White balance correction
Click, in your photo's preview, on an area that should be neutral gray or white: the tool automatically calculates the red, green, and blue corrections to apply to neutralize a color cast caused by unsuitable lighting.
How it works
The tool assumes that the pixel you clicked should, in theory, have identical red, green, and blue values (a neutral color). It computes the average of these three values as the target, then determines a correction factor (gain) per channel to bring that pixel back to neutrality, and applies that same gain to every pixel in the image.
What kind of area should I choose for a good result?
Choose an area that you know is white, gray, or black in reality: a white wall, a sheet of paper, neutral gray clothing, or a shadow on a light surface. Avoid very dark areas (near pure black) or very bright ones (overexposed at 255), where the gain calculation becomes unreliable.
Why does the correction affect the whole image and not just the clicked area?
The color cast caused by lighting (orange tungsten, greenish fluorescent, bluish shadow) usually affects the whole photo uniformly. By applying the same correction factor to all pixels, the tool neutralizes that cast across the entire image, not just at the reference point.
100% local processing: the gain calculation and application happen entirely in your browser — your photo is never sent to a server.