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WebP vs JPEG: Which Image Format Should You Use?

WebP is 25–35% smaller than JPEG at the same quality and works in 97%+ of browsers — but JPEG still wins for email, print, and legacy software.

October 17, 2026 · 5 min read · Shayan

Short answer: for images on the web, use WebP — it is 25–35% smaller than JPEG at the same visual quality, supports transparency and animation, and works in 97%+ of browsers. Keep JPEG for email attachments, print, and old software that only speaks JPEG.

Why WebP wins on the web

WebP was built for the web; JPEG was built in 1992 for maximum compatibility. At the same visual quality, a WebP photo runs 25–35% smaller than the JPEG, which means faster page loads and less bandwidth. WebP also does two things JPEG simply cannot: transparency (an alpha channel, like PNG) and animation (as a lighter GIF replacement). Browser support is no longer the catch it once was — every current browser has supported WebP for years, covering over 97% of users.

When JPEG still wins

Compatibility is JPEG's superpower. Email clients, printers, and plenty of desktop software either don't render WebP or handle it badly. If the image has to open correctly anywhere — an email attachment, a print shop, a client's decade-old CMS — JPEG is the safe choice. JPEG is also the better archival format: keep your originals as JPEG or PNG, and treat WebP as the delivery format you generate from them.

Side by side

  • File size: WebP is 25–35% smaller than JPEG at the same visual quality.
  • Transparency: WebP yes (alpha channel); JPEG no.
  • Animation: WebP yes; JPEG no.
  • Browser support: WebP covers 97%+ of users; JPEG effectively 100%.
  • Email and print: JPEG — WebP support in email clients is unreliable.
  • Legacy software: JPEG — old editors and viewers may not open WebP at all.

The rule of thumb

Serve WebP on your website, keep JPEG as the fallback. The <picture> element makes this automatic — browsers that understand WebP get it, and everything else silently gets the JPEG:

<picture>
  <source srcset="photo.webp" type="image/webp">
  <img src="photo.jpg" alt="A photo" width="1200" height="800">
</picture>

The traps

  • Converting JPEG to WebP and deleting the original: WebP is a delivery format. Keep the JPEG or PNG original — you can't get quality back out of a converted file.
  • Using WebP in email: most email clients won't display it. Attach the JPEG.
  • Assuming smaller means worse: at the same quality setting, WebP's smaller file is the same picture. Compare at matched quality, not matched file size.
  • Forgetting transparency needs: if your image needs an alpha channel, JPEG was never an option — that's WebP or PNG territory.

Try it

Convert your images with the Image & SVG Converter — drop in a JPEG, get a WebP out, entirely in your browser with nothing uploaded.

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