Convert PNG to PDF Online Free

Need to turn an image into a PDF document? AllConvert converts PNG to PDF instantly, right in your browser. No file upload, no account, no watermarks.

Why convert PNG to PDF?

PDF is the universal format for documents: it prints predictably, opens on every device, and is accepted by virtually every upload form, application portal and email recipient. Converting a PNG to PDF is the quickest way to submit a scanned form, attach a screenshot to an application, or turn an image into something that behaves like a document rather than a picture.

What happens during the conversion?

AllConvert places your PNG onto a PDF page sized to match the image, so nothing is cropped or stretched and the full resolution of your image is preserved. The output is a standard PDF that opens in any reader — Adobe Acrobat, browser viewers, phones and tablets alike.

Sharp text and screenshots stay sharp

Because PNG is a lossless format, screenshots, scanned documents and images with text convert to PDF without any quality loss. If you are starting from a photo and file size matters more than pixel-perfect detail, you can also convert JPG to PDF for a smaller result.

How to convert

1. Drop your PNG into the converter box above, or click it to pick a file from your device.
2. The PDF is built straight away on your device — there's no upload step at all.
3. Click the download button that appears to save your PDF.

Conversion happens directly in your browser tab; nothing is uploaded, and it behaves the same on phone or desktop.

Why a PNG-based PDF is bigger than a JPG-based one

Turning an image into a PDF doesn't recompress the picture — AllConvert embeds the PNG's existing pixel data into a PDF page object more or less as-is, which is why quality doesn't change either direction. But that also means the PDF inherits PNG's file size. PNG uses lossless DEFLATE compression, the same algorithm behind ZIP files, and a photograph compresses far worse under DEFLATE than under JPEG's lossy encoding. So a PNG-based PDF of a photo can end up several times larger than a JPG-based PDF of the same image, even though neither loses any further quality in the process.

Frequently asked questions

How do I turn a PNG into a PDF?
Drop your PNG into the converter on this page and it converts to PDF automatically. The image lands on a PDF page sized to match it, and the file stays on your device the whole time.

Will the PDF lose image quality?
No. PNG is lossless already, and AllConvert embeds it into the PDF without recompressing, so the page looks identical to your source image.

Can I convert a screenshot to PDF for free?
Yes — no watermark, no signup, no upload. The whole conversion runs locally in your browser.