PDF ↔ WEBP

WebP is often the smallest of the three image formats and current browsers open it, but some older programs and upload forms still do not accept it.

How to turn PDF pages into WebP images

1. Add the PDF. Leave the Pages box empty for every page, or type a selection such as 1-3,5.
2. Choose the resolution (72, 144 or 216 DPI) and the quality. Quality starts at 90%.
3. Press Convert and download pages.zip with one WebP per page.
4. To build a PDF from WebP files, switch the operation to Image → PDF and add them in the order you want. Each file becomes one page.

What to check first

• The quality slider works as it does for JPG: 10% to 100%, starting at 90%.
• Decide where the files will be used. A web page or a current phone gallery will open WebP. An older editor, or a form that asks for JPG or PNG, may not.
• If the destination refuses WebP, convert the same PDF on the JPG or PNG page instead. Nothing else changes.

Measured example

The same generated 3-page A4 PDF at 144 DPI and 90% quality gave WebP files of 13,174, 13,588 and 13,742 bytes. As JPG the pages were about 40 KB and as PNG about 60 KB. That is a simple graphic page; photographs and scans give different ratios, so check the sizes on your own file.

Limits

• WebP support depends on the program that opens it. Test one file before you convert a whole document.
• WebP at 90% is still a lossy save. Keep the PDF as your master.
• Rendering happens in your browser, so a long PDF at 216 DPI can be slow.

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