PDF to images

PNG or JPG. PNG is lossless, so text edges and thin diagram lines stay crisp. JPG throws away detail your eye is unlikely to miss on a photograph and comes out far smaller. A page of text as a PNG is usually several times the size of the same page as a JPG, and the PNG is usually the one worth having.

What scale means. A PDF page is measured in points, not pixels, so a renderer has to be told how many pixels to use. Scale 1 means 72 pixels per inch, which turns an A4 page into roughly 595 by 842 pixels. Scale 2 doubles both dimensions and quadruples the pixel count. Scale 4 gets close to the 300 pixels per inch that print work asks for.

Higher is not automatically better. Four times the scale is sixteen times the memory, and a page that only ever appears in a slide deck gains nothing from it.

Rendering is real work, done by your own processor, one page at a time. Nothing is queued on a server, which is why nothing is uploaded, and also why a 400 page document at 4x will take a while.

The progress bar shows which page it is on, and the stop button ends the run while keeping every image already made. If the tab feels heavy, drop the scale to 2x or convert a page range at a time. Phones have far less room to work in than laptops, and it is the pixel count rather than the file size that decides.

How do I turn PDF pages into images?

Load the file, pick PNG or JPG and a size, then convert. Each page is drawn to an image at the size you asked for. Save them one at a time, or take the lot as a zip.

Are my files uploaded to a server?

No. The page opens your file with JavaScript running in your own browser, does the work there, and hands you the result as a download. Nothing is uploaded, so there is no server copy to delete and no queue to wait in. You can check this yourself: open your browser's network tab, run the tool, and you will see no request carrying your file.

Should I choose PNG or JPG?

PNG for pages that are mostly text, diagrams or line art: it is lossless, so edges stay sharp. JPG for pages that are mostly photographs, where the file comes out far smaller and the loss is hard to see. PNG files of a text page are often several times bigger than the JPG.

What does the scale setting do?

A PDF page has no fixed pixel size, only a physical one. Scale 1 renders at 72 pixels per inch, which makes an A4 page about 595 by 842 pixels. Scale 2 doubles that to roughly 150 pixels per inch, and scale 4 gets you near 300 pixels per inch, which is what print work usually wants. Higher scales take longer and use more memory.

Why did my long document slow the page down?

Rendering is real work done by your own processor, one page at a time, and a high scale multiplies it. The progress bar shows where it has got to, and you can stop it partway and keep the pages already done.

Can I convert just one page?

Yes. Set the page range before converting, for example 4 on its own, or 4-8.

Is this PDF to image converter free?

Yes, and there is no account, no email box and no watermark on the output. The tool is here because FORKSAI makes study software and this is a useful thing to give away.