How to convert a PDF to PNG images

Converting a PDF to PNG means drawing each page and saving that drawing as an image. You do this when a form only accepts pictures, when you need a preview someone can open without a PDF reader, or when a diagram has to be dropped into a slide. You do not do it when you still need to select text, keep the file tiny, or edit the original vectors.

PDF to PNG renders the pages in your browser and downloads the images. A one-page PDF becomes one PNG. A longer PDF becomes a ZIP of PNGs, one file per page.

PNG versus JPG for a page

JPG is efficient for photographs because it is allowed to blur detail you are unlikely to notice. A PDF page is often the opposite: type, rules, logos, and flat colors. JPEG turns those edges slightly muddy, and the muddiness gets worse if someone saves the JPG again later.

PNG is lossless. The pixels you render are the pixels in the file. Text stays crisp, and a solid color stays solid. The file is larger. That trade is usually worth it for a contract page, a user-interface capture, or a line drawing. Use PDF to JPG instead when the page is a scan of a photo and you care more about size than about a perfectly sharp caption.

Sharpness is the pixel size of the drawing

A PDF page does not have a single pixel size. It has a physical page, and the renderer decides how many pixels to use. Screen uses fewer pixels and makes a smaller PNG. Balanced is the default and is enough for reading on a laptop. Sharp uses more pixels, which helps small type and fine lines, and it makes a heavier file.

There is a ceiling. A page that would exceed 8192 pixels on the long side is scaled back so the browser does not run out of memory. If you need a poster-sized raster, export from the app that created the PDF. For a normal letter or A4 page, Sharp is already a dense image.

• Screen: a quick preview or a thumbnail-sized insert.
• Balanced: reading the page on a screen, which is the right default.
• Sharp: small print, stamps, or a diagram you will crop later.

Multi-page files and the ZIP

Each page is its own PNG. The names use the PDF’s file name plus the page number, so a document called lease.pdf produces lease-page-1.png, lease-page-2.png, and so on. One page, and only one PDF in the list, downloads as a single PNG. Everything else downloads as a ZIP so you are not clicking save dozens of times.

You can add more than one PDF. The same sharpness applies to each. A failure on one file, usually a damaged document, is reported next to that name and the other files continue. Encrypted PDFs are refused. This page does not ask for a password, because typing a password into a website is a habit worth not starting. Remove the password in a tool you trust, then render the pages.

What you lose from the original PDF

The PNG is a picture of the page. Text is not selectable. Links are not clickable. Form fields, comments, and layers are gone. A vector logo becomes pixels at the sharpness you chose; zooming far past that only shows the pixels. If you might still need the real document, keep the PDF. The PNG is a copy for places that cannot take it.

Color is what the renderer draws, including a white background behind transparent artwork on the page. That matches what you see when you print. It is not a way to pull an embedded image back out at its original resolution. A photo placed on the page is redrawn at the page’s pixel size, which can be more or less than the photo’s own pixels.

A practical order of work

Open the PDF locally first and confirm it is the right file and that it is not password-protected. Then use PDF to PNG, pick Balanced unless the type is tiny, and export. Open the first PNG and the last one before you send the ZIP. Check that the page numbers in the file names match the order you expect, and that a scan is rotated the way you want. This tool does not rotate pages; fix that in the PDF first if you need to.

Rendering stays on your device. The PDF is not uploaded to be turned into images. If the tab becomes slow, the document is large for the sharpness you chose. Drop back to Balanced, or split the PDF and convert the part you actually need.