Game Boy Filter

Give an image or video the four green shades of a classic handheld screen, dithered so the detail survives.

The original Game Boy drew everything in four shades of green on a 160 by 144 pixel screen. This filter gives an image or video that palette: it snaps every color to the four greens and uses ordered dithering, the Bayer crosshatch of old consoles, so gradients survive as patterns instead of flat bands. It also covers the Game Boy Camera look, which used the same four shades.

Dot size sets the size of a dither dot, Spread how hard the pattern pushes colors, and Brightness and Contrast shift the tones before dithering. Swap the pattern to blue noise for an even grain, or change the palette to CGA, C64 or PICO-8.

Export the result as an image, or as a video or GIF if you started with a clip. Everything renders in your browser; your file never leaves your device.