How it works
The PNG to PDF converter embeds one or more PNG images into a PDF document — with each PNG on its own page, sized to fit A4, Letter, or the image's native dimensions. PNG files retain their transparency layer (converted to a white background in the PDF, since PDF doesn't support page-level transparency). Use it for document submission, archiving, or sharing images in a universally openable format.
Many institutional submission systems (government portals, court filing systems, university submission platforms, HR document portals) accept PDF but not PNG. Converting a PNG scan, screenshot, or diagram to PDF before submission ensures it opens in every environment.
How to use it: upload one or more PNG files. Drag to reorder. Select the page size and orientation. Set margins. Click Create PDF and Download.
Multiple images: when uploading multiple PNGs (e.g., scanned multi-page document photos), each PNG becomes one page in the output PDF. The ordering is set by your drag-and-drop arrangement.
Image quality: PNG images are embedded as lossless bitmaps in the PDF. There is no recompression — the embedded image data is identical to the source PNG pixels. The PDF file size is approximately equal to the sum of the PNG file sizes.
Privacy: PNG-to-PDF conversion runs in the browser using pdf-lib. Your images are never uploaded.
Frequently Asked Questions
- Set margins to 0 and choose 'Fit to page' scaling. This stretches or scales the PNG to fill the exact page dimensions. For a perfect fit without distortion, ensure your PNG's aspect ratio matches the page's aspect ratio.
- PDF pages don't support true transparency — the transparent areas in the PNG are filled with a configurable background color (white by default) in the PDF output. Choose a background color matching your intended display context.
- PNG images embed as lossless bitmaps, which are large. After creating the PDF, run it through the PDF Optimizer tool with a 'Web' or 'Screen' profile to re-encode the embedded PNG as JPEG at a configurable quality. This typically reduces file size by 50–70%.
- Yes. Upload a mix of PNG and JPG files — each becomes one page regardless of format. The PDF embeds each image in its native format (PNG as lossless, JPG as JPEG compressed).