How to Convert PDF Pages to PNG Images Online
Converting a PDF to PNG produces lossless image files from each document page — preserving sharp edges, flat colours, and transparent areas that JPG encoding would degrade. PNG output is the preferred choice for PDFs containing technical diagrams, flowcharts, logos, infographics, or any content with text at small sizes where JPEG compression artefacts would be visible.
Why PNG instead of JPG for PDF conversion
JPEG uses lossy compression — it discards subtle colour information and introduces block artefacts around high-contrast edges, especially around text. PNG is lossless: every pixel is encoded exactly. This means that a PDF page with a company logo, precise line drawings, or small printed text will convert to a PNG that is pixel-perfect, while the same page converted to JPG at standard quality may show visible degradation around edges and fine lines.
Transparency support
PNG supports an alpha channel, which means pages with transparent backgrounds (uncommon but present in some PDF types) will retain their transparency. This is particularly useful when extracting graphical assets from PDFs for use in design tools — you get a clean image without a white background that needs to be removed separately.
How the conversion works
The tool uses PDF.js to render each page to a Canvas at your chosen resolution, then exports the Canvas as a PNG Blob. The entire process is browser-native — no server upload. For multi-page PDFs, all pages are converted and packaged into a ZIP download automatically.
Resolution guide
150 DPI — screen preview, thumbnails, web use. 200 DPI — standard quality for presentations and digital documents. 300 DPI — print quality; use this when the image will be printed, included in a high-resolution design file, or displayed at large sizes.
Related tools
For photographic PDF pages where file size is a priority and lossless quality is not required, use the PDF to JPG converter instead. To compress the resulting PNG files, use the PNG compressor. To resize images to specific dimensions, use the image resizer.