PNG to PDF
Screenshots in, one document out — nothing uploaded.
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Accepts PNG. No size limit, no sign-up.
Drop in PNG files and get back a single PDF with the pages in the order you arranged them. PNG is what almost every screenshot tool produces, and PDF is what almost every system that accepts documents asks for, which is why this particular conversion comes up so often.
Why PNG in particular ends up needing this
PNG is the default output of the Windows Snipping Tool, macOS screenshots, most browser extensions, and nearly every diagramming and design export. It is a lossless format, so a screenshot stays pixel-exact — no blurred text, no ringing around letters.
That is exactly why people have folders full of PNGs they now need to submit as a document. Expense claims, bug reports, insurance evidence, proof of a bank transfer, a sequence of settings screens for IT support: the receiving end wants one PDF, in order, not eleven attachments named Screenshot 2026-08-09 at 14.22.31.png.
What happens to a transparent background
This is the one real difference from converting JPGs, and it catches people out. PNG supports an alpha channel; PDF pages have no concept of a transparent canvas that a viewer will fill in for you. So a logo with a transparent background placed on a PDF page inherits whatever is behind it — which in almost every reader is white, but in a dark-mode reader or when printed on coloured stock may not be.
If you need certainty, flatten the transparency before converting: open the PNG, place it on a white layer, export, then build the PDF. If the PNG is a screenshot, this does not apply — screenshots are fully opaque.
Fit to image, or force A4
Fit to image gives every page exactly the pixel dimensions of the PNG it contains. Nothing is scaled and nothing is cropped, so text in a screenshot stays as sharp as it was. Choose this when the PDF will be read on a screen.
A4 centres each image on a standard page with a margin. Choose this when the file will be printed or submitted to a system that assumes a conventional page size. Images wider than the printable area are scaled down proportionally. Smaller images are left at their natural size rather than blown up, because enlarging a screenshot only makes the text softer.
One practical note about screenshot dimensions: a modern phone or high-DPI laptop screenshot can be 2,800 pixels wide. In "fit to image" mode that produces a very wide PDF page. That is not a fault — it is a faithful record — but if the document needs to look like a printed page, A4 is the right choice.
Size, and how to keep it reasonable
PDF embeds PNG data losslessly, so the resulting document is roughly the sum of the input files plus a small overhead. Twenty full-screen PNGs at 1.5 MB each make a 30 MB PDF, and some upload forms cap attachments at 10 MB.
If that is a problem, the honest fix is to accept some loss: convert the PNGs to JPG at quality 80 first, then build the PDF. For screenshots containing text this is a real trade-off — JPEG blurs hard edges — so check one page before doing all of them. We would rather say that plainly than offer a "compress" button that silently degrades your evidence.
Why nothing is uploaded
The PDF is assembled by pdf-lib running as JavaScript inside this browser tab. Your PNG files are read with the standard File API, embedded, and written back out as a Blob your browser hands to the download.
There is no upload request to inspect, because there is no endpoint that would accept one. Open developer tools, switch to the Network tab, and build a PDF — nothing carrying your images appears. The Content-Security-Policy this site sends also restricts connections to our own origin, and your browser enforces that regardless of what our code does.
Frequently asked questions
Can I combine many PNG files into one PDF?
Yes, and there is no limit on how many. Each image becomes one page, in the order shown in the list, which you can rearrange before creating the file.
Will the screenshot text stay sharp?
Yes. PNG data is embedded losslessly, so in "fit to image" mode the pixels in the PDF are identical to the pixels in your file. Choosing A4 may scale a large image down, which softens it slightly.
What happens to a transparent PNG background?
PDF pages have no transparent canvas, so the area shows whatever the reader draws behind the page — usually white. Flatten the image onto a white background first if you need to be certain.
Why is my PDF as large as all the images added together?
Because PNG is embedded without re-compression, which is what keeps it lossless. If you need a smaller file, convert the images to JPG first and accept a small quality cost.
Is anything uploaded to a server?
No. The document is built inside your browser tab and never leaves your device. You can confirm it in the DevTools Network tab while you create the file.