The marketplace I sell on will not accept WebP images. How do I prepare mine?
Convert the WebP images to JPEG in one batch at a quality around 90, and choose white as the background for cut-out images with no backdrop. You get genuine JPEG files with the same names in one ZIP, ready to upload. Before that, confirm the accepted formats on your platform's upload page, because requirements vary and change.
Start from the platform's rules, not memory
Platforms and marketplaces usually list the accepted formats beside the image upload button or in their seller help center. We do not name a platform or say what it accepts, because these rules change. What matters for you: if the list says JPG and PNG only, or your images are refused as an unsupported format, JPEG is usually what you want, since it is the lighter of the two for photographs.
Why your images are WebP in the first place
Most often because they came from a supplier's website or from your store on another platform, and websites send images to browsers as WebP to load faster. Sometimes it is because the design app you use exports WebP by default. Either way the images are fine, just in the wrong format for this platform.
Preparing the batch
- Gather the product images in one folder and name each by product code if you can, such as sku-2201.webp.
- Add them to the Image format converter, up to 30 at a time.
- Choose JPEG. The quality slider and the background color field appear.
- Keep quality around 90, which becomes 0.9 internally and gives crisp images for a product page.
- Leave the background white; it fills the transparent areas of cut-out shots.
- Check each row, especially the ones showing the transparency-lost note.
- Download all. sku-2201.webp becomes sku-2201.jpg inside the ZIP.
Cut-outs need a closer look
A product cut-out with no background looks great on your own site, but as JPEG it is painted over the color you chose. White is the usual choice for listings, but if the platform shows images on, say, light grey cards, a white box may appear around the product. Open the preview and compare it with how product pages look on the platform before uploading the whole batch.
If the platform caps file size
After converting, some images may be larger, since WebP is usually more efficient than JPEG. The tool shows the percentage for each one. If any image goes over the platform's limit, run the resulting JPGs through the Image compressor at a slightly lower quality until they fit.
Keep the original WebPs for your own site if you have another store that accepts them; they are lighter there.
Common questions
Should I pick PNG instead of JPEG if the platform takes both?
For photographic product images JPEG is far lighter. Choose PNG only if the platform displays transparent images and you want to keep the transparency.
Are my images uploaded while converting?
No. Conversion happens in your browser, and you upload the files to the platform yourself afterwards.