JPG to WebP Converter

Convert JPGs to WebP for faster pages and smaller files — quality slider, bulk conversion, zero uploads.

Drop JPG files here

or — multiple files welcome. Nothing is uploaded; conversion happens on your device.

Files are processed entirely in your browser — never uploaded, never stored. Large photos convert in about a second each; the first HEIC file loads a small decoder module.

Runs fully in your browser — images are never uploaded or stored.

Frequently asked questions

How much smaller is WebP than JPG?

Typically 25–35% smaller at equivalent visual quality. On an image-heavy page that compounds into meaningfully faster loads — one of the cheapest performance wins available.

Is WebP supported everywhere?

All modern browsers, WordPress, Shopify, and every major CDN support it. The stragglers are older desktop software and some email clients — keep JPGs for email.

Are my images uploaded to a server?

No. Conversion runs entirely in your browser using its built-in image engine — files never leave your device, which also makes it faster than upload-based converters and safe for private photos.

Embed this calculator

Free to embed on your site. The attribution link back to this page is required — please keep it visible. 

<iframe
  src="https://stopbyte.com/embed/jpg-to-webp"
  title="JPG to WebP Converter by StopByte"
  width="100%" height="640" style="border:1px solid #d9dde3;border-radius:12px"
  allow="clipboard-write" loading="lazy"></iframe>
<p>Calculator by <a href="https://stopbyte.com/tools/jpg-to-webp">StopByte JPG to WebP Converter</a></p>