How to use the WebP to JPG converter
- Drop in one WebP or a batch of them.
- Leave quality at 90 for a copy that looks the same, or bring it down to about 75 for a lighter file.
- For pictures with transparent parts, choose white, black or light grey under More settings.
- Convert and download the JPGs one by one or zipped.
The JPG will be a bit heavier
WebP packs a photo into roughly a quarter to a third fewer bytes than JPG at a similar look, so the converted file is normally somewhat larger than the source. Quality around 75 brings the size close to the original WebP with little visible difference.
The picture has already been compressed once. Going very low on quality adds a second round of artefacts on top of the first, so stay at 70 or higher for anything that will be printed or shown full screen.
Filling transparent areas
JPG cannot hold see-through pixels. Transparent and partly transparent areas are mixed with the fill colour you pick, white unless you change it. Black suits images headed for a dark video background; light grey suits neutral slides.
Need the transparency preserved for an overlay? Convert to PNG instead.
Many pictures at once
Stills grabbed for a storyboard or a set of product pictures from a supplier site can all go in together. Every row shows the original size next to the new one, and when the queue finishes a single ZIP holds the lot.
There is no account and no daily allowance. Your own device does the work, so the only practical ceiling is how much memory the browser can use.
Questions
Why does my browser save pictures as WebP?
The site sent the image as WebP and the browser stored it unchanged. Converting produces a JPG that every program opens.
Can I resize at the same time?
Yes. More settings offers a percentage, a fixed width or height, or a bounding box to fit within.
Is the output progressive?
Yes. MozJPEG writes progressive files with optimised Huffman coding.