Often you don't need the whole stack, just a slice of it: sending a counterparty three pages of a contract instead of thirty, pulling one section out of a report, or breaking a heavy scan into chunks that fit through an upload form. Splitting a PDF is exactly that. The one thing to get right is the ranges, so the page order stays intact.
Which option fits
- **You need several separate files** (say, each report section on its own) — that is splitting by range.
- **You need only specific pages** in one file — extracting with **extract-pages** is faster.
- **You want to drop a couple of pages and keep the rest whole** — that is **remove-pages**, not splitting.
How to split a PDF, step by step
1. Open split-pdf and upload the document. 2. Look at the preview and find the boundaries: where one block ends and the next begins. 3. Set the page ranges — for example, 1–5, 6–12, 13–20. 4. Run it and download the archive of finished files. 5. Open each file and confirm the pages landed in the right parts, in the right order.
A real-world example
Someone had a 40-page scanned grant application that the portal would only accept in three separate sections: forms, budget, and appendices. Using **split-pdf**, they set ranges 1–12, 13–24, and 25–40, downloaded the three files, and uploaded each into its own slot. The preview made the boundaries obvious, so nothing landed in the wrong section.
What can go wrong
- **A page ended up in the wrong file.** Usually it's an off-by-one: the number printed on the page and its position in the PDF don't always match (cover sheets, blank inserts). Trust the preview, not the printed numbering.
- **You got too many tiny files.** The ranges were too granular. Merge the extras back with **merge-pdf**.
- **The parts are still heavy.** Scans stay large even after cutting. Run each part through **compress-pdf**.
- **The order scrambles when you reassemble.** If you later stitch files back together, watch the names — alphabetical sorting can put "part 10" before "part 2".
A common mistake
The common mistake is splitting by the page numbers printed in the document rather than by the PDF's actual page positions. A cover page or a blank insert shifts everything by one, and suddenly the contract's signature page lands in the wrong file. Use the on-screen preview to set boundaries.
What to check before sending
- Each file holds exactly the pages the recipient needs.
- The page order didn't shift.
- Each part fits the form or email size limit.
To break a document into the parts you need, upload it to **split-pdf** and set the ranges. If you only need a few pages, **extract-pages** is quicker, and **merge-pdf** puts files back together.