JPG to WebP Converter
Cut image weight for your site. Converted locally, nothing uploaded.
Your files stay in this tab. There is no upload endpoint on this site.
Why sites move their images to WebP
WebP reaches roughly the same perceived quality as JPEG at 25–30% fewer bytes. On an image-heavy page that is often the single largest available performance win, and it feeds directly into Largest Contentful Paint — the Core Web Vital that measures how long the biggest element above the fold takes to render. Since LCP is a Google ranking signal, image format is one of the few SEO levers that is purely technical and entirely under your control.
Browser support stopped being a concern years ago: Chrome, Edge, Firefox, Safari and every current mobile browser render WebP. Safari has supported it since version 14 in 2020.
Choosing a quality value
WebP quality numbers are not interchangeable with JPEG quality numbers. WebP at 80 is broadly comparable to JPEG at 90. The default here is 82, which suits photographic content on a website. Push it to 90+ for hero images and product photography where detail matters; drop to 70 for thumbnails, avatars and anything displayed small.
Serve it safely with a fallback
Rather than replacing your JPEGs outright, serve both and let the browser choose:
<picture>
<source srcset="photo.webp" type="image/webp">
<img src="photo.jpg" alt="…" width="1200" height="800">
</picture>Modern browsers take the WebP; anything else falls back to the JPEG. Always include explicit
width and height so the browser can reserve space and avoid layout shift.
Common questions
Do my files get uploaded to a server?
No. Every tool on this site runs entirely in your browser using the Canvas and WebAssembly APIs. There is no upload endpoint in the page — you can confirm this yourself by opening your browser's Network tab while you convert a file. Nothing leaves the tab, which also means the tools keep working if you go offline after the page loads.
How much smaller will my images get?
Typically 25–35% at matched visual quality. The exact saving depends heavily on content — smooth gradients and skin tones compress best, fine texture and noise compress least.
Do all browsers support WebP?
Yes, every current browser does, including Safari since version 14 (2020). Only genuinely old browsers need the <picture> fallback shown above.
Is WebP or AVIF better?
AVIF compresses better still, roughly 20% smaller than WebP, but encoding is far slower and support is slightly narrower. WebP remains the pragmatic default for most sites.