What is WebP, and how does it compare with JPG?
WebP is an image format designed for the web. It can use lossy compression, similar to JPG, or lossless compression, and it supports transparency and animation. At comparable visual quality, a lossy WebP file is generally smaller than the equivalent JPG.
JPG is older and understood by practically everything: cameras, phones, office software, print shops. WebP is supported by current browsers, but you may still meet apps and upload forms that do not accept it. The two formats are best seen as complementary: JPG for maximum compatibility, WebP for pages where smaller images matter.
Why convert JPG photos to WebP?
The usual motivation is page weight. Images are often the heaviest part of a web page, and swapping JPG for WebP can cut that weight without an obvious change in how the pictures look. Smaller images help pages load sooner, especially on slow mobile connections.
It also helps with storage and sharing limits, such as image upload caps in a CMS or theme. If you run a blog, a shop or a portfolio and prepare images by hand before publishing, converting to WebP is a simple step to add.
If you need to send the photo to someone who might open it in older software, keep the JPG as well, or use WEBP to JPG later to go back.
How to convert JPG to WebP with this tool
- Drop a JPG onto the upload area or click to browse for one.
- Review the original preview, file name and size.
- Adjust the Quality slider (10% to 100%, default 92%). Lower values give smaller files.
- Click Convert to WEBP and compare the preview and the size change shown under it.
- Click Download. The file keeps its base name with a .webp extension.
Everything runs locally in your browser, so the photo is never uploaded. You can convert another image by choosing Start over.
Things to watch for
Quality is not a fixed scale across formats. A 90% JPG and a 90% WebP are not identical in appearance, so judge by eye using the preview rather than by the number.
Converting a JPG does not restore lost detail. The JPG was already compressed once, and converting it adds another round of lossy compression. If you still have the original camera file, you will get a cleaner WebP by converting from that.
Browser support for encoding. The tool relies on your browser's own WebP encoder. Current desktop and mobile browsers generally provide one, but if conversion fails, try another modern browser.
For batch-quality decisions on file size alone, the image compressor is also worth a look.