Turn normal photos and illustrations into retro 8-bit / 16-bit pixel art. Choose from authentic console palettes like Game Boy, PICO-8, NES, Cyberpunk, or Monochrome, and export as PNG or pure CSS box-shadow art.
Rendered with nearest-neighbor interpolation. Perfect for indie game sprites, avatars, and retro UI design.
Engineering principles behind retro hardware rasterization and palette reduction.
Pixel art is characterized by low spatial resolution and restricted color palettes, simulating the hardware constraints of early computing architectures (such as the 8-bit Game Boy DMG-01 or 16-color PICO-8 fantasy console). Converting continuous-tone photography into authentic pixel art involves two distinct mathematical processes: spatial grid downsampling and color distance quantization.
Standard image resizing uses bilinear or bicubic interpolation, which blends neighboring pixel values to smooth edges. Pixel art requires nearest-neighbor sampling: the source bitmap is divided into uniform grid blocks (e.g. 8x8 px), and the center sample color is mapped directly without intermediate blur.
Modern 24-bit RGB images contain up to 16.7 million distinct colors. To reduce this continuous spectrum to a target palette (such as PICO-8 16 colors), each input pixel color (R, G, B) is evaluated against all palette colors (PR, PG, PB) using the 3D Euclidean distance formula: D = sqrt((R - PR)^2 + (G - PG)^2 + (B - PB)^2). The palette entry with minimum geometric distance is selected.
Pixel art can be represented in pure CSS using a single 1x1 pixel div with a chained box-shadow property. Each shadow declaration specifies horizontal offset, vertical offset, blur (0px), and hex color: box-shadow: 1px 0px #0f380f, 2px 0px #306230... This eliminates image HTTP requests entirely.
| Parameter | Standard / Value | Engineering Scope |
|---|---|---|
| Sampling Algorithm | Nearest-Neighbor Point Filter | Preserves sharp pixel boundaries |
| Color Space | sRGB 3D Coordinate Distance | Euclidean minimum vector distance |
| Supported Palettes | Game Boy (4-color), PICO-8 (16), B&W | Exact historical hardware color specifications |
| CSS Rendering | Single-Element Multi-Shadow | Zero-image CSS vector representation |
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