Converting a PDF to WebP produces high-quality compressed images of each page. WebP is a modern format developed by Google that typically achieves 25-35% smaller file sizes than equivalent JPEG images, and 25-50% smaller than equivalent PNG — at the same perceptual quality.
When to use WebP over JPG or PNG
WebP is the right choice when the images will be displayed on a website or web application where file size affects page loading speed. It is not the right choice when you need universal compatibility with older software, email clients, or Windows systems that may not support the format.
For web use: WebP. For email attachments or software that may not support modern formats: JPG or PNG.
On-device, 300 DPI
The PDF to WebP tool runs entirely in your browser using pdf.js to render each page at 300 DPI. The rendered pixels are then encoded as WebP using the browser's native image encoding. No upload occurs — everything happens locally.
WebP file sizes vs JPG and PNG
At equivalent visual quality, WebP produces files approximately 25-35% smaller than JPEG and 25-50% smaller than PNG. For a typical A4 PDF page rendered at 300 DPI (2480x3508 pixels), a JPEG at 90% quality is around 800-1200 KB. The same page as WebP at comparable quality is typically 500-800 KB.
The practical difference matters most when you are embedding many PDF pages in a web application where total asset size affects loading time.
Compatibility
WebP is supported by all modern browsers (Chrome, Firefox, Safari 14+, Edge). It is not supported by all desktop applications or older systems. For web use, embed PDF page images in a website or web application, WebP is the right format. For print, archiving, or cross-application compatibility, choose JPEG (lossy, smaller) or PNG (lossless, larger).
Output
The PDF to WebP tool renders each page at 300 DPI using pdf.js and encodes the result using the browser's native WebP encoder. Multi-page PDFs produce multiple WebP files packaged as a ZIP archive, with one file per page.