Your files stay on your device

Pixel-art upscaler

Make pixel art and sprites 2, 3, or 4 times bigger with sharp edges.

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Supports: JPG, JPEG, PNG, WEBP, AVIF, GIF, BMP, TIFF, JXL, QOI
How it worksEvery file is decoded locally, transformed ( HQX 2× pixel-art scale ), and re-encoded as PNG , output signature and dimensions are verified before a row counts as done. Animated inputs keep their first frame only (flagged on the row). HQX reads edges in YUV space and interpolates only inside a shape, so sprites stay sharp where a smoothing resampler would blur them. Sources up to 4096 px per side and 4,000,000 pixels. Larger art is out of this algorithm's league. Output is PNG with dimensions verified: no quality knob, nothing recompressed twice.Factor2 ×3 ×4 ×TransformDownload all (0)Clear queuePaste, drop, or type to begin. Everything stays on this device.

More image tools

- Resize images (/images/resize)
- Convert images (/images/convert)
All image tools (/images)

Canonical HTML: https://nutter.tools/images/hqx/
Markdown version: https://nutter.tools/images/hqx/index.md
Plain-text version: https://nutter.tools/images/hqx/index.txt
Agent index: https://nutter.tools/llms.txt