Image Contrast Adjuster
Give flat, hazy or faded pictures depth again. Raise or lower contrast, stretch the tonal range with one click, and add clarity to bring out texture, all with a live preview.
- Files stay on your device
- No sign-up
- Free to use
Contrast
Contrast spreads tones apart across the whole image. Clarity adds contrast locally, around shapes and textures, for more depth without crushing shadows.
Output
How to use Image Contrast Adjuster
- Drop the photos you want to improve onto the upload area.
- Select Auto contrast to stretch the tones to the full range, then adjust Contrast and Clarity to taste.
- Hold the compare button to see the original, and reset if you want to start again.
- Select Apply contrast and download the results.
Image Contrast Adjuster features
Global contrast
Push light and dark tones apart for a punchier look, or pull them together for a soft, matte style.
Auto contrast
Maps the darkest and brightest 0.5% of pixels to black and white, instantly fixing washed-out images.
Clarity
Adds local contrast around shapes and textures, revealing detail in clouds, buildings and fabric without harsh shadows.
Faded photo repair
Old prints and scans often lose their blacks; auto contrast restores them.
Batch processing
Apply the same settings to a series of images.
Runs locally
All processing happens on your device.
When to use Image Contrast Adjuster
- Restoring depth to photos taken through haze, fog or a window.
- Reviving scans of old, faded prints.
- Making charts, diagrams and whiteboard photos easier to read.
- Creating a soft, low-contrast matte look for lifestyle images.
- Adding drama to landscape and architecture shots.
Image Contrast Adjuster FAQ
What does contrast actually change?
Contrast is the difference between light and dark areas. Increasing it makes darks darker and lights lighter around a middle grey; decreasing it moves everything towards that grey, producing a softer, flatter image.
What is the difference between Contrast and Clarity?
Contrast works on tones across the whole image regardless of position. Clarity looks at neighbourhoods: it increases the difference between a region and its surroundings, which enhances texture and edges while leaving overall brightness largely unchanged.
What does Auto contrast do?
It finds the darkest and brightest tones actually present in the picture, ignoring a tiny fraction of extreme pixels, and stretches that range to cover pure black to pure white. Photos with a full range already will barely change.
Can too much contrast damage a photo?
High contrast loses detail in deep shadows and bright highlights, and can make skin look harsh. If shadows turn into solid black areas, reduce the contrast or use Clarity instead.
Does it work on black-and-white images?
Yes. Contrast and clarity are especially effective on monochrome photos, where tone is the only thing giving the picture depth.
Why photos look flat and how contrast fixes them
A photo looks flat when its tones occupy only part of the available range. Haze, fog, glare on a lens, light bouncing inside a window or the slow fading of an old print all add a veil of grey that lifts the shadows and dims the highlights. The histogram of such an image is narrow, with empty space at both ends. Stretching it, so the darkest real tone becomes black and the brightest becomes white, is the classic correction known as levels or auto contrast.
The contrast slider here pivots around middle grey: tones above it move up and tones below it move down. This is equivalent to steepening the middle of a tone curve, the main tool photographers use for contrast. Reducing contrast does the opposite, flattening the curve, which is the basis of the popular faded or matte look used in lifestyle and fashion imagery.
Clarity is a more recent idea. Rather than changing tones globally, it boosts differences between each area and its surroundings, measured over a fairly large radius. Technically it is an unsharp mask with a wide radius and low strength. The effect emphasises structure, such as the texture of clouds, stone or wood, while a gentle setting avoids the halos that strong local contrast can produce.
Contrast and brightness are linked: increasing contrast makes a light image look lighter and a dark image darker. If an image is both dark and flat, fix the brightness first with the Brightness Adjuster, then return here to add depth.