Converting a PDF to PNG turns each page into a separate image file. This is useful for sharing a page as an image on social media, embedding a document page in a presentation, creating thumbnails, or using a certificate or report page as a graphic. The conversion is straightforward, but a few choices โ resolution and which pages to convert โ determine how useful the result is.
Why PNG Rather Than JPEG for PDF Pages
PNG uses lossless compression โ no image data is discarded during compression. Text in a PNG image remains sharp and readable at any size. JPEG uses lossy compression that introduces artifacts around sharp edges like text and line art, making it a poor choice for document pages where text legibility matters.
The tradeoff is file size โ a high-resolution PNG of a document page is typically 2-5x larger than the equivalent JPEG. For most use cases involving document pages โ thumbnails, website embeds, social sharing โ PNG quality is worth the extra size. Use JPEG only when file size is the overriding concern and some text softness is acceptable.
Converting With an Online Tool
WukongPDF's PDF to Image tool at www.wukongpdf.com converts PDF pages to PNG directly in the browser. Upload the PDF, select PNG as the output format, choose the pages you need, and download the images. Each page becomes a separate PNG file.
For a multi-page PDF, the tool outputs a ZIP file containing one PNG per page. If you only need specific pages rather than the entire document, select those pages before converting โ there's no need to download and sort through all pages when you only need page 3.
On Mac: Export Directly From Preview
Apple Preview handles PDF-to-PNG conversion natively with no additional software:
- Open the PDF in Preview
- Go to File > Export
- Choose PNG from the Format dropdown
- Adjust the resolution if needed โ higher resolution produces sharper images at the cost of larger files
- Click Save โ Preview exports the currently displayed page as a PNG
For multi-page PDFs, Preview exports one page at a time. Navigate to each page and export individually, or use a script to batch export all pages. For a few pages this is quick; for many pages an online batch tool is faster.
On Windows
Windows doesn't have a built-in PDF-to-PNG converter. The practical options are:
- Online tool: fastest for most users โ upload, convert, download
- Screenshot: for a quick single-page capture, open the PDF at 100% zoom, press Win+Shift+S to capture a region with Snipping Tool, and save as PNG. The resolution will match your screen resolution โ sufficient for web use, not for print.
- Ghostscript (command line): the free open-source tool converts entire PDFs to PNG at any specified resolution with a single command โ powerful for batch conversions
Choosing the Right Resolution
Resolution โ measured in DPI โ determines how sharp and detailed the PNG image is. The right setting depends on how the image will be used:
- 72-96 DPI: screen display only โ web thumbnails, social media previews. Small file size, not suitable for printing.
- 150 DPI: good for embedding in presentations or documents where print quality isn't critical.
- 300 DPI: print-quality โ use when the PNG will be printed or when text legibility at full size is critical.
A 300 DPI PNG of an A4 page is approximately 2,480 ร 3,508 pixels โ a large, sharp image suitable for most professional uses. At 150 DPI the same page is 1,240 ร 1,754 pixels โ good for screen use but may look soft if printed at full size.