Sometimes a PDF is the wrong shape for the job. You want to drop a page into a slide deck, attach a preview to a message, or post it somewhere PDFs simply will not open. Converting the PDF to an image fixes that: each page becomes a JPG or PNG picture you can use anywhere an image goes.
We measured this ourselves. Which target is smaller depends entirely on what is printed on the page. Rendering our test document: the photograph page came out at 276.2 KB as JPG against 1.97 MB as PNG, and the text page at 70.7 KB against 114.6 KB. JPG won both times, so it is the right default. Choose PNG only when the page is text or line art and you need it pixel-exact for archiving or OCR. See all our measurements
When to convert PDF to image
- Embed a page in a slide or document — presentation software takes an image far more happily than a PDF.
- Share a preview where PDFs will not display — most social networks and chat apps show a picture inline but hide a PDF behind a download.
- Grab one thing off the page — a chart, a diagram, a receipt, a signature — as a standalone image.
- Post a document as an image — so people see it at a glance instead of tapping to open a file.
JPG or PNG — which should you pick?
Both are images; the difference is how they store the page.
- JPG is smaller and uses lossy compression. It is the right choice when the page is mostly a photo or a scan, where a tiny bit of softening never shows. This is the classic PDF to JPG case, and the smaller file is easier to attach or upload.
- PNG keeps text and thin lines crisp and is lossless, so it is larger. Choose it when the page is a document, a diagram, or anything with sharp edges you want to stay sharp.
Rule of thumb: photo-heavy page → JPG; text, tables and line art → PNG.
Measured on our five-page test document, JPG won both times — and by very different margins. The photo page rendered to 276.2 KB as JPG (-17%) against 1.97 MB as PNG (+504%); the text page to 70.7 KB (-79%) against 114.6 KB (-66%). JPG is therefore the right default, and PNG is worth its cost only when the page is text or line art you need pixel-exact for archiving or OCR.
The JPG-or-PNG question has different answers for different pages of the same document, and that is easiest to see measured. We rendered two pages of our test PDF at 1190 × 1683 into both formats:
| Operation | Input | Output | Change | Detail |
|---|---|---|---|---|
| Photo page | 334.1 KB | 276.2 KB | -17% | p3 · 1190×1683 |
| Photo page | 334.1 KB | 1.97 MB | +504% | p3 · 1190×1683 |
| Text page | 334.1 KB | 70.7 KB | -79% | p4 · 1190×1683 |
| Text page | 334.1 KB | 114.6 KB | -66% | p4 · 1190×1683 |
The photo page came out 276.2 KB as JPG against 1.97 MB as PNG — PNG is many times larger for a page that is mostly photograph. The text page reversed the ratio much closer: 70.7 KB as JPG against 114.6 KB as PNG, and the PNG is the one worth having, because JPEG puts visible ringing around every letter. Pick per page, not per document.
Multi-page PDFs: one image per page
An image is a single page — a PDF is often many. So a converter turns each page into its own image file: a five-page PDF gives you five pictures, numbered in order. That is exactly what you want when you need page 3 for a slide, or when you are posting a two-page document as two images. If you only wanted one page, the extra images are easy to ignore or delete after the fact.
Convert without uploading
A PDF you are turning into images is often a private document — a contract, a payslip, a medical letter. Most free converters make you upload it to their server first, and you rarely know where it lands or how long it stays. You do not have to. This tool renders every page on your own device, so the file never leaves it:
- PDF to JPG — one JPG per page, ready to download.
- PDF to PNG — crisper text and line art.
Keep it sharp
Images do not zoom the way a PDF does, so export at a size that suits where the picture will live. For a full-screen slide or a printed handout, favour PNG at a higher resolution; for a chat preview or a web thumbnail, a JPG at normal size keeps the file light and loads fast.
One more number that sets expectations: those outputs came from a single 334.1 KB source document. A PDF page is not a small thing once rasterised — the photo page alone became 1.97 MB as PNG. Rendering a fifty-page report to PNG will produce a folder far larger than the PDF you started with.
Common questions
- Will the text still be selectable? No — an image is a flat picture, so text becomes pixels. Keep the original PDF if you still need to copy text or search it.
- Can I convert just one page? Convert the file and keep the page you need; the other pages download alongside it and can be deleted afterwards.
- Is there a file-size limit? There is no server limit, because nothing is uploaded — the practical ceiling is your device’s memory. Very large or image-heavy PDFs just take a little longer.
- Which is better quality, JPG or PNG? PNG, for anything with text or sharp lines, because it is lossless. JPG is fine — and smaller — for photo pages.
The other direction
Going the opposite way — building a PDF from images? See How to combine images into a PDF or jump straight to JPG to PDF. And if the source PDF is huge, compress it first.