What is JPG to WebP conversion?
This tool converts JPG images into the WebP format, entirely in your browser with no upload. JPG (JPEG) is a lossy format without transparency that compresses photographs to a small size. It is the most universal format for camera and web photos, at the cost of losing a little quality each time it is saved. WebP is a modern web format from Google that supports both transparency and higher compression, typically 25–35% smaller than JPG or PNG. It is great for speeding up websites, though a few older programs may not support it.
How to use it
- Select or drop in your JPG image.
- The tool converts it to WebP locally, instantly.
- Click Download to save the WebP file.
When should you convert JPG to WebP?
JPG is what most cameras and phones produce, so you often have JPGs you want in another format for editing or the web.
Convert JPG to WebP when you want faster-loading web pages: WebP is typically 25–35% smaller than JPG while keeping both quality and transparency. It is perfect for website images; if your audience uses older software without WebP support, use JPG or PNG instead.
JPG vs WebP: key differences
| Property | JPG | WebP |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | No | Yes |
| Best for | Photographs, camera images, web photos | Fast-loading website images |
When should you convert JPG to WebP?
Convert JPG to WebP when a photo-heavy page feels slow to load. At a similar visual quality, WebP files are typically 25–35% smaller than JPG, so once you have dozens of images on a page the savings add up and your Core Web Vitals improve. The catch is support: very old browsers, and some older CMS themes or plugins, don't recognise WebP and will show a broken image instead. If your site serves a broad, mixed audience, keep the original JPG as a fallback so devices without WebP support can still see the image.
Why does the photo save only 9% while the screenshot saves 84%?
Because you are not comparing an old format with a new one — you are comparing what JPEG is good at with what it is bad at. The photo goes 330.2 KB → 301.9 KB (-9%): the discrete cosine transform inside JPEG was designed for continuous tone and has had thirty years to approach its limit, so WebP can only squeeze out a little more at the same quality. But the screenshot goes 45.2 KB → 7.3 KB (-84%) and the illustration 25.6 KB → 10.6 KB (-59%) — those are exactly what JPEG handles worst (large flat areas, hard edges), and WebP has tools for them that JPEG lacks. So "how much will WebP save" is not a question about formats; it is a question about how unlike a photograph your image is. The files on your site worth converting first are usually the interface graphics you assumed were already small.