File size at equal quality
WebP's main advantage is efficiency. In typical tests, a WebP photo at the same visual quality as a JPG is 25–35% smaller. On a page with ten images, that difference adds up to faster loads and lower bandwidth bills.
JPG uses older compression technology. It works well but cannot match WebP's modern algorithms. The gap is widest on photographic content with smooth gradients — skies, skin tones, and blurred backgrounds.
PNG and GIF are not direct competitors for photos here; they solve different problems. This comparison focuses on the two formats most sites use for photographic content.
Quality and artifacts
Both WebP and JPG are lossy when optimized for web use. At high quality settings, most viewers cannot tell them apart on a laptop or phone screen.
JPG sometimes shows blocky artifacts in high-contrast edges at low quality settings. WebP handles many of those cases more gracefully, which means you can use a smaller file before artifacts appear.
Re-saving an already compressed JPG causes generation loss — quality drops each time. Convert from the original master file when switching to WebP, not from a heavily compressed JPG copy.
Transparency and animation
JPG does not support transparency. Any logo or product shot on a transparent background needs PNG or WebP. That alone pushes many sites toward WebP for mixed content.
WebP also supports animation like GIF but with better compression. If you still use GIFs for simple animations, WebP is a worthwhile upgrade.
For flat logos and icons, SVG often beats both raster formats. Use WebP or PNG when raster artwork is required.
Browser and CMS support in 2026
All major browsers — Chrome, Firefox, Safari, Edge — display WebP natively. Unless your analytics show significant traffic from very old embedded browsers, WebP alone is safe for public websites.
Some legacy CMS workflows and email clients still prefer JPG. Keep JPG exports for those channels while serving WebP on the site via picture elements or CDN conversion.
Social platforms accept both formats but may re-compress uploads anyway. Starting with a reasonably optimized WebP or JPG still gives you more control over the final result.
Convert JPG to WebP with Irreva
You do not need command-line tools or paid plugins to switch formats. Upload your JPG images to the Irreva JPG to WebP converter, download WebP files, and update your site.
Conversion runs in your browser — private, free, and instant. For most websites in 2026, WebP is the better default for photos; keep JPG copies only where a specific platform requires them.