How to convert PNG to PDF
- Tap Choose your PNGs and pick the images, in the order you want the pages.
- Tap Make PDF.
- Open the result and check the smallest text before you send it on.
Why a screenshot in a PDF often looks wrong
Most converters store every page as a JPEG, because for photographs that is the right answer and it is one code path. JPEG works by discarding fine differences between neighbouring pixels, which is generous to skin and cruel to letters: a screenshot of an email arrives with a grey halo around every character and a shimmer along every table rule.
This page encodes each page both ways — as a photograph and losslessly — and keeps whichever came out smaller. Flat colour and hard edges compress extremely well losslessly, so for a screenshot the sharp version is usually also the smaller one, and you get both at once rather than choosing.
Transparency becomes white
PNG can record that a pixel is see-through. A PDF page has nothing behind it to show through to, so anything transparent is painted onto white before the page is built. That is right for the overwhelming majority of PNGs — logos, cut-outs, screenshots with rounded corners — and it is stated here rather than discovered later, because the alternative default is black.