PNG to PDF
Turn screenshots, diagrams and transparent graphics into a PDF, pixel for pixel.
or drop files anywhere on this page
Your files stay in this browser. Nothing is uploaded.
About PNG to PDF
PNG to PDF puts screenshots, diagrams, scanned forms and logos onto PDF pages without touching a single pixel. The picture is read in this browser tab, placed on a page of the size you pick, and saved as a PDF on your device. Add one PNG or fifty; they can share one document or get one each.
PNG is the format screenshots and design exports usually arrive in, because it keeps sharp edges and flat colour exactly. That is also what the PDF keeps: small print in a screenshot stays as readable as it was on screen, and a logo with a see-through background stays see-through.
How it works
- Choose your PNG files, or drop them anywhere on the page. JPG, WebP, GIF and BMP images can go in the same batch.
- Put the pictures in order by dragging their thumbnails, or with the Move button on each one. Each one becomes one page.
- Pick a page size. A4 is selected to begin with; Fit to image makes every page exactly as big as its picture.
- Keep "Merge into one document" ticked for a single PDF, or clear it to get one PDF per picture in a ZIP.
- Convert, then download the PDF. Nothing leaves your device at any step.
What happens to a PNG on the way into the PDF
A PDF cannot hold a PNG file as it stands, so the tool unpacks the picture and stores the same pixels again with the lossless compression PDFs use. Nothing is rounded off or smoothed. The file size can move either way, because the two compressors are good at different pictures:
- A Retina screenshot of a web page, 2880 by 1800 pixels and 668 KB as a PNG, became a 536 KB PDF.
- A 4032 by 3024 landscape picture, 5.6 MB as a PNG, became a 7.3 MB PDF. Photographs are the case where a PNG was the wrong format to begin with.
- A 1024 by 187 logo on a transparent background went from 21.9 KB to 21.8 KB, and kept its transparency.
Screenshots on a page: size and sharpness
With the default A4 page and Auto orientation, a screenshot that is wider than it is tall gets a landscape page. The 2880 by 1800 screenshot above filled the width of landscape A4 at about 246 pixels per inch, which prints cleanly.
Fit to image counts one pixel as one point, so the same screenshot becomes a page 40 by 25 inches. That is fine for reading on screen, where the viewer scales it down, but a printer will shrink it to fit the paper. For something you will print, keep A4 or Letter.
A small PNG, such as an icon or a cropped button, is enlarged to fill the page and will look soft or blocky. Fit to image keeps it at its own size instead.
Transparency, and making the PDF smaller
Transparent parts of a PNG stay transparent inside the PDF, so the page shows through them. On screen and on paper that page is white, so a logo with a clear background sits cleanly on it with no grey box behind it.
If the PDF is too large to send, run it through Compress PDF afterwards. Compress re-saves pictures as JPEG, which suits photographs but can put faint smudges around small text. On the screenshot PDF above, Good quality at 144 ppi brought 536 KB down to 116 KB with the text still easy to read.
Frequently asked questions
No. The pixels are stored again with lossless compression, so every one comes through unchanged. If the result looks soft, the picture was enlarged to fill a page bigger than it is; choose Fit to image, or a smaller page size, to avoid that.
Yes. The transparency travels into the PDF as a mask, so the page shows through the clear areas. In practice that means the logo or cut-out sits on white, without a grey or black box around it.
The PDF stores the pixels with its own lossless compression rather than keeping the PNG file. A screenshot of 668 KB came out at 536 KB, while a 5.6 MB photograph grew to 7.3 MB. Nothing is lost in either direction.
A4 or Letter with Auto orientation, if it might be printed: a wide screenshot gets a landscape page and fills its width. Fit to image makes the page the size of the screenshot in points, which is very large for a Retina capture.
Yes. Add them all, drag the thumbnails into order, and keep "Merge into one document" ticked. Each picture gets a page of its own, in the order shown.
Yes. JPG files go in exactly as they are, and WebP, GIF and BMP files are stored the same lossless way as PNG. Every picture still gets its own page.
Open the finished PDF in Compress PDF. It re-saves the pictures as JPEG at the quality and resolution you choose; a 536 KB screenshot PDF came down to 116 KB at Good and 144 ppi. Check small text afterwards, since JPEG can blur it slightly.
No. Screenshots often show private things, which is a good reason to keep them local: the pictures are read and placed on pages by code running in this tab, and the PDF is built in your device’s memory.
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