a warm one, or sharpen what the camera softened. Free and unlimited, and nothing is uploaded: it all runs in your own browser. It runs entirely in your own browser — your file is never uploaded to a server, and the result downloads straight from your device, free, with no account and no watermark.
Privacy & limitations
The adjustments are arithmetic on the pixels and lose nothing themselves, but saving into a lossy format afterwards re-encodes — keep Save as on the original format when that matters. There is no histogram or eyedropper: judge by eye on the live preview.
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Frequently asked questions
Does adjusting lose quality?
The adjustment itself is arithmetic on the pixels and loses nothing. What costs a little is re-saving into a lossy format afterwards, which is why keeping the original format is the default and the quality is set high.
What does warmth actually change?
It shifts the picture towards orange or blue, which is what "warmer" and "cooler" mean in every photo app. It is an approximation rather than a true colour-temperature conversion, but it is the same approximation your phone uses and it reads the same.
Why does sharpening look strange at high values?
Sharpening does not add detail, it exaggerates the edges that are already there. Past a point that shows as bright halos along contrast boundaries. Twenty to forty per cent suits most photographs; the top of the range is there for images that need rescuing.
Can I adjust a whole folder at once?
Yes. Add as many images as you like and the same settings are applied to each.