Split PDF by file size
Split a large PDF into smaller files that each stay under a size limit, for email attachments and upload forms.
How to split PDF by file size
- 1
Open your PDF
Select the large PDF you need to send or upload.
- 2
Set the limit
Enter the maximum size per file, for example 10 MB.
- 3
Split and download
Download the parts, each under your limit where possible.
Private by design
Your files are processed on your own device and never uploaded to a server.
Fast
No waiting for uploads or downloads. Results are ready in seconds.
Free, no signup
Use every tool without creating an account or adding a watermark.
Frequently asked questions
What if a single page is larger than the limit?
That page becomes its own file, because a page can’t be split further without changing its content.
Which size should I pick for email?
Many email services limit attachments to 20–25 MB; 10 MB is a safe choice for most.
Are my files uploaded to a server?
No. This tool runs entirely in your web browser, so your files never leave your device. That makes it safe for contracts, invoices and other private documents.