Pixel-Perfect Resizer
Upscale and resize pixel art with zero blur. True nearest-neighbor scaling keeps every edge crisp and every color flat — integer upscale, exact width/height, or downscale to a small grid. It's free and runs entirely in your browser; nothing uploads.
Showing a sample sprite upscaled ×4 with nearest-neighbor. Drop your own image to resize it — every pixel stays sharp, no blur.
How to use the Pixel-Perfect Resizer
- Drop an image onto the upload zone or click to browse. A crisp sample sprite is loaded so you can see the result immediately.
- Pick a mode: Upscale for clean integer scaling, Exact size to hit a specific width and height, or Downscale to shrink hi-res art to a small pixel grid.
- For upscaling, choose a factor —
×2,×4,×8, up to×16. The preview updates live and stays perfectly blocky. - For exact resizing, type a width and height (keep Lock aspect ratio on to avoid distortion). Sizes are capped at 4096 px per side.
- Click Download PNG to save the result at full output resolution — the filename records the scale or size you used.
Why nearest-neighbor matters
When you resize a sprite in a typical photo editor, it applies bilinear or bicubic interpolation that averages neighboring pixels together. That smoothing is great for photographs but ruins pixel art: the hard edges soften into a muddy blur. This tool does the opposite. It sets imageSmoothingEnabled = false before every draw and uses nearest-neighbor resampling, so each source pixel becomes a perfect block of identical pixels. The output is exactly what you drew — just bigger or smaller.
For the sharpest results, prefer integer scaling (×2, ×3, ×4) whenever possible so every original pixel maps to a uniform square. Non-integer factors still work with nearest-neighbor, but some rows or columns may end up one pixel wider than others. Need to prep a photo for the palette converter? Use the downscale mode first to collapse it onto a small grid, then quantize the colors.
Why does my pixel art get blurry when I resize it elsewhere?
Most editors and browsers default to bilinear or bicubic interpolation, which blends neighboring pixels to smooth the image. That smoothing is exactly what destroys crisp pixel-art edges. This tool disables smoothing and uses nearest-neighbor scaling, so every source pixel becomes a clean block with no blur.
What is nearest-neighbor scaling?
Nearest-neighbor copies the color of the closest source pixel instead of averaging several pixels together. It keeps hard edges and flat colors perfectly intact, which is why it's the correct method for upscaling sprites, tiles, and icons.
Should I use integer scaling or an exact width and height?
Use integer scaling (×2, ×3, ×4…) whenever you can — every original pixel maps to a perfect square and the image stays uniform. Exact width and height is useful when a platform demands a specific size, but non-integer factors can leave some pixels a row wider than others.
Are my images uploaded to a server?
No. Everything runs locally in your browser with the Canvas API. Your image never leaves your device and nothing is uploaded, stored, or tracked.