Sometimes a PDF will not go where you need it. A slide deck wants a picture, not an attachment. A chat app will preview an image inline but hide a PDF behind a download. A web form accepts .jpg but not .pdf. In all these cases you want to turn a PDF page into an ordinary image — and the two questions that decide the result are which format and at what resolution.
Turning a page into an image makes it universally viewable — anything can open a JPG or PNG. But it is a one-way trade. The moment a page becomes an image, any real text inside it becomes pixels. The result is not searchable, not selectable, and cannot be edited as text. If you later need the words, you would have to run OCR to recover them.
They compress pictures in opposite ways, and each is right for a different kind of page.
| JPG | PNG | |
|---|---|---|
| Compression | Lossy — discards detail to shrink | Lossless — keeps every pixel |
| File size | Much smaller | Larger |
| Sharp text & lines | Softens edges; can add faint halos | Stays crisp |
| Photographs | Excellent | Wastefully large |
| Transparency | No | Yes |
Rule of thumb: a page that is mostly text, a table, a diagram or a line drawing → PNG. A page that is a photograph or a colour scan → JPG. When in doubt for a document page, PNG keeps text readable; when file size is the priority, JPG wins.
An image has no inherent "size" the way a PDF page does — it is just a grid of pixels. Export a page too small and the text turns to mush when someone zooms in. Export it too large and you get a 15 MB file to send a single page.
Going the other way — combining several photos or scans into one PDF — is just as common. If you have a stack of page photos and want a single document to send, use Image → PDF: add the images in order and export one clean file. This is the tidiest way to turn a pile of phone snaps into something that looks like a proper document.
Each page becomes its own image — that is how page images work. To share the whole thing as a single file, keep it as a PDF, or merge the pages back after editing.
Either the export resolution was low, or you used JPG on a text-heavy page. Re-export at a higher resolution, and switch to PNG for pages of text.
Yes. Both formats reproduce colour. JPG may shift very subtle tones slightly because of its compression; PNG reproduces them exactly.