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Drop one WEBP or two hundred. Batch conversion is not a paid feature here.
Images saved from a website came down as WEBP and need to be sent as a single document.
Each WEBP is decoded and placed on its own PDF page. PDF has no native WEBP support at all, so the image must be re-encoded on the way in, normally as JPEG inside the page.
Because PDF cannot store a WEBP stream, this is the one image-to-PDF path that always re-compresses. A lossy WEBP going into a JPEG carrier is a second lossy generation, so raise the quality setting for anything with text or fine lines in it.
PDF's image filters were fixed long before WEBP existed. DCTDecode is JPEG; there is no WEBP filter and there will not be one.
Transparent areas are composited onto the page background, normally white, before the image is embedded.
Drop one WEBP or two hundred. Batch conversion is not a paid feature here.
Portable Document Format is lossy, so the quality control decides the trade between size and fidelity.
Instant, because the file never went anywhere. Nothing expires, since nothing was stored.