To convert PNG to JPEG, run npx optimo image.png --format jpeg. JPEG is often far smaller for photographs and complex gradients. Optimo handles format conversion and optimization in a single step.

Command

Convert a file by targeting the output format:

npx optimo image.png --format jpeg

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

Why convert?

• JPEG is often far smaller for photographs and complex gradients.
• Useful when transparency is not needed.

Format notes

PNG
Lossless image format with sharp edges and great support for transparency.

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

Not sure which to use?

If you're choosing a delivery format, here's a quick comparison.