How to use the JPG to WebP converter
- Add the JPG thumbnails or photos meant for your site.
- Leave quality at 80, or tick Lossless only for graphics that must stay pixel-exact.
- Optionally set a width under More settings, then convert and download the WebP files or a ZIP.
Poster frames and gallery images
A video page often carries a large poster image plus a row of thumbnails, and those pictures can outweigh the rest of the page. As lossy WebP at quality 80, a typical photo comes out 25–35% lighter than the JPG, and the gap widens when the JPG was exported at a high setting.
Matching the display size matters just as much. A still exported at 3840 pixels and shown in a 1280-pixel player area is mostly wasted bytes; set the width before converting.
When to keep the JPG
Current Chrome, Edge, Firefox and Safari all show WebP. Email newsletters, some social networks and certain upload forms are less reliable, so hold on to the JPG for those destinations.
Lossless WebP is meant for flat graphics. For a photo it usually ends up bigger than the JPG it came from, because it has to record the JPG noise exactly.
A whole uploads folder in one pass
Drop the folder your CMS or video platform exports and each JPG is converted with the same settings, a few at a time. Sorting by the saving column quickly shows which pictures gained the most and which were already lean.
Since conversion happens locally, unreleased thumbnails and client artwork never sit on a third-party server, and there is no queue to wait in.
Questions
What WebP quality equals my JPG?
The scales differ. WebP at 75–80 generally looks like JPG at 85–90 on photos.
Are camera details carried over?
No. Date, camera and GPS fields are left out. Rotation is applied to the pixels first so portraits stay upright.