Invert Image Colors

Inverting an image turns every colour into its opposite: black becomes white, blue becomes orange, like a film negative. It is handy for reading scanned negatives, making white-on-black versions of logos and diagrams, and checking designs. The brightness-only mode flips light and dark but keeps hues, which makes a passable dark-mode version of a screenshot or document. Transparency is kept, and files never leave your device.

How to use this tool

1. Choose one or more images.
2. Pick what to invert: all colours, brightness only, or a single red, green or blue channel.
3. Keep the original format or choose PNG, JPG or WebP.
4. Download the inverted images, or all of them as a ZIP.

Formula

Negative: R′ = 255 − R, G′ = 255 − G, B′ = 255 − B. Brightness only: each channel + (255 − max − min).

The brightness-only mode sets HSL lightness L to 1 − L. Because lightness is (max + min) ÷ 2 and hue and saturation depend only on the differences between channels, shifting all three channels by 255 − (max + min) does exactly that. White and black swap, while a red stays red and a blue stays blue. Alpha (transparency) is never changed.

Example

The blue #2563EB (37, 99, 235) becomes (218, 156, 20), an orange #DA9C14, as a negative. With brightness only, max + min = 235 + 37 = 272, so every channel moves by 255 − 272 = −17, giving (20, 82, 218): still blue, slightly darker. White text (255, 255, 255) moves by −255 and becomes black.