JPG, PNG or PDF: which format for scanned documents?
Every scan ends with the same question: which format do I save it in? The honest answer is that each of the three common choices is best at something specific, and picking well takes about ten seconds once you know the trade-offs.
JPG: small and everywhere
JPG compresses aggressively, so a scanned page is typically a few hundred kilobytes. For text documents at reasonable quality settings the compression artifacts are invisible in practice. Use JPG when file size matters — email attachments, uploads with size limits, archives of hundreds of receipts. Its one real weakness: recompressing it repeatedly (edit, save, edit, save) slowly degrades the text edges.
PNG: exact but heavy
PNG is lossless: what the scanner produced is exactly what the file holds, at the cost of files several times larger than JPG. Choose PNG when the scan will be edited again, when fine detail matters (small print, technical drawings, stamps and seals), or when a single page needs to look perfect on screen.
PDF: the format for sending
PDF is not an image format but a container — which is exactly why it wins for anything multi-page or anything official. Page order is fixed, printing is predictable, and recipients expect it. The pattern that serves most people: PNG or JPG for single pages you keep, PDF for anything you send or anything longer than one page. Scandut saves all three, so the choice costs one click either way.