JPG vs WebP: Which Is Better?
Updated August 27, 2026
For photos on the web, WebP is simply the better JPG — same picture, quarter to a third fewer bytes. Off the web, the answer flips. This guide draws the line.
The one-sentence answer
WebP for anything served on a website; JPG for everything that leaves the browser — email, documents, print, uploads to systems you don't control.
The size difference, quantified
Both formats are lossy, but WebP's encoder is a generation newer: at equal visual quality, photos come out 25-35% smaller. One photo, minor. A gallery, a product catalog, a page with a dozen images — the savings compound into visibly faster loads and better Core Web Vitals scores.
Side by side
| JPG | WebP | |
|---|---|---|
| Photo size at equal quality | Baseline | 25-35% smaller |
| Transparency | No | Yes |
| Browser support | Universal | All modern browsers (since 2020) |
| Email, Office, print, kiosks | Reliable | Frequently unsupported |
| Upload forms & portals | Accepted everywhere | Sometimes rejected |
| Best role | Interchange & delivery outside the web | Web delivery |
The compatibility catch
Browsers all read WebP; the rest of the world is slower. Printers and photo kiosks, government and job portals, older Office versions, and plenty of email clients still expect JPG. That's why images saved from websites — which arrive as WebP — so often need converting back to JPG before they'll upload anywhere.
Practical workflow
Keep originals as JPG (or RAW), convert delivery copies with JPG to WebP for your site, and convert web-saved images back with WebP to JPG when a form or app refuses them. Since both formats are lossy, avoid ping-ponging the same file repeatedly — each round trip costs a little quality.