Converting a PDF to PNG turns each page into a separate image file. It's useful when you need to embed a PDF page into a presentation, share a single page as an image, use a document in a context that only accepts image formats, or extract visual content from a PDF without the overhead of a PDF viewer.
Why PNG and Not JPEG?
PNG uses lossless compression, which means text stays sharp and fine details don't degrade. JPEG uses lossy compression and introduces visible artifacts around high-contrast edges โ exactly the kind of thing that appears around text characters. For PDF pages with any amount of text, PNG produces noticeably cleaner output. JPEG makes more sense only when the PDF page is primarily photographic and file size is a priority.
Browser-Based Conversion
WukongPDF's PDF to Image tool converts PDF pages to PNG directly in the browser. Upload the PDF, select PNG as the output format, choose the resolution if the option is available, and download. Multi-page PDFs produce one PNG file per page, usually delivered as a ZIP archive. This works on any device without installing anything and handles the most common conversion scenarios well.
Resolution matters here. At 96 DPI the output looks fine on screen but prints poorly. At 150 DPI it's good for most purposes. At 300 DPI the PNG is print-quality but the file size increases substantially โ a 300 DPI PNG of a letter-size page can be 5-10MB. Choose the resolution based on how the image will be used.
On Mac: Export From Preview
Preview makes this straightforward. Open the PDF, go to File โ Export, and change the Format dropdown from PDF to PNG. You can also set the resolution here โ the default is 150 DPI which is fine for most uses. Preview exports the current page only, so for a multi-page document you'd need to navigate to each page and export separately, or use a different tool for batch conversion.
For converting all pages at once from the command line on Mac, the sips command or ImageMagick (installable via Homebrew) can process the entire PDF in one command. This is worth knowing if you regularly need to convert multi-page documents โ it's significantly faster than exporting page by page through Preview.
On Windows
Windows doesn't have a direct built-in PDF-to-PNG path. The most practical free option is a browser-based tool. Alternatively, taking a screenshot of the PDF page in a viewer and saving as PNG works for quick one-off conversions โ the resolution is limited by your display, but for sharing purposes it's often sufficient. For higher quality or batch conversion, the browser tool is the better choice.
Transparency in PNG Output
One advantage PNG has over JPEG that's worth knowing: PNG supports transparency. If a PDF page has a transparent background โ common in logos, illustrations, or design assets exported to PDF โ converting to PNG preserves that transparency as an alpha channel. The resulting PNG can be placed on any background without a white box appearing around it. JPEG doesn't support transparency at all; converting a transparent PDF to JPEG produces a white background automatically.
Most PDF pages have a white background and this distinction doesn't matter. But for design assets or documents with intentional transparency, PNG is the only image format that preserves it.