Adjust Brightness, Contrast & Saturation
Three sliders, live preview, no upload. Fix dark photos, boost colors, or dial back the intensity. Everything runs in your browser.
Drag an image here, or click to browse
JPG, PNG, WebP supported
How to adjust your image (about five seconds)
Drag a slider, see the result, download. That is the whole process.
Drop your image
Drag any JPG, PNG or WebP onto the tool.
Adjust the sliders
Brightness, contrast and saturation all update the preview in real time.
Use Reset if you go too far
One click puts everything back to normal. Each slider also has its own reset.
Download
Saves as PNG at the original resolution.
The three sliders and what they actually do
Brightness controls the overall lightness of the image. Higher values make everything lighter, lower values make it darker. Think of it like adjusting the backlight on your monitor, except it changes the actual image data.
Contrast controls the difference between the darkest and lightest areas. Higher contrast makes darks darker and lights lighter. Lower contrast flattens everything toward the middle, giving a more muted look. Photos with haze or taken through glass often benefit from a small contrast boost.
Saturation controls how colorful the image looks. At 0% you get a grayscale image. At 100% the colors are unchanged. Above 100% the colors get more intense. Most photos from phone cameras already have boosted saturation, so going higher can look unnatural fast.
When you actually need this
Fixing underexposed phone photos is the most common one. You took a photo indoors and it came out too dark. A brightness boost of 20 to 30% plus a small contrast bump usually fixes it. No fancy editing software needed.
Preparing images for print is another use case. Monitors lie about brightness. What looks fine on screen often prints darker than expected. Bumping brightness to 110 to 115% before printing can compensate. Making screenshots look less washed out is a third common case. A slight contrast increase and saturation boost can make a faded screenshot look much sharper and more presentable.
Why 100% on every slider means no change
The scale is multiplicative. 100% means “the original value times 1.0” which changes nothing. 50% halves the value. 200% doubles it. This is a standard approach used by CSS filters and most image editors. It is intuitive once you know the baseline: 100% equals no change.