JPG → WebP
Convert JPG to WebP
WebP files are meaningfully smaller than JPG at the same visible quality. If you are putting images on a website and page speed matters, this is the conversion that pays for itself.
Convert your files
How it works
What you actually gain
At the same apparent quality, WebP typically comes out 25–35% smaller than JPG. On a page carrying a dozen photographs that is a real difference to how fast it loads, and page speed is one of the few technical things that reliably affects both ranking and whether people stay.
The saving varies with the picture. Photographs with large areas of smooth gradient benefit most; images that are already heavily compressed benefit least. Convert one and compare before converting a thousand.
When not to bother
If the image is going to a person rather than a server — emailed, printed, handed to a client — leave it as JPG. Some desktop software and print shops still will not accept WebP, and the file size saving means nothing once the file has arrived. WebP is for the web, which is what it was built for.
Quality setting
The slider above controls the WebP encoder. Bear in mind the JPG you are starting from has already been compressed once, so a very high setting spends bytes preserving compression artefacts rather than detail. Around the default is usually the sensible place to sit.
Questions
How much smaller will the files be?
Usually 25–35% smaller at equivalent visible quality, though it varies a great deal with the image. Convert one file and compare it against the original before committing to a large batch.
Will every browser display WebP?
Every current major browser has supported it for years. Only very old browser versions do not, so keep a JPG fallback if you must support those.
Does converting again lose more quality?
Yes. The JPG was already lossy and WebP is lossy too, so this is a second pass. It is not visible at sensible settings, but converting back and forth repeatedly will degrade the image.
Can I convert a whole folder?
Yes. Drop in as many JPGs as you like and save the results together as a .zip.