Calculator
What the Split PDF does
Split PDF: splits one PDF into separate documents at the page numbers you choose, copying pages rather than re-rendering them so nothing is degraded. Everything runs in your browser and the file is never uploaded.
Drop in a file and the Split PDF handles it locally. The work happens inside your browser tab, so there is no upload to wait for and no queue.
Typical users are people preparing a file to send. Uploading a document to an unknown server is exactly what you should avoid with anything private.
There is no back end here. The calculation runs where you are sitting, not on a server somewhere.
Each field is explained further down, along with the method and a worked example that uses the default values.
What do the Split PDF fields mean?
The Split PDF uses 2 inputs. Sensible defaults are loaded up front, which means you can change one number at a time instead of filling the whole form first.
| Field | What to enter | Default |
|---|---|---|
| PDF File | stays on your device | none |
| Pages (e.g. 1-3,5) | required | 1 |
How does the Split PDF work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same result.
Validation runs before the calculation, which is why a mistyped value shows an error rather than a plausible-looking result.
What a typical run looks like
You provide: PDF File and Pages (e.g. 1-3,5)
What happens: the file is read into memory by your browser, processed locally, and offered back as a download. It is never uploaded.
You get back: a new file plus a brief account of what happened to it, shown in the panel.
How long this takes is a property of your computer, not of our infrastructure, and file size is bounded by browser memory.
Read next: How PDF Compression Actually Works
How to use it
- Choose your file under PDF File, or drag it onto the drop area.
- Put Pages (e.g. 1-3,5).
- Press Split.
- Check Status, Extracted Pages and Original Pages on the right.
- Print gives a tidy version without the navigation, which is handy for attaching to a file.
What this tool does not do
- Encrypted or password-protected files must be unlocked before they can be processed.
- Very large documents are limited by your device memory, not by a server quota.
- Edge cases at the very limits of the accepted range are handled, but rarely worth relying on.
- Large files are limited by your available memory, not by an upload quota.
Frequently asked questions
PDF File and Pages (e.g. 1-3,5). That is the whole form. Nothing starts empty, so the quickest approach is to replace the one number you actually care about.
No upload takes place. The file is handled entirely in the browser and discarded when you close the tab.
No payment and no login. Advertising covers the running costs.
It follows the standard definition for this operation, so the result matches what a reference implementation would give.