Twenty screenshots of an app walkthrough. Each one a separate PNG. The product team wants one document they can scroll through end-to-end.
PNGs combine into a PDF the same way JPGs do — but PNG handles transparency and stays sharper for screenshots and diagrams.
Why PNG over JPG for this
JPGs are great for photographs. PNGs are great for screenshots, UI captures, diagrams, and anything with text or sharp lines. PNG keeps text crisp; JPG smears it slightly.
If your source is screenshots, PNG is the right format. Combining PNGs into a PDF preserves that sharpness.
Order and convert
Name your PNGs with a numeric prefix (`01_login.png`, `02_dashboard.png`) so they sort naturally. Drop the lot into Flint's image-to-PDF tool and they combine in order.
Reorder by dragging if needed. Each PNG becomes one PDF page.
Keep file size reasonable
PNG files are bigger than JPG for the same image. A walkthrough of 30 screenshots can easily make a 50 MB PDF.
Compress the result — Flint's compressor handles PNG-derived PDFs well, often cutting size 60-70% without visible loss. For screenshots especially, the difference is invisible.
FAQ
Will PNG transparency be preserved in the PDF?
Yes. PDF pages can have a transparent background where the PNG was transparent. Useful for layered diagrams.
What's the max number of PNGs I can combine?
Browser-dependent. Hundreds is fine on a modern machine. For very large sets, do it in batches and merge the batches.
Can I add captions to each screenshot page?
After combining, open the PDF in the editor and add a text box on each page. Useful for annotated walkthroughs.
Why is my combined PDF so large?
PNG is lossless, so file sizes add up. Compress the final PDF for sending; the originals stay untouched if you keep them.
Screenshots and diagrams deserve a PDF that keeps them sharp. Combine your PNGs in Flint's image-to-PDF tool without quality loss.