Where JPG is stronger and where PNG is stronger
JPG is usually the natural choice for photos, phone camera captures, photographed pages, receipts, and real-world visual material. It fits photography-oriented workflows very well.
PNG is usually stronger for screenshots, interface captures, diagrams, product visuals, charts, and images where sharp text and clean lines matter more than camera-style capture.
That means the right choice depends first on the nature of the source material. Real-world photos tend to lean toward JPG. Digital interface and documentation visuals often lean toward PNG.
How that choice affects the final PDF
When images become part of a PDF, the readability of the source matters. Photo-based packets often work well from JPG. Interface-heavy or text-heavy visuals often benefit from PNG as the cleaner source.
A PDF built from screenshots, charts, or tiny interface labels may feel easier to read if those images began as PNG rather than a more photo-oriented format.
So JPG vs PNG in a PDF workflow is not just a file extension debate. It is a question about choosing the source that best preserves the kind of information your final reader needs to consume.
How to choose for your own workflow
If your materials mostly come from a phone camera, photographed paperwork, receipts, or real-world scenes, JPG is usually perfectly practical. It is familiar, efficient, and naturally suited to those sources.
If your materials are screenshots, design review images, interface walkthroughs, QA evidence, or diagram-like visuals, PNG is often the more appropriate source before bundling into PDF.
In the end, JPG vs PNG is less about one universal winner and more about matching the format to the content. Both can work very well in PDF workflows when they are used in the right scenario.