Single image to PDF
Upload the WebP, choose a page size, and convert. Auto keeps the image's own dimensions as the page; A4 and Letter fit it to a standard sheet with the orientation you pick, which is what most submission systems expect.
Merging several images
Upload multiple WebP files and they become one paginated PDF in the order you arrange them, rather than separate documents. This is the right way to submit a multi-page scan, an expense claim or a photo portfolio.
Choosing a page size
Use A4 or Letter when a form specifies a paper size or the document will be printed. Use auto when the images have unusual proportions and you would rather not have large white margins.
Transparency
PDF pages are opaque, so any alpha channel is composited onto a background colour on the way in. White is the default; set it deliberately if your source has a transparent background.
What you lose
A PDF built from images contains no selectable text. If the source was a screenshot of a document, run it through OCR first if the text needs to be searchable.