How to convert PNG to PDF
- Drop your PNG files. Grab the whole set at once and they'll go into one document.
- Order the pages. Drag the thumbnails until the sequence reads right.
- Create PDF, then Download. Every pixel survives the trip.
Screenshots that need to stay readable
Most PNGs start life as screenshots: an error dialog for the IT ticket, a chat thread saved before someone deletes it, a diagram out of a design tool. Sent loose, they arrive out of order and out of context, and pasting them into a word processor resizes them into mush. A PDF holds both the sequence and the pixels.
Mixed folders are welcome, JPG and WebP included, and JPG to PDF is the same tool pointed at photos. Running the other direction, PDF to PNG renders pages back out as images.
Pixel for pixel, and what that costs
PNGs are re-packed into the PDF with lossless compression, so every pixel survives exactly. Nothing is downsampled or approximated, and text in a screenshot stays as crisp in the document as it was on your screen. For evidence, documentation and bug reports this matters: once a screenshot has been re-compressed somewhere along the way, you can no longer swear to its details.
Lossless compression is also much weaker than the lossy kind, so PNG-based PDFs get big, particularly from photographs, where there is no repetition for the compressor to exploit. A folder of screenshots compresses well because interface pixels repeat; a folder of holiday photos saved as PNG does not, and would be far smaller as JPG to PDF. If the result has to fit a size limit, Compress PDF handles it afterwards.
Transparency and page size
A transparent PNG keeps its transparency in the PDF, which means the page colour shows through wherever the image is see-through. On an ordinary page that is white, so a logo with a transparent background looks exactly as you'd expect. It does mean a PNG designed to sit on a dark background will appear on white here, so check anything with pale text before sending it on.
On size: in auto mode each page is made to match its image, at one pixel per PDF point. Screenshots from a high-density display therefore produce pages that read as physically large (a retina capture is twice the pixels of what you saw), which looks right on screen but prints oddly. Choosing A4 or Letter under Options fits each image onto a standard page instead, and is the better choice for anything destined for paper or for merging into another document.
Frequently asked questions
How do I convert PNG to PDF?
Drop the files above, put them in the order you want, click Create PDF. Each PNG becomes a page and the download starts straight away.
Do PNG screenshots keep their sharpness?
They do. PNGs are embedded losslessly, with no re-encoding, so 10-pixel type and hairline borders come out as crisp as they went in. None of the smeared edges you'd get from a trip through JPEG.
Does transparency survive?
The image keeps its transparency, but a PDF page has an opaque background (almost always white), so wherever the PNG is see-through, the page shows through. In practice a transparent PNG looks like it is sitting on white.
Are my images uploaded?
No upload, no server. Keep the network tab open while you convert if you'd like to watch it not happen.