Images & photos
Image brightness, contrast and gamma
Adjust a photo with a live preview and an exact exported PNG.
A clear answer. Here’s how.
Applies saturation around weighted RGB luma, multiplies brightness, applies contrast around midpoint 0.5, clips to 0–1 and raises to power 1/gamma. Uses display RGB code values rather than a colour-managed linear-light model. Alpha is retained. Controls default to the identity transform. Supports PNG/JPEG/WebP up to 10 MB and 4 million decoded pixels per file. Browser decoding and single-frame PNG re-encoding remove source metadata/colour profiles; no files leave this device.