Why convert PNG to PDF?
PNG is the go-to format for screenshots, diagrams, infographics, and design exports. But when you need to share a set of images as a single portable document — a bug report with screenshots, a portfolio page, a product specification with diagrams — PDF is the right delivery format. Recipients get one file, page-ordered exactly as intended, that opens on any device without needing an image viewer.
Converting PNG to PDF is especially common for software developers (screenshot-based QA reports), designers (exporting Figma or Sketch pages to PDF for client review), and educators (packaging slide screenshots into a downloadable handout). The visual quality of lossless PNG is fully preserved inside the PDF when you choose lossless embedding.
There are two common merge modes: converting each PNG into its own single-page PDF (useful for archiving individual images with document metadata), and merging a batch of PNGs into one multi-page PDF (useful for presentation decks, report appendices, and portfolios). File Converter Pro supports both in the same session.
All conversion happens offline on your Windows 10 or 11 PC — no upload of your screenshots or design files to any third-party server.
How to convert PNG to PDF on Windows
- Install File Converter Pro. Download File Converter Pro from the Microsoft Store. The free trial supports PNG to PDF at full resolution.
- Add PNG files to the queue. Drag PNG images or a folder into the app. Set the order you want by dragging files in the queue — this becomes the page order in the merged PDF.
- Choose merge mode and page settings. Select "Merge all to one PDF" or "One PDF per image." Set page size (A4, Letter, or fit-to-image) and whether to centre images with white margins.
- Convert offline. Click Convert. The PDF is generated locally. A 20-screenshot QA report generates in seconds.
Batch conversion for big folders
Screenshot-based documentation, design deliverables, and portfolio packages all involve converting many PNGs to a single PDF. File Converter Pro handles this without per-page limits.
- Merge hundreds of PNG screenshots into one PDF — no page cap.
- Drag to reorder pages in the queue before converting.
- Choose A4 / Letter or fit-to-image page sizing for each run.
- No upload — design files and proprietary screenshots stay local.
Quality settings that actually matter
PNG images can be embedded in PDF in two ways:
- Lossless (PNG data inside PDF): pixel-perfect quality, larger PDF. Use for architectural diagrams, technical screenshots, and design exports where precision matters.
- JPEG in PDF (quality 85-95): smaller file, slight lossy compression. Good for screenshots and photos where the PDF will be read on screen rather than printed.
- DPI options: preserve source DPI for accurate print sizing, or downsample to 96/150 DPI for screen-only PDFs with smaller file size.
- Transparency handling: transparent PNGs are composited on a white background in the PDF (PDF does not support page-level transparency).
Common issues and fixes
- Images appear very small on the PDF page. Enable "fit to page" or "scale to fill" in the output settings. Default is to embed at the image''s actual pixel dimensions.
- Transparency shows as black. PDF pages do not support transparent backgrounds. Enable the "white background" option to correctly composite transparent PNGs.
- Large PDF file size. Switch from lossless to JPEG quality 85 embedding to reduce PDF size significantly while keeping text and screenshots readable.
- Wrong page order in merged PDF. Drag files in the queue to set page order before clicking Convert.
Related conversions
FAQ
Can I merge multiple PNG files into one PDF?
Yes. Add all your PNGs to the queue, set the order by dragging, choose "Merge all to one PDF" mode, and click Convert. All images become pages in a single PDF.
Will the PNG image quality be preserved in the PDF?
With lossless embedding (the default), pixel quality is preserved exactly. If you choose JPEG embedding for smaller files, slight lossy compression is applied — use quality 90+ to keep it minimal.
Can I convert PNG to PDF without uploading my screenshots?
Yes. File Converter Pro runs entirely locally on Windows. Your screenshots, design files, and proprietary images never leave your machine.
What page size does the PDF use?
You can choose A4, US Letter, or "fit to image" (which makes each PDF page exactly the size of the source PNG in points at its source DPI). Fit-to-image is useful for screenshots.
Ready to convert your PNG files?
Download File Converter Pro from the Microsoft Store and convert your PNG images to PDF offline — merge any number of screenshots into one professional document, no upload, no watermark.