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WebP vs JPG: File Size, Quality, and Browser Support

Published on March 3, 2026

WebP files are 25-34% smaller than JPGs at the same visual quality. If your images are going on a website, use WebP. If you need maximum compatibility (email attachments, print, older software), stick with JPG.

Compression

JPG uses DCT-based lossy compression, a method from 1992 that still works well. WebP uses a more modern approach based on VP8 video codec prediction, achieving better compression ratios. Google's own testing showed WebP lossy images are 25-34% smaller than equivalent quality JPGs. For a photo-heavy website serving thousands of images, that adds up to real bandwidth savings.

Lossy and Lossless

JPG is lossy only. Every save degrades quality slightly. WebP supports both lossy and lossless compression. WebP lossless is 26% smaller than PNG, making it a viable replacement for both JPG and PNG in a single format. This flexibility is one of its biggest advantages.

Transparency and Animation

JPG does not support transparency. Period. If you need a transparent background, you need PNG, WebP, or another format. WebP handles transparency natively with its alpha channel, even in lossy mode. WebP also supports animation, acting as a replacement for GIF with drastically smaller file sizes.

Browser Support

WebP is supported by Chrome, Firefox, Edge, Safari (14.1+), and Opera. That covers about 97% of web traffic globally. The holdouts are very old browsers and some specialized software. JPG is supported literally everywhere. If you are building an email template or generating images for legacy systems, JPG avoids any compatibility questions.

When to Use WebP

  • Website images where page speed matters
  • Web apps serving many images (e-commerce product photos, galleries)
  • Replacing both JPG and PNG with a single format
  • Animated images that would be too large as GIF

When to Use JPG

  • Email attachments and newsletters
  • Print workflows that expect standard formats
  • Social media uploads (most platforms accept JPG natively and re-encode anyway)
  • Compatibility with older systems and software

Converting Between Formats

To switch a JPG to WebP for your website, use our image to WebP converter. Going the other direction, our WebP to JPG converter handles the conversion in your browser.

For a step-by-step walkthrough, read how to convert WebP to JPG. For a broader format comparison, check out WebP vs PNG, PNG vs JPG, and our overview of the best image format for web.