Increase Image Contrast
Add punch to a flat, washed-out photo by increasing its contrast — or reduce contrast for a softer look. Live preview, auto levels, and everything processed on your device.
Privacy-first: every image is processed locally in your browser. Nothing is uploaded, stored or transmitted to any server.
What contrast is, and when raising it helps
Contrast is the distance between the dark and light tones in an image. Increasing it pushes shadows down and highlights up, so edges separate and the picture reads as crisper — even though no new detail has been added. It is the standard fix for images that look flat and gray: photos shot through haze, in overcast light, or on an overexposed screen, along with scanned documents and screenshots that came out washed out.
There is a limit worth respecting. Push contrast too far and shadows clip to pure black and highlights blow out to pure white, and the detail in those areas is gone for good in the exported file. The live preview and the hold-to-compare button make it easy to find the point just before that happens.
Auto levels: usually the better first move
Before reaching for the contrast slider, try Auto levels. Instead of applying a fixed curve, it measures your photo's own histogram, finds where each color channel actually starts and stops, and stretches that range to fill the full scale. A photo whose darkest pixel was a murky gray gets a real black point back — which is often the entire problem — and unlike a blunt contrast boost it fixes color casts at the same time.
The two work well together: run Auto levels first, then add a little contrast on top for taste.
Lower contrast, too
The slider runs negative as well. Reducing contrast pulls the tones toward mid-gray for a soft, faded, film-like feel — the basis of the Fade look — and it is genuinely useful when an image will sit behind text as a background and needs to stop competing with it. Whichever direction you go, the adjustment happens locally and exports at full resolution as JPG, PNG or WebP.
Frequently asked questions
- Is my image uploaded to adjust it?
- No. Every adjustment is computed on a canvas inside your browser, so the photo never leaves your device and no server ever sees it.
- How do I make an image black and white?
- Set the “Black & white” slider to 100% — or click the B&W look, which also adds a little contrast so the result does not look flat. Noir goes further with a much harder contrast curve.
- What does inverting the colors do?
- It replaces every color with its opposite, which turns a photo into a negative: white becomes black, blue becomes orange. It is how you read a scanned film negative, and a quick way to flip a screenshot to a dark version.
- What is the difference between brightness and contrast?
- Brightness moves every tone up or down together, so the whole picture gets lighter or darker. Contrast pushes light and dark tones apart, which adds punch — or, in the negative direction, flattens the image into a soft, hazy look.
- What does Auto levels do?
- It measures each color channel of your photo, ignores the extreme 0.4% at each end, and stretches what is left across the full range. Washed-out, hazy or underexposed shots usually snap back to life with a single click.
- Can I adjust many photos at once?
- Yes. Drop in as many images as you like — the settings apply to all of them, and you can download the results individually or together as a single ZIP.
- Will adjusting reduce quality?
- The adjustment itself works at full resolution with no downscaling. Only the re-encode matters: choose PNG for a lossless result, or keep JPG/WebP at a high quality setting.