To convert JPEG to JPEG XL, run npx optimo photo.jpg --format jxl. JPEG XL can improve compression while keeping high visual quality. Optimo handles format conversion and optimization in a single step.

Command

Convert a file by targeting the output format:

npx optimo photo.jpg --format jxl

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

Why convert?

• JPEG XL can improve compression while keeping high visual quality.
• Useful when you want a high-quality master before creating web files.

Format notes

JPEG
The classic photo format: widely supported, good quality-to-size for photographs.

• Optimize JPEG
• Compress JPEG
• Resize JPEG
• JPEG guide

JPEG XL
Next-gen image format designed for high quality and efficient compression.

• Optimize JPEG XL
• Compress JPEG XL
• Resize JPEG XL
• JPEG XL guide