PDF to WebP Converter

1Drop the PDF inIt never leaves your machine.

2Choose pages and resolutionEverything updates as you change it.

3Export the imagesAssembled here and saved from your own browser.

Smaller, where compatibility allows

WebP produces smaller files than JPEG at the same quality. Browsers all read it; older desktop software often does not, so it suits the web more than email.

How to use this tool

Drop a PDF on the box at the top. Every page is rendered so you can see it, and you choose which ones to export.

Set the resolution and the quality, then export. Each selected page downloads as its own WebP file.

Everything happens in this browser tab, so a long document takes a moment while your machine does the rendering.

Smaller files, with one condition

WebP is simply better at compression than JPEG. At the same visual quality it produces smaller files, though how much smaller depends entirely on the page. Measured on a busy photographic page at A4 and 150 dpi the saving was about a fifth; on flatter content it is larger. Over a fifty page document even a fifth is the difference between a comfortable download and an awkward one.

The condition is that something has to open it. Browsers universally can, and have for years, so if these images are going onto a website WebP is the obvious choice and the saving is free.

Away from the browser it is patchier. Older desktop software, established print workflows and plenty of corporate document systems still cannot read a WebP, and handing someone a file they cannot open wastes more of their time than the bandwidth ever saved.

So the honest rule is: WebP for the web, JPEG or PNG for anything crossing an organisational boundary.

A worked check you can repeat

An A4 page is 8.27 by 11.69 inches. At 150 dpi that is 1240 by 1754 pixels, which is 2.18 million pixels. At 300 dpi it becomes 2480 by 3508, which is 8.7 million, four times as many for twice the resolution.

That relationship holds whatever format you export to, so resolution moves the file size far more than the format choice does. A fifth off from the format is worth having, but dropping from 600 dpi to 300 saves three quarters.

The rendering and the sizing were checked against an independent implementation before publishing, including the clamp that stops an oversized page exceeding what a browser canvas can hold. That clamp had a real bug found by fuzzing: rounding both dimensions up after scaling could push the result back over the ceiling and produce a blank image. It is fixed here and in every tool that shares the same sizing code.

Mistakes that catch people out

Sending WebP to someone else. They may not be able to open it. Use JPEG or PNG when the file leaves your control.

Expecting lossless output. The WebP produced here is lossy. For nothing discarded, use PNG.

Chasing format savings while ignoring resolution. Resolution moves file size far more. Halve the dpi before worrying about the format.

Expecting the text to stay selectable. An image is pixels. If you need the words, extract the text instead.

Forgetting the page selection. All pages are selected by default. Deselect the ones you do not want before exporting.

Common questions

Is my PDF uploaded anywhere?

No. The file is opened and rendered by your own browser, and every image is produced here on the page. Nothing crosses the network, so there is nothing on a server to store or delete.

How much smaller is WebP?

It depends on the content. On a busy photographic page measured here at A4 and 150 dpi, WebP came out about a fifth smaller than JPEG. On flatter material the gap is wider. Either way it adds up over a long document.

Why would I not use WebP?

Compatibility. Modern browsers all handle it, but older desktop software, print workflows and some document systems still do not. If the images are going to someone else, JPEG or PNG is the safer choice.

Is WebP lossy or lossless?

Both exist. The output here is lossy, which is the mode that produces the size advantage. If you need nothing discarded, use PNG instead.

What resolution should I use?

150 dpi is right for reading on screen. Use 300 for printing. Pixels grow with the square of the resolution, so 600 dpi is four times the size of 300.

Can I convert only some pages?

Yes. Select the pages you want before exporting, and only those are produced.

Related PDF tools and reference

Reference: ISO 32000, the standard that defines how a PDF page is described.