How to split a PDF into separate files

Decide which of the three jobs you have

Almost every failed attempt at this starts by picking the wrong operation, so it is worth thirty seconds.

• Split gives you one file per page. Twelve pages in, twelve PDFs out, usually zipped. Right when each page has a different destination: one invoice per supplier, one certificate per person.
• Extract gathers the pages you picked into a single new PDF. Right when a fifty-page report contains a five-page appendix that needs to go to one team.
• Delete is extract inverted. Right when you want almost all of it, because ticking two pages to remove beats ticking forty-eight to keep.

Splitting a PDF, step by step

1. Drop the PDF onto the page. Every page is rendered as a numbered thumbnail, so you are choosing by sight rather than guessing at page ranges.
2. Tick the pages you want. Click them one at a time, or shift-click to take a run.
3. Choose the action. Extract for one combined file, Split for one file per page.
4. Download. More than one file arrives as a zip. Your original is never modified.

There is no page cap, no file-size cap and no watermark, because the work happens on your machine rather than on a server that has to be paid for. The practical ceiling is your own memory, which on a laptop means a very large document indeed.

Why not just print to PDF?

Printing pages 4 to 9 to a PDF is the trick most people reach for, and it quietly destroys the document. Printing re-renders every page as an image, so the text layer is gone. The result cannot be searched, cannot be copied from, cannot be read by a screen reader, and is often several times larger than the pages it came from. It also flattens any form fields into pictures of form fields.

Extracting copies the page objects instead. Text stays text, and the file stays a fraction of the size.

Doing it without Acrobat

Acrobat Pro does this well and costs a subscription. The free alternatives are worth knowing:

• In the browser. The tool above uses pdf-lib running in the page. No install, no account, no upload.
• macOS Preview. Open the PDF, show the thumbnail sidebar, then drag a page out onto the desktop to get a one-page PDF. Fine for one page, tedious for twenty.
• Command line. qpdf --pages input.pdf 4-9 -- out.pdf if you have qpdf installed. Excellent for scripting, unnecessary for one file.

Watch out for these

Password-protected files

An encrypted PDF cannot be read until it is unlocked, and no split tool can work around that. Open it with the password, save an unprotected copy, then split the copy.

Form fields and annotations

Page content, images and text copy across faithfully. Interactive extras such as form fields, bookmarks and some annotations belong to the document rather than to an individual page, so they do not always survive. If a filled form has to keep working after the split, check the result before sending it.

Very large scans

A 400-page scan at 600 DPI is a lot of pixels to render as thumbnails. It will work, it will just take a moment on a phone. If the file is unwieldy, compressing it first makes everything downstream faster.

Questions