Convert JPG to WebP
Make photos for your website smaller and faster by converting them to WebP. Batch convert in the browser with no upload.
Files never leave your deviceNeed more settings? Open the full Convert Image tool.
How to convert JPG to WebP
- Drop your JPG photos onto the box above. Add a whole folder’s worth at once if you like.
- Convert to is set to WebP with a quality of 80, a good balance for websites.
- Press Convert to WebP and watch the new sizes appear.
- Download the WebP files one by one or as a ZIP.
Faster pages with smaller images
Images are usually the heaviest part of a web page. WebP files are typically 25 to 35 percent smaller than JPGs that look the same, which means pages load faster, use less mobile data and score better in Google’s PageSpeed Insights and Core Web Vitals reports. Every current browser displays WebP, including Safari since version 14, so there is no compatibility cost for a modern site.
WebP is also a good fit for:
- online shop product photos, where dozens load on one page;
- blog and portfolio images;
- images for email newsletters sent to recipients using modern mail apps.
Choosing a quality
The default of 80 is a sensible starting point for photos on the web. Go up to 85 or 90 for large hero images or photos with fine detail such as hair, fabric or foliage. Go down to 70 for small thumbnails, where the difference is hard to see.
Start from the best original you have. Converting a JPG to WebP compresses the picture a second time, so starting from a camera original or a PNG gives a slightly cleaner result than starting from a JPG that was already heavily compressed. For images with transparency, use the image converter.
Want even smaller files? AVIF often beats WebP by another 20 percent; pick it in the image converter. To change the pixel size for the web first, use resize image.
Private and offline
The libwebp encoder runs inside your browser as WebAssembly, so your photos are converted on your own device and never uploaded. After the first visit the converter works without a connection.
Frequently asked questions
How much smaller is WebP than JPG?
At similar visual quality WebP files are usually 25 to 35 percent smaller. The exact saving depends on the photo; detailed, noisy images save less than smooth ones.
Can every browser show WebP?
Yes. Chrome, Edge, Firefox and Safari (since version 14) all display WebP, so it is safe for any modern website.
What quality setting is best for the web?
Quality 75 to 85 is the usual sweet spot. Below 70 you may see blur in fine textures such as hair and foliage.
Are my files uploaded anywhere? How can I check?
No. The JPG to WebP converter runs entirely in your browser using JavaScript and WebAssembly, so your files never leave your device. You can verify it: open your browser's DevTools (F12, or Cmd+Option+I on a Mac), switch to the Network tab, tick "Preserve log", clear the list and process a file. You will only see requests for this site's own static files, never one that carries your data. You can also turn on "Offline" in the Network tab (or disconnect from the internet) once the page has loaded, and the tool keeps working.
Does it work offline?
Yes. After your first visit a service worker saves the tool to your device, so it opens and works without a connection. Only advertising needs the internet; the processing never does.