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HQX Pixel-Art Scaler: 2x, 3x, 4x

Scale sprites and pixel art 2×, 3×, or 4× with HQX edge detection. Shapes stay sharp where smoothing resamplers blur.

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Supports: JPG, JPEG, PNG, WEBP, AVIF, GIF, BMP, TIFF, JXL, QOI

Every 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).
Factor2 ×3 ×4 ×

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.
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Next door in Photos

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

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