How to convert a PDF to JPG (every page or just one)

Converting a PDF to JPG means executing the page's drawing instructions once, at a resolution you choose, and freezing the result into a grid of pixels. A PDF page is a set of instructions — draw this glyph here, place this photo there — which a reader re-runs at whatever zoom you use. A JPG is the finished picture at one fixed size. That is why the DPI you pick before converting is the single decision that matters: everything else can be redone afterwards, resolution cannot.

The quickest route here: open PDF to JPG, drop the file, choose a resolution, leave Pages empty for the whole document or type something like 1-3, 5, then click Convert to JPG. One page gives you one image; several give you a ZIP. The rendering happens in your browser with pdf.js, the same engine Firefox uses to display PDFs, so the file stays on your device.

The three ways to turn pages into images

Method	Good for	Watch out for
A browser tool like this one	Any device, choosing pages and DPI, nothing to install	Long documents at 300 DPI use a lot of memory
Desktop software (Poppler, ImageMagick, GIMP, Acrobat)	Hundreds of files, scripting, exact colour control	Installation; ImageMagick needs Ghostscript for PDFs
Built-in OS features	One page on a Mac	macOS Preview only; Windows, iOS and Android have no PDF-to-image export

On macOS, Preview exports properly: open the PDF, File → Export…, set Format to JPEG, and use the Resolution field to enter a DPI rather than accepting the default. For several pages, show the thumbnail sidebar, select them, then File → Export Selected Images…. On Windows, nothing built in converts a PDF page to an image; the Snipping Tool captures what is on screen, which means screen resolution — fine for a quick illustration, not for print. On iPhone and Android the same applies: a screenshot gives you the page at the size of your display, and nothing in Files, Books or Google Drive exports a page as a JPG.

On the command line, Poppler's pdftoppm -jpeg -r 300 file.pdf page writes one JPEG per page at 300 DPI and is the most predictable option. ImageMagick does the same with magick -density 300 file.pdf page-%02d.jpg, where -density must come before the input file or it is applied after rasterising and you lose the resolution you asked for. GIMP shows an import dialog with a resolution field, and Acrobat has Export To → Image → JPEG.

Which DPI to choose

DPI decides how many pixels each page gets. A PDF measures its pages in points, 72 to the inch, so 72 DPI gives exactly one pixel per point — an A4 page comes out at 595 × 842 pixels. Every step up multiplies the pixel count by the square of the ratio.

Resolution	A4 page	Good for
72 DPI	595 × 842	Previews and thumbnails; small text is unreadable
150 DPI	1240 × 1754	Screens: email, messaging, slides, web pages
220 DPI	1819 × 2572	Zooming into plans, tables or small print
300 DPI	2480 × 3508	Printing, or when someone asks for "print quality"

An A4 page at 300 DPI holds four times as many pixels as the same page at 150 DPI, so the file is several times heavier and takes noticeably longer to render. Going above what you actually need buys nothing. DPI explained works through the arithmetic if you need to match an exact pixel size.

What converting to JPG does to your page

• Text becomes pixels. It cannot be selected, searched, copied or read by a screen reader. If someone will need to quote from the document, keep the PDF.
• Links, bookmarks and form fields stop working. Buttons and fields are drawn as they look; they do not respond.
• One image per page. A 40-page report becomes 40 files, which is why the tool zips them.
• Transparency disappears. JPG has no alpha channel, so anything transparent is flattened onto white.
• JPEG is lossy. The JPG quality slider runs from 50 to 100 %, with 90 % as a sensible default. Below about 80 % you start seeing halos around letters and edges.

When JPG is the wrong format

JPEG was designed for photographs — smooth gradients, no hard edges. Pages of text, tables, diagrams and screenshots have nothing but hard edges, and that is exactly where its compression leaves faint smudges around the strokes.

• Photos, brochures, scanned pages, marketing PDFs: JPG. Files stay small and the difference is hard to see.
• Text, spreadsheets, line drawings, screenshots of documents: PDF to PNG gives crisp letters because PNG is lossless. Expect files several times larger.

Convert one page both ways and compare at 100 % zoom if you are unsure. JPG vs PNG vs WebP explains the trade-offs in more detail.

Common problems, and what they mean

The pages come out blank or all white. Some PDFs draw their content in a layer the renderer cannot reach, and encrypted files cannot be rendered at all. Open the file in a PDF reader, print it to a new PDF, and convert that copy. If it asks for a password, remove it first with Unlock PDF — assuming you know it.

The image is blurry when I zoom in. It was rendered at too low a DPI. Convert again from the PDF at 220 or 300; sharpness cannot be added to an existing image afterwards.

A scanned page comes out sideways or tilted. The image reproduces the page exactly as stored. Straighten it in the PDF first with Rotate PDF, then convert.

My phone runs out of memory on a long document. Every page is rendered on your own device, and a 300 DPI A4 page is 8.7 million pixels. Convert a range at a time, drop to 150 DPI, or use a computer.

The images are too heavy for an upload form. Lower the DPI first — it has by far the biggest effect — then, if needed, run them through Compress Image.

Questions people ask

Can I get back a PDF from the JPGs? Yes, with JPG to PDF, but the text stays an image. The round trip does not restore what rasterising removed.

How do I extract the original photos embedded in a PDF? This tool renders whole pages, so you get the page as it looks, not the source images at their own resolution. A desktop tool such as pdfimages from Poppler pulls out the embedded files.

I only need a few pages as a PDF, not as images. Use Split PDF instead: the pages stay a PDF, with selectable text.

Are my files uploaded? No. The conversion runs in your browser, on your device, which is also why very large documents depend on your own memory.

Which quality setting should I use? Leave it at 90 % unless the file has to be small. Re-encoding a JPEG again later compounds the loss, so decide once.

Next steps

• Crisper letters for text pages: PDF to PNG
• Make the images lighter: Compress image, and the guide How to reduce image file size
• Go the other way: JPG to PDF, and the guide How to turn photos into a single PDF