pdfcosmos

PDF to WebP

Turn PDF pages into compact WebP images. Choose the resolution, quality, and pages, all in your browser.

Free, fast, and privacy-first.

Convert your PDF to WebP

or drag & drop files here

PDF files onlyone file at a timeup to 100 MB each

Convert PDF to WebP, free and fully in your browser

Turn PDF pages into WebP images when you want JPG-beating file sizes without giving up compatibility — a page for a blog post, a lightweight preview for a web app, or a scanned document that has to travel over a slow connection. pdfcosmos rasterizes each page and encodes the WebP entirely on your device, so the PDF never leaves it.

Set the resolution (72 DPI for screens, 150 as an all-round default, 300 for print-sharp), choose the image quality, and convert every page, just the first or last, or a custom range like 1-3, 8, 11-end. A single page downloads as a .webp file and several come back as one ZIP. WebP is the practical middle ground of this family: meaningfully smaller than JPG at a similar quality, and supported by every current browser. For the absolute smallest files try PDF to AVIF, and for lossless text and line art try PDF to PNG.

  • Smaller than JPG

    WebP holds a similar visual quality at a noticeably lower file size.

  • Works in every current browser

    Broad support makes it a safe default for anything headed for the web.

  • Convert any pages

    All pages, the first or last, or a custom range like 1-3, 8, 11-end.

  • Nothing is uploaded

    Pages are rendered and encoded in your browser. No file data leaves your device.

How to convert PDF to WebP

  1. Add your PDF

    Click “Add PDF”, or drag a single file into the upload area.

  2. Choose your settings

    Pick the resolution (DPI), image quality, and whether to convert all pages, the first/last, or a range.

  3. Convert and download

    Click the button. One page downloads as a WebP, several as a ZIP, all in your browser.

Frequently asked questions

Are my PDF files uploaded to a server?
No. The PDF is rasterized and encoded to WebP entirely by your browser. Nothing is uploaded at any step, which you can verify by watching the DevTools Network panel during a conversion.
What is WebP and why use it?
WebP is a modern image format from Google that makes noticeably smaller files than JPG or PNG at a similar visual quality, ideal for the web, where smaller images load faster. Every current browser can display it.
What do the resolution options mean?
The DPI value decides how many pixels each rendered page gets. 72 DPI produces compact files for web use, 150 DPI is the sensible middle ground, and 300 DPI delivers print-level sharpness at the cost of size and speed.
What does image quality change?
Quality sets how hard the WebP is compressed. High keeps the most detail with a larger file. Medium and Low compress harder for smaller files, with a little more blur. Resolution changes the pixel size. Quality changes how hard those pixels are compressed.
Should I use WebP, JPG, or PNG?
WebP usually gives the smallest file at a given quality, so it's the best pick when file size matters and the images stay on the web. Choose JPG for the widest compatibility with older software, or PNG when you need lossless, razor-sharp text and line art. Try our PDF to JPG or PDF to PNG tools for those.
Can I convert only some pages?
Yes. Besides “First page” and “Last page” there's a “Custom range” mode that accepts comma-separated entries such as 1-3, 8, 11-end. A hyphen spans a range and the keyword “end” refers to the last page.
Why did I get a ZIP file?
When your selection produces more than one image, the WebP files are bundled into a single ZIP so you get one download. Converting a single page gives you a plain WebP instead.
Is there a limit to how many pages I can convert at once?
Yes. One conversion is capped at 100 WebP images because the whole job lives in browser memory. Split a long document into ranges, or choose a lower resolution, and convert in passes.
Is PDF to WebP free?
Yes, it's completely free to use, with no account and no watermarks.