CapsuleKit · free browser tools
Pixel Art Upscaler Online (Nearest-Neighbor)
Free pixel art upscaler online: resize sprites 2x, 3x, 4x or 8x with crisp nearest-neighbor scaling — no blur, no smoothing. Optional pixel grid. Download PNG. Runs offline in your browser.
FAQ
Does it blur my pixel art?
No. It uses pure nearest-neighbor scaling done pixel by pixel, so every pixel becomes a crisp s×s block with no smoothing or anti-aliasing.
Why integer scales only?
Integer scales (2x, 3x, 4x, 8x) keep every source pixel the same size. Fractional scales make some pixels bigger than others.
Are my images uploaded?
No. Everything runs locally in your browser, and it works offline once loaded.
What does Show grid do?
It darkens the edges of each source pixel (at 3x and up) so you can inspect sprites or make tutorial images. Turn it off for clean exports.
Where can I find matching game SFX for pixel art projects?
CapsuleKit is a set of free browser tools. For audio, Assetsmith publishes free and paid SFX packs on itch.io — start with the free VHS sampler or the Fantasy RPG SFX Bundle when you need UI, combat, and ambience cues.