Split odd/even pages
Pull the odd or even pages (1-based) into their own PDF.
Runs on your device. The file is never uploaded.
Split odd/even pages divides one PDF into an odd-numbered file and an even-numbered file, named with -odd and -even suffixes. Keep either half or both; both builds the two documents in a single run. Pages hold their original order inside each half. A one-page document has no even half, so asking for it stops the run.
Questions
What is odd and even here?
1-based page numbers as printed: odd is pages 1, 3, 5; even is 2, 4, 6. Not the zero-based index the file uses internally.
What is this for?
Mostly single-sided scanning. Scan all the fronts, scan all the backs, and this separates or pairs the halves, and "both" gives you the two documents in one run, named -odd and -even.
What if the document has only one page?
You get the odd file. Asking for even pages of a one-page document fails with "document has no even pages" rather than handing you an empty PDF.