Before splitting a PDF, decide whether you need every page as a file, several page ranges, or smaller parts for an upload limit.
Three Common Split Modes
| Mode | Example | Best for |
|---|---|---|
| Every page | Export pages 1, 2, 3 separately | Submitting scanned pages one by one |
| Page ranges | 1-3, 4-8, 9-12 | Splitting by chapters or attachments |
| By size target | Keep each part below a limit | 5MB or 10MB upload limits |
Exact automatic size-based splitting is hard because scanned pages, photos, and text pages vary widely. A practical workflow is to split by ranges, then check each output file size.
How to Write Page Ranges
A common syntax is 1-3,5,8-10, which means pages 1 through 3, page 5, and pages 8 through 10. Check whether PDF page numbers match the reader display before exporting.