High-Quality PNG to PDF Converter
Turn your crisp PNG files into a shareable PDF document. Since it happens in your browser, your sensitive documents never upload to a server.
Last updated: August 2026
Drop your images here or click to select
Supports JPG, PNG, WebP and AVIF
Two things happen to a PNG on its way into a PDF here, and both are worth knowing before you convert something that matters. The image is embedded at its full pixel resolution — nothing is scaled down — but it is encoded as JPEG at 95 percent quality rather than carried through losslessly. So "high quality" in this context means full resolution and a high quality setting, not a byte-for-byte copy of your PNG.
For most content that distinction is academic. Photographs, screenshots of photographs, and anything with soft gradients survive 95 percent JPEG with no visible change at normal viewing or printing sizes. But PNG is the format people reach for precisely when their image is not photographic — diagrams, line art, logos, UI screenshots, anything with sharp edges and flat colour. That is the content JPEG handles worst, and where a small amount of ringing can appear around hard edges and lettering.
The second change is transparency: PNG supports an alpha channel and JPEG does not, so transparent areas are filled with white before encoding. That is almost always what you want in a document — a PDF page is white anyway — but it means a logo with a transparent background comes out on a white rectangle rather than on the page itself. If the surrounding page is not white, that rectangle shows.
How to convert PNG files to a PDF
- 1
Add your PNGs
Drop one or many. Each becomes a page, and the conversion runs in your browser — nothing is uploaded, which is the point for scanned documents and unreleased design work.
- 2
Arrange the pages
Drag the thumbnails into order. The document follows that sequence rather than the filenames, so a set of exported screens still needs arranging into reading order.
- 3
Use Fit with no margin for sharp graphics
Fit makes each page exactly the dimensions of its image, so the PNG is placed at native size rather than scaled to paper. That maximises the pixels behind every line and is the setting that keeps diagrams and screenshots crispest.
- 4
Choose A4 or Letter for printing
When the document will be printed or filed, a standard page size is the right call even though it scales the image. Add margins if the pages will be handled or punched.
Pro tip: When the PNG is text-heavy — a diagram, a UI capture, a chart with labels — start from the largest version you have and use Fit with no margin. The JPEG encoding applies to whatever pixels you supply, so more pixels behind each letter means artefacts land at a scale nobody sees. A screenshot taken on a high-density display already has this advantage built in, which is why a Retina capture converts noticeably better than one taken on a standard screen.
Troubleshooting: If lettering in a diagram looks slightly haloed, that is the JPEG encoding meeting hard edges — convert from a larger source and use Fit rather than scaling to A4. If a transparent logo appears on a white block, that is the alpha channel being flattened, which is unavoidable in this format; place it on the page background colour yourself before converting. If the file is very large, PNG sources are often high-resolution screenshots, and Compress PNG to 50KB before converting is more effective than shrinking the document afterwards. If pages are out of order, arrange the thumbnails first.
If lossless really matters — an archival scan, a legal exhibit — a PDF built this way is not the route, and keeping the PNG itself is. For photographic sources, Convert JPG to PDF Online covers the same workflow with less at stake. For mixed sets, Combine Images into One PDF. If you would rather keep the image as an image, Convert PNG to JPG does the format change without the document wrapper, and the full Image to PDF tool has every option.
Frequently asked questions
How do I convert PNG to PDF?
Add your PNG files to the tool above, drag them into the order you want, choose a page size, and download. Each image becomes one page of a single PDF, assembled in your browser with nothing uploaded.
Does converting PNG to PDF lose quality?
Some. The image is embedded at full resolution but encoded as JPEG at 95 percent rather than carried through losslessly. For photographs the difference is invisible. For diagrams, line art and screenshots — the content PNG is usually chosen for — a small amount of ringing can appear around sharp edges.
What happens to transparency in a PNG to PDF conversion?
Transparent areas are filled with white before encoding, because the format used inside the PDF has no alpha channel. On a white page that is invisible and exactly what you want. On any other background, a transparent logo will show as a white rectangle around it.
How do I keep PNG screenshots sharp in a PDF?
Use Fit as the page size with no margin, and start from the largest capture you have. Fit places the image at its native dimensions instead of scaling it to paper, so every line keeps the maximum number of pixels behind it — which is what keeps encoding artefacts too small to notice.
Are my PNG files uploaded to a server?
No. The PDF is generated locally in your browser, so scanned documents, design exports and screenshots are never uploaded, stored, or logged. Once the page has loaded the tool works with your connection switched off.
Looking for the full-featured version? Open the main Image to PDF tool.
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