any→jxl

Quality

Higher = better quality, larger file. 100 is lossless; 75-90 is a good range for photos.

Encoder Effort

Higher effort usually makes smaller files and takes longer.

JPEG XL Mode

Lossy is best for photos. Lossless preserves decoded pixels and is larger.

Decode Speed

0 gives best density and quality. Higher values favor faster decoding.

JPEG Inputs

Lossless transcode skips re-encoding and stores a reversible JPEG inside JXL.

Chroma Subsampling

Reduce color detail to shrink files. Eyes are less sensitive to color than brightness.

Color Transform

Auto lets libjxl choose. XYB is usually best for lossy photos; YCbCr can be useful for compatibility testing.

Forces JPEG XL's perceptual XYB transform for lossy color images. The output is still a standard JXL.

Progressive Mode

Progressive shows a quick preview that sharpens as it loads.

Adaptive Quantization

Spends more data on detailed areas, less on smooth areas. Recommended.

Transparency

JPEG XL supports transparency. Alpha is preserved by default.

Grayscale

Metadata

Turning these off saves space and improves privacy.

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Rasterization

DPI for converting PDFs, TIFFs, and SVGs to pixels.

PDF & TIFF (multi-page)

Output mode:

SVG Rasterization