KatterPrint accepts:
- PDF — the safest format, because the layout is already fixed.
- Word documents (DOC, DOCX).
- Images (PNG, JPG).
Anything else — spreadsheets, archives, slides exported oddly — should be saved as a PDF before uploading. That also guarantees the layout you see in the preview is the layout that prints.
Very large files take longer to upload and render. If a document is mostly high-resolution images, exporting it at print resolution rather than camera resolution makes the whole job faster.