PDFtoWebP
Convert PDF to WebP
Up to 3 files at once, 100 with Pro. Mixed formats are fine.
Converting PDF to WebP keeps a document page readable at a fraction of the size of a PNG, which makes it the right format for a preview or thumbnail on a website. Set the render width to about twice its display size, drop the file above, and the first page is drawn in your browser.
PDF to WebP, PNG or JPG: which to pick
There are three sensible ways to turn a PDF page into a picture and they are not interchangeable. JPG is small and smudges text. PNG is sharp and large. WebP is the one that does both jobs adequately, which makes it the right answer for the web and a slightly odd one anywhere else.
Why a document thumbnail should be WebP
If you are showing a document preview on a site — a thumbnail of a report, the cover of something downloadable, a page embedded in an article — the image is competing with everything else on the page for load time.
A PNG of a text page is sharp and can easily be several hundred kilobytes. The same page as a WebP is typically a fraction of that, and the text still looks clean because WebP handles hard edges far better than JPG does. That combination is what nothing else offers.
Choosing the render width for a thumbnail
This is the setting worth getting right, and it works differently here than for a photograph. A PDF stores instructions rather than pixels, so the page is drawn at whatever size you ask for, at full sharpness.
The useful rule is to draw at roughly twice the size the image will actually occupy on screen. A thumbnail displayed 300 pixels wide should be rendered at 600, which costs a little file size and looks visibly better on a phone or a high-density laptop screen, where everything else on your page is already being drawn at that density.
Keep the quality high for small text
WebP is forgiving of hard edges compared to JPG, but it is still a lossy format at the default setting, and a page of eight-point footnotes will start to soften if you push it down. For a document page, a high quality setting still produces a file dramatically smaller than PNG — the saving is there without having to reach for it.
When not to use WebP
Anything leaving the browser. A page going into a printed report, a slide deck, an email attachment or somebody else's document should be a PNG, because some desktop software still does not read WebP and you will not be there to explain it. WebP is a format for the web, and this conversion is for pages that are staying there.
As with the other PDF conversions, you get the first page, and the words become pixels — the result cannot be searched or selected. If the text matters to a search engine, put the text on the page as text and use the image alongside it.
How to make a WebP preview from a PDF
- Drop your PDF onto this page, or click to choose one.
- The first page is drawn as an image.
- Download the WebP, or set the width to twice its display size first.
PDF vs WebP: a page rendered for the web
| WebP | ||
|---|---|---|
| Full name | Portable Document Format | WebP Image |
| File extension | .webp | |
| Media type | application/pdf | image/webp |
| Compression | Either, depending on the setting | Either, depending on the setting |
- Quality
- The result is a close reconstruction rather than an exact copy. Check it before relying on it.
- Where it runs
- This conversion is not available yet. The page describes what it will do once the engine ships.
- What can be lost
- The result is an image. Text in it is no longer selectable or searchable.
PDF to WebP: sharpness, size and pages
- Are my PDF files uploaded anywhere?
- No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.
- Why WebP rather than PNG for a PDF page?
- Size. WebP handles both text and photographs well and produces a much smaller file than PNG for the same page. On a website that is the whole point; for a page going into a printed document, PNG is still the safer choice.
- Does the text stay sharp in a WebP?
- Much better than in a JPG, which is the real comparison. WebP handles hard edges far more gracefully, so letters stay clean. At very low quality settings you will start to see softening — for a page of small text, keep the quality high.
- Which page do I get?
- The first. A WebP holds one image; extracting every page is a PDF tool rather than a conversion and is not built yet.
- What size should I render the thumbnail at?
- Match it to the space it will occupy on the page, then double it for high-density screens. A PDF has no fixed resolution, so drawing at twice the display size costs nothing but file size and looks noticeably better on a phone.
- Will the thumbnail help the page rank?
- Not on its own — the words in the image are pixels and no crawler reads them. Put the text on the page as text and use the image alongside it.