One file per page
Splitting produces a separate single-page PDF for every page in your document, packaged into a zip.
The zip matters more than it seems. A ninety-page document produces ninety files, and ninety browser download prompts would be unusable. The archive is assembled locally too — it is not built on a server and sent back to you.
Split or extract?
They answer different questions.
- Split gives you many files, one per page. Right when each page needs to go somewhere different — separate invoices, individual certificates, pages to be filed separately.
- Extract gives you one file containing the pages you chose. Right when you want a shorter document.
If you want pages 5 to 9 as a single document, extract. If you want them as five documents, split.
Splitting part of a document
You do not have to split everything. Give a page range and only those pages are separated out; the rest of the document is ignored.
What happens to the pages
Each is copied into its own new document as it is, with no re-compression. Images are not re-encoded and text is not rasterised, so quality is untouched.
One consequence to expect: the individual files often total more than the original. A PDF shares resources such as embedded font subsets across all its pages. Once every page is its own document, each one needs its own copy of the fonts it uses.
Nothing is transmitted
The document is read into memory in your browser, the pages are separated there, and the zip is built there. The Uploaded readout beside the result measures this page’s own outbound network calls and reads 0 B on success.