Wraps a PNG in a PDF, losslessly. PDF supports the same Flate compression PNG uses, so the pixels go in exactly as they are — nothing is decoded, re-encoded or approximated.
Screenshots are the common case
For a screenshot, choose page exactly the size of the image. A screenshot on an A4 page with margins looks like a mistake, and shrinking it to fit makes the text harder to read than it was.
Transparency
That is almost always right. Where it is not — a logo meant to sit on a coloured background — flatten it onto the colour you want first, using the PNG to JPG tool with a background colour set.
Lossless in, lossless out
The consequence is that a PDF from a large PNG is a large PDF. If size matters more than fidelity, convert the PNG to JPEG first and use the JPG to PDF page.
Other names for this
Also searched as “screenshot to pdf”, “convert png to pdf”, “image to pdf”.
Questions
- Is the image re-compressed?
- No. PDF supports the same lossless compression PNG uses, so the pixels are embedded exactly.
- What happens to transparent areas?
- They render against white, which is what PDF viewers and printers assume. Flatten onto a colour first if you need something else.
- The PDF is very large.
- Lossless embedding means a large PNG makes a large PDF. Convert to JPEG first if size matters more than fidelity.
- Best settings for a screenshot?
- Page exactly the size of the image. A screenshot centred on an A4 page with margins looks like a mistake and is harder to read.
- Is my file uploaded?
- No. The PDF is built in this tab and handed to you as a download. That matters here more than most places: the documents people convert to PDF are contracts, CVs, medical letters and manuscripts.
- Can I convert several files at once?
- Yes. Drop as many as you like, or a whole folder. Each becomes its own PDF keeping its original name.