PNG images — especially screenshots, scanned documents, and graphics with transparent backgrounds — often need to be submitted or shared as PDF files. Converting PNG to PDF preserves the full quality of your image in a professionally formatted, universally compatible document. With transparency support, PNG to PDF conversion maintains crisp logos and graphics without white box artefacts.
PNG vs. JPG for PDF Conversion
When converting to PDF, PNG is the better source format for documents with text, sharp graphics, or transparent backgrounds. PNG's lossless compression means your image quality is preserved exactly in the PDF. Photographs work equally well as PNG or JPG — but for anything with text, logos, or fine detail, PNG will produce sharper results in the final PDF.
| Image Type | Best Source Format |
|---|---|
| Text document / form | PNG (sharper text) |
| Photograph | JPG or PNG |
| Logo on white background | PNG |
| Screenshot | PNG |
How to Convert PNG to PDF Online
- Open the Image to PDF tool at imgresizr.com.
- Upload your PNG file.
- Select paper size — A4 for UK/EU, US Letter for North America.
- Choose whether to fit the image to the page or embed at its original size.
- Click Convert to PDF and download.
Tips for PNG to PDF Quality
High-Resolution PNGs Make Better PDFs
The quality of your PDF is directly tied to the quality of the source PNG. For PDFs that will be printed, ensure your PNG has at least 1240×1754 pixels (A4 at 150 DPI minimum). For PDFs that will only be viewed on screen, 800×1100px is sufficient for a full-page document.
Transparent Backgrounds Become White
PDF does support transparency in certain contexts, but most basic PDF viewers display transparent areas as white. If your PNG has a transparent background and you're converting to PDF for printing, add a white background to the PNG before converting — this prevents unexpected results on different PDF viewers.
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