Convert PNG to JPEG XL

A practical, local workflow for converting PNG to JPEG XL with optimo.

Last updated: 2026-03-18

To convert PNG to JPEG XL, run npx optimo image.png --format jxl. JPEG XL can preserve high fidelity while shrinking some PNGs. Optimo handles format conversion and optimization in a single step.

Command

Convert a file by targeting the output format:

npx optimo image.png --format jxl

Tip: add --dry-run to preview changes.

Why convert?

  • JPEG XL can preserve high fidelity while shrinking some PNGs.
  • Useful for modern workflows or archival masters.

Format notes

PNG
Lossless image format with sharp edges and great support for transparency.
Optimize PNGCompress PNGResize PNGPNG guide
JPEG XL
Next-gen image format designed for high quality and efficient compression.
Optimize JPEG XLCompress JPEG XLResize JPEG XLJPEG XL guide

More from PNG

PNG → WebPPNG → AVIFPNG → JPEGPNG → HEICPNG → GIF

More to JPEG XL

JPEG → JPEG XLWebP → JPEG XLAVIF → JPEG XLHEIC → JPEG XLGIF → JPEG XL

Frequently asked questions

How do I convert PNG to JPEG XL?
Run "npx optimo image.png --format jxl" in your terminal. Optimo handles the format conversion and applies optimization in a single step.
Why convert PNG to JPEG XL?
JPEG XL can preserve high fidelity while shrinking some PNGs. Useful for modern workflows or archival masters.
Does converting PNG to JPEG XL lose quality?
Optimo uses sensible defaults that balance file size and quality. For lossless conversion (where possible), omit the --lossy flag. Add --dry-run to preview the result before committing.