The pictures I saved from a supplier's website are WebP; can they go into a PDF?

Why website pictures arrive as WebP

Many stores and supplier sites serve their images as WebP because it keeps pages light. When you save a product picture from the browser you usually get that format, whatever the file name suggests. It makes no difference in your gallery, but it matters for a PDF, because WebP is not one of the image types a PDF can carry.

What the tool does with a WebP file

1. When you add it to Images to PDF, it is decoded in the browser and drawn onto a temporary canvas.
2. The tool checks whether the picture has any transparent pixels.
3. If it does, the picture is saved as PNG so the transparency survives, and the page background shows through it.
4. If not, it is saved as JPEG at quality 92, a high setting where the loss is hard to spot.
5. A line next to the file name says WebP cannot go into a PDF and that it was converted to PNG or JPEG.

From then on the converted picture behaves like any other: you order it and it is placed on its page by your settings. The size shown next to it in the list is the size after conversion, not the size of the original WebP.

The size surprise you may notice

WebP compresses very well. A light WebP product picture can become noticeably larger as a JPEG at quality 92, and much larger as a PNG if it has transparency. So a PDF of ten WebP pictures may weigh more than you expected. Watch the sizes in the list and in the result line after building.

When to convert the pictures yourself first

• When the PDF has a size limit: convert to JPEG with the Image format converter at a quality you choose, such as 80, then add them. They are then embedded as they are with no second conversion.
• When a picture has a transparent background and you do not want the page color behind it: convert it to JPEG on white before building.
• When you also want the pictures themselves in a common format for use elsewhere: converting first gives you those files, whereas the PDF tool's conversion happens inside it and is not downloadable on its own.

Before you put supplier pictures in your catalog

Supplier images may carry their logo or watermark, and they are often small because they were made for a product card on a website. Check the pixel size shown beside each picture: a 600 px wide image looks fine on screen but soft when stretched across a full A4 page. And ask the supplier before you distribute their photos to your customers.