What the PDF splitter does
Split PDF takes one document and breaks it into several smaller files. Two modes are offered: one page per file, which turns a 12-page document into 12 single-page PDFs, and split in half, which produces two files with the first and second halves. Each output is a complete, standalone PDF with the original page content copied exactly — nothing is re-rendered, so text remains searchable and images keep their resolution. The whole process runs in your browser; no file leaves your device.
Choosing a mode
| Mode | Output | Best for |
|---|---|---|
| One page per file | N files, each one page | Scanned batches, certificates, invoices stored one-per-file, feeding pages into other tools |
| Split in half | 2 files | Long documents that exceed an upload size limit, double-sided scan batches, sharing part of a report |
For any other arrangement — a specific page range, or several ranges — use the Extract Pages tool, which accepts input like 1-3, 7, 10-12 and produces one file containing just those pages. Run it more than once for multiple ranges.
How it works under the hood
A PDF is a container of page objects, each referencing its own content stream, fonts and images. Splitting creates a new empty document for each output and copies the required page objects into it, along with every resource those pages reference. Resources shared between pages (a font used on every page, a company logo) are duplicated into each output file, which is why the combined size of the pieces is often larger than the original. For a text-heavy document with one embedded font this overhead is a few tens of kilobytes per file.
Common uses
- Scanner output — a batch of separate letters scanned into one file becomes individual documents ready to file.
- Upload limits — a portal that caps files at 10 MB accepts two 6 MB halves.
- Sharing selectively — send only the pages someone needs rather than the whole contract.
- Print workflows — some print shops prefer covers and interiors as separate files.
- Preparing for other tools — single-page files are easier to reorder, watermark or convert individually.
Tips
- Check the page count shown after selecting the file — it tells you how many outputs to expect in single-page mode.
- Outputs are numbered in page order (
page-1.pdf,page-2.pdf, …). Rename them afterwards if you need descriptive names. - Browsers may ask permission to download multiple files at once; allow it, or the tool will only deliver the first file.
- Splitting does not remove content from the original file — the source is never modified.
- For an odd page count, “split in half” puts the extra page in the second file.
Limits and troubleshooting
- Encrypted files cannot be split until unlocked. Use Unlock PDF with the password first.
- Very large files (hundreds of megabytes or thousands of pages) depend on available memory; desktop browsers cope better than phones.
- Bookmarks and form data are document-level and do not carry into the pieces.
- Nothing happens on download usually means a pop-up or multiple-download blocker; check the address-bar icon.