Split a large PDF by file size
Break a big PDF into parts that each fit a size limit, privately.
When a PDF is too big to email or upload, splitting by size breaks it into parts that each stay under the limit you set. Choose a target size per part and download them as a ZIP, all processed on your device.
How to split a large PDF by size
- 1
Add your PDF
Drop in the large PDF you need to break up.
- 2
Set the size per part
Choose a target such as 5 MB so each piece stays under your limit.
- 3
Split and download
Get a ZIP of size-limited parts, built locally.
Why split large files locally
A large PDF often holds a lot of sensitive material. Splitting it in the browser means none of it is uploaded to a server just to make it fit a size limit.
Frequently asked questions
Will every part stay under my limit?+
The tool aims to keep each part under the target size. A single very heavy page can be an exception, since a page cannot be divided further.
Is my PDF uploaded?+
No. Splitting runs in your browser and the file is never transmitted.
Should I compress instead?+
If you want one smaller file rather than several parts, use Compress PDF. Split by size is for keeping the pages but in smaller pieces.
Is it free?+
Yes, with no sign-up.