How to Convert a PDF to Images

Why convert a page to an image at all

There are three ordinary reasons. One is a deadline, when an image in a chat or an email gets read where the PDF would not open. One is size, because a long document is often heavier than the attachment limit allows. The third is diligent, because an image is the only form of a page that looks the same on every device, from a phone browser to a decade-old reader. All three are about the destination rather than the document.

Resolution is the only setting that matters

The blurry exports people complain about come from a low resolution setting, not from the conversion itself. The page is drawn at whatever size you ask for and then stored as pixels, so asking for a small image gives you a small image that stays small when you zoom in. For reading on a screen, a moderate width is plenty. For printing, or for reading on a large monitor, ask for the full size the page offers and accept the larger files.

How to export one image per page

• Open the PDF to image tool and load the document, then check how many pages it holds before exporting anything.
• Choose the resolution. Pick the higher option if the images will be printed or read on a large screen, the standard one for quick sharing.
• Pick the image format. JPG keeps files small for photographs and scans; PNG stays lossless, which matters for diagrams, line art and screenshots with text.
• Export. Each page is written to your device as its own file, so you can name and sort them afterwards.
• Open the first image at full size and look at a line of small text. That single check tells you whether the resolution was high enough.

JPG or PNG, depending on what the page is

A scan of a signed contract is a photograph-like image, so compression is fine and the smaller file is worth having. A diagram, a spreadsheet or a screenshot of software is line art: it has sharp edges and flat colours, and JPG rounding turns those edges into visible fringing. For anything with text that has to be legible, PNG is the honest choice even though the files are bigger.

What converting does to text and links

An exported page is a picture, so the text is no longer selectable, no longer searchable, and no longer follows a link. That is the trade you are making, and it is worth stating plainly because it is the most common regret afterwards: people convert to send quickly, then find they cannot copy a paragraph out of it. If the text still matters, share the PDF itself and use an image only when the reader will read it once.

Doing it locally means nothing is uploaded

Rasterising a page means drawing it and storing the result, which is work your device does after the page has loaded. There is no upload round trip and no size cap, so the whole document can go in one pass. If the pages are sensitive, that is the relevant difference: the images are produced on your machine, so no copy of the document is sitting on a server waiting in someone else's queue.