Split PDF by Size
Split a PDF into parts that each stay under a file size.
Runs on your device · no upload
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About Split PDF by Size
Split PDF by Size breaks a large PDF into several smaller files that each stay under the limit you choose. It is useful for email attachments and upload forms. Download every part, or all of them in one ZIP.
1
Add your PDF
Choose a file from your phone or computer. It never leaves your device.
2
Adjust and run
Pick your options, then tap the main button.
3
Download
Save the result. No watermark, no sign-up.
Frequently asked questions
Why is one part bigger than my limit?
A single page that is larger than the limit cannot be divided, so that page becomes its own larger part.
Do I get one file or many?
Many. Download each part, or all together as a ZIP.
Are my files uploaded anywhere?
No. This tool runs in your browser, so your file stays on your device and is never sent to a server.