Why convert to WebP
A JPG can often be replaced by a WebP that looks the same and is noticeably lighter, commonly 25–35% smaller. If you run a website, that saving applies to every image on every page view: less data to download, faster pages and a lower bandwidth bill. It is one of the cheapest speed improvements available because it requires no redesign, only a change of file format. WebP is supported by all current browsers, including Chrome, Firefox, Safari and Edge.
How to convert
- Drop your JPG on this page. The work happens in your browser, so the file is not uploaded.
- The image is saved as a WebP.
- Download it and use it on your site. To shrink further, set a target size; the tool then finds the highest quality that fits.
When WebP is the right choice, and when it is not
| Where the image will be used | WebP? | Notes |
|---|---|---|
| Your own website or blog | Yes | Faster pages with no visible change |
| Online shop or product pages | Yes | Many platforms convert on upload; check before assuming |
| An upload form for a portal or agency | Usually no | Many forms accept only JPG or PNG |
| Email attachments and documents | Usually no | JPG opens in more places |
| Printing, or sending to a print service | No | Stay with JPG or a lossless format |
Do it once, from the original
Both JPG and lossy WebP discard detail, so converting a JPG that has already been compressed hard will not hide the damage and can add to it. When you can, start from the best original you have and make the WebP from that. If you are replacing a whole set of images on a website, keep the JPGs as a fallback until you have checked every page.
Pair it with the right dimensions
The format is only part of the job. An image that is far wider than the space it is shown in wastes bytes in any format. Size the image to its slot first, then convert. The guide on making images load faster on your website explains the order, and the one on JPG vs PNG vs WebP the trade-offs. Going the other way? Use WebP to JPG.