No. The resizing runs entirely in your browser using a local PDF engine — your file never leaves your device and nothing is stored on a server.

No. Each page is scaled to fit the A4 (or US Letter) size while keeping its exact proportions, then centered — so nothing is cropped or distorted. You can add a small or normal margin, or none at all.

Yes. On the default “Auto” setting each page keeps its own orientation; you can also force every page to portrait or landscape.

Mixed or unusual page sizes often print with odd scaling or clipped edges. Normalizing every page to a standard A4 (or US Letter) size makes the document print cleanly and consistently.