JPG vs WebP: Which Format Is Better for Websites?

1.JPG vs WebP at a glance

• JPG: lossy photographic compression, universal historical compatibility, no transparency.
• WebP: lossy or lossless compression, alpha transparency, animation, and broad modern-browser support.
• Both formats can be appropriate for photographs; neither is ideal for every graphic or archival workflow.

2.File size and visual quality

Google’s WebP documentation reports that lossy WebP images are typically 25–34% smaller than comparable JPEG images at equivalent structural similarity. Real results vary with the image, encoder, and quality setting, so compare your own outputs rather than assuming a fixed saving.

Do not automatically export a low-quality source at a higher target quality. Re-encoding cannot restore missing detail and can sometimes create a larger file without a visible benefit.

3.Compatibility and fallback strategy

Current Chrome, Edge, Firefox, Safari, and Opera versions support WebP. JPG still has deeper historical support across old software, email clients, publishing systems, and offline applications.

For a website that must support an older environment, use the HTML picture element to offer WebP first and retain JPG as the fallback. This keeps modern delivery efficient without breaking the baseline image.

4.A practical recommendation

• Use WebP for new website photographs when your supported browsers accept it.
• Keep a high-quality source or JPG master instead of repeatedly re-encoding the same WebP.
• Use JPG when a third-party system requires it or historical compatibility is the priority.
• Test quality and file size on representative images before converting an entire library.