Saturation

Saturation controls how intense or muted the colors in a photo look, independent of how bright or dark it is. Phone cameras and older compact cameras often shoot a little flat by default, especially in RAW-adjacent or "natural" color profiles, so bumping saturation slightly is one of the most common quick edits people make before posting a photo. Pushed the other way, dialing saturation down mutes colors toward gray without touching brightness or contrast — useful for a moodier, desaturated look, or as a first step toward a fully black-and-white conversion at 0%.

The slider runs from 0% (fully grayscale — every pixel's color removed, only its brightness remains) through 100% (the original, untouched colors) up to 200% (heavily oversaturated, where skin tones and skies tend to look artificial fast). This uses the browser's native canvas saturate filter, which adjusts color intensity uniformly across the whole image rather than targeting specific colors — so if only, say, the reds in a photo are oversaturated, this will affect every other color too as you correct it, not just red. For that kind of targeted color work you'd need a proper editor with per-channel controls; this is the fast, whole-image version.

Processing happens entirely client-side using the Canvas API — the photo is never uploaded, and nothing about it is sent anywhere. To combine a saturation adjustment with brightness, contrast, hue, or sharpness in one pass, the Image Adjustor puts all five controls on the same image at once.