How to Split a Large PDF Into Separate Files
Short answer
Open the PDF, press Ctrl+P or Cmd+P, set the page range to the pages you want, and choose Microsoft Print to PDF or Save as PDF as the destination. Repeat per section. This needs no extra software, though it drops bookmarks and form fields — macOS Preview's thumbnail drag preserves those.
On this page
Splitting a PDF has an obvious free method that most people never find, because it is hidden behind a button labelled Print.
The reason it works is that “print to PDF” is a renderer, not a printer. It takes whatever the print dialog is set to produce — including a page range — and writes it to a file instead of to paper. Set the range to pages 1 to 20 and you get a PDF of pages 1 to 20.
Before you split: check whether you need to
Most people land here because something is too big to send. Splitting is a reasonable answer to that, but it is rarely the best one.
| Situation | Better approach |
|---|---|
| 40MB of scanned pages | Compress first — scans typically shrink 80–95% |
| 15MB with print-resolution images | Re-export from the source at screen quality |
| Genuinely 300 pages of content | Split by section, as below |
| Recipient only needs chapter 3 | Extract that chapter only |
A scanned document that is too large is a compression problem wearing a splitting costume. The arithmetic in why a PDF is so large sorts this out in thirty seconds: divide the size by the page count. Above 1MB per page, our PDF compressor will almost certainly get the whole document under the limit intact, and the recipient would much rather have one file than four.
Split when the document genuinely contains separable sections, or when compression has already been tried and the result is still too big — the situation covered in a PDF that is still too large after compressing.
The print method — Windows and macOS
- Open the PDF in any viewer, including your browser.
- Press Ctrl+P (Windows) or Cmd+P (macOS).
- Set the page range. Most dialogs accept
1-20, and many accept1-5, 12, 18-20for non-contiguous selections. - Choose the output:
- Windows: printer dropdown → Microsoft Print to PDF.
- macOS: PDF dropdown at the bottom left → Save as PDF.
- Name the file something that says what it contains, then repeat for the next range.
Set the scale to 100% or Actual size before printing, not Fit to page. Fit-to-page adds a margin on every pass, so a document split and later recombined ends up with a visibly shrinking border. This is the same mechanism behind most of PDF printing problems.
What the print method loses: bookmarks, clickable links, form fields, attachments, and any OCR text layer. For a scanned report it loses nothing you care about. For an interactive form it loses the form.
macOS Preview — the better method on a Mac
Preview can extract pages without re-rendering them, which preserves more and avoids any image re-encoding.
- Open the PDF and show the thumbnail sidebar (View → Thumbnails).
- Select the pages you want — click the first, shift-click the last.
- Drag the selection out of the window onto the desktop.
That creates a new PDF containing exactly those pages, with the original page objects copied rather than redrawn. You can also drag a single page out to get a one-page file, which is the fastest way to extract a signature page or a certificate.
To split a document in half and keep both parts, do it twice. Preview does not remove the dragged pages from the original unless you delete them explicitly.
Windows without extra software
Windows has no Preview equivalent, so the print method is the built-in route. Two workarounds are worth knowing.
Delete rather than extract. Open the PDF in Edge or Word, remove the pages you do not want, and save the result under a new name. Word will reflow things and is only suitable for simple documents; Edge’s page management is limited but sufficient for straightforward deletions.
Use the source. If the PDF came from a Word document, splitting the Word file and exporting twice produces far better results than splitting the PDF — bookmarks, links and heading structure all survive.
When a dedicated tool earns its place
Three cases where the manual methods stop being sensible:
- Splitting into many files. One file per page across 200 pages is not a job for the print dialog.
- Splitting on a rule. Every 10 pages, or at each page containing a particular phrase.
- Preserving everything. Bookmarks, form fields, tagged structure for accessibility, and an OCR text layer all surviving the split.
Acrobat Pro does all three. So do several command-line utilities, if you are comfortable with one.
A word on web-based splitters: they work by uploading the document. For a public report that is fine. For a contract, a medical record, a bank statement or anything carrying a signature, it means handing a complete copy to a third party, and the page you most want to extract is usually the one you least want to upload.
Naming and reassembly
Splitting creates a problem at the other end: the recipient now has five files and no obvious order.
Number the prefix, not the suffix, and pad the numbers:
01-introduction.pdf, 02-accounts.pdf, 03-appendix.pdf. Files sort
correctly and the order is self-evident. A set named report-part1,
report-part2, report-part10 will sort 1, 10, 2 in most file browsers.
If someone needs to put them back together, recombining is easier than splitting: drag the files into Preview’s thumbnail sidebar on macOS, or use any merge tool on Windows. The method in combining photos into one PDF handles the phone case.
What to expect
A two-way split of a normal document takes under two minutes with the print method and produces files that open correctly everywhere.
The limit worth knowing: splitting does not divide the file size evenly. A 40MB document where pages 12 to 15 are full-colour scans will produce one large piece and several tiny ones, because the size lives in those four pages wherever they end up. If the aim is to get every piece under a limit, check the resulting sizes rather than assuming the split did it.