Convert PNG to PDF
Turn screenshots, scans and diagrams into a single PDF document, sized for A4 or Letter.
Drop your PNG files here
or click to browse · paste with Ctrl+V · files never leave your device
Nothing queued yet. Add as many files as you like — everything runs on your own device.
Nothing is uploaded
Conversion runs in your browser. Your files never touch a server, so there is no copy of them to leak.
No sign-up, no watermark
No account, no email, no daily limit, and nothing stamped across your image.
Batch and folders
Drop a hundred files at once and download the results as a single ZIP.
Works offline
Once this page has loaded you can disconnect entirely and it still works.
PNG is what screenshot tools and many scanners produce, and PDF is what the people receiving them want. Assembling several PNGs into one document usually means fighting a word processor; this page does it directly, in your browser, with one image per page and no upload.
The options are the ones that matter for submission: A4, US Letter, Legal, A3 or A5 with a margin, portrait or landscape or automatic, and a merge toggle that decides whether you get one document or several.
One thing to know about PNG specifically: transparency does not survive. Images are stored inside the PDF as JPEG, so any transparent area is flattened onto the background colour you choose — white by default, which is almost always right for a page that will be printed.
How to convert PNG to PDF
- Add your PNG files. Drag them onto the box above, click to browse, or paste an image straight from your clipboard. You can add as many at once as you like.
- Adjust the settings if you need to. The defaults suit most images. PDF is lossless, so there is no quality setting to adjust. Pick a background colour if your image has transparent areas.
- Download the PDF file. Each file gets its own download button as soon as it finishes, and you can pull the whole batch down as a single ZIP.
What changes when you convert PNG to PDF
Every format conversion involves trade-offs, and vague tools hide them. Here is exactly what happens to your image in this particular conversion.
- PDF has no transparency channel, so any transparent areas are filled with a solid colour. White is used by default and you can pick a different colour before converting — this is the single most common surprise when going from PNG to PDF.
- The result is a document rather than an image. Choose "Fit to image" to size each page to its picture with no border, or pick A4, US Letter, Legal, A3 or A5 with a margin — which is what most application forms and print shops expect. Portrait and landscape can be forced, or left on Auto to follow each image.
Keeping screenshots legible
PNG screenshots usually contain text, and text is exactly what JPEG compression handles worst. At the default quality it is perfectly readable, but if the screenshot contains small type — a terminal, a spreadsheet, dense UI — push the quality slider up before converting. The file grows, and the text stays crisp.
The other half of legibility is size on the page. A wide screenshot placed on a portrait A4 page is scaled down to fit the width, which can render small text unreadable in print. Choosing landscape, or cropping the screenshot to just the part that matters before converting, generally works far better than fighting the quality setting.
What happens to the file size
Measured, not estimated: two 1200 x 800 pixels references — a photograph and a flat-colour graphic — put through this converter.
| Reference image | As PNG | As PDF | Change |
|---|---|---|---|
| Photograph | 1.67 MB | 280 KB | -84% |
| Graphic with text | 40 KB | 27 KB | -32% |
Yours will differ: size depends more on what is in the picture than on the formats involved.
About PNG (Portable Network Graphics)
PNG is the lossless format of choice for screenshots, logos and any image that needs a transparent background.
Where you probably got it: Screenshots, logos, design exports, and graphics with transparency.
Strengths
- Completely lossless — pixels survive unlimited re-saves untouched
- Full 8-bit alpha transparency, including soft edges and drop shadows
- Perfect for text, screenshots, line art and flat colour
Limitations
- Much larger than JPG or WebP for photographs
- No animation (APNG exists but is patchily supported)
- No quality dial — you cannot trade detail for size
About PDF (Portable Document Format)
PDF is a page-based document format that renders identically everywhere, which is why forms and print shops demand it.
Support: Universal. Every device on earth can open a PDF.
Strengths
- Looks the same on every device, operating system and printer
- Combines many images into one tidy, ordered document
- The format almost every official form, application and print shop asks for
Limitations
- A document, not an image — you cannot edit the pixels afterwards
- Cannot be used as an image on a web page
- Transparency is flattened onto a white page
Is it safe to convert PNG online?
Here, yes — and you can check rather than trust. Open your browser’s developer tools, switch to the Network tab and convert a PNG file: no request carrying your image is made. Disconnect from the internet after this page has loaded and the converter still works, which would be impossible if a server were doing the conversion.
That is worth verifying wherever you convert, because most online converters do upload, and PNG files are so often screenshots of statements, invoices and internal dashboards, which people rarely think of as sensitive until they are on a stranger’s server. Once a file is on somebody else’s server you are relying on a privacy policy rather than on anything you can observe. We wrote up how to tell a safe converter from a risky one in more detail.
Frequently asked questions
Does PNG to PDF keep transparency?
No. Images are placed into the PDF as JPEG data, which has no transparency, so transparent areas are filled with the background colour — white unless you pick another. For a document that will be printed on white paper this is exactly what you want anyway.
Can I combine several screenshots into one PDF?
Yes. Drop them all in, use the arrows beside each file to set the order, and leave the merge option ticked. You get a single PDF with one screenshot per page.
How do I convert PNG to PDF?
Drag your PNG file onto the box above, or click it to browse. The conversion starts immediately in your browser and the PDF download appears within a second or two for most images. You can drop in a whole folder of files at once and download them together as a ZIP.
Are my PNG files uploaded to a server?
No. The conversion happens locally in your browser, so your files are never transmitted anywhere — the tool even works with the network disconnected once the page has loaded. That is also why there is no file size or file count limit: nothing costs us anything per conversion. The practical ceiling is your own device's memory, which on a phone means very large images may fail.
Will converting PNG to PDF reduce the quality?
A little. A PDF page is lossless in itself, but the picture placed on it is stored as JPEG, so it is compressed once on the way in. The quality slider controls that, and the default of 90 is high enough that the difference is invisible in print. Raise it if the image contains small text you need to stay crisp.
What is the difference between PNG and PDF?
PNG is the lossless format of choice for screenshots, logos and any image that needs a transparent background. PDF is a page-based document format that renders identically everywhere, which is why forms and print shops demand it. In practice the choice comes down to compatibility: universal across browsers, operating systems and design software. Meanwhile universal. Every device on earth can open a PDF.