Split PDF by Size

Split a large PDF into smaller files under a size limit

Choose file

or drop your PDF here

Split a large PDF into smaller files under a size you choose, ready to email or upload anywhere with a size limit.

How it works

How to split a PDF by file size

Each part is measured as it's built, so every file comes in under your limit, not just close to it.

Parts are made of consecutive pages, each holding as many pages as fit, and are numbered part 1, part 2 and so on.

Pick 1, 2, 5, 10 or 25 MB in one click to match email attachments and upload forms, or type any size.

Questions

How do I make a PDF small enough to email?

Choose a limit just under your email provider's attachment size, such as 10 MB or 25 MB, and send the parts in separate emails.

What if a single page is bigger than the limit?

That page is saved as a file of its own and you'll see a note about it. Run it through Compress PDF to make it smaller.

Can I put the parts back together later?

Yes. Use Merge PDF to combine the parts in order into the original document.

Is Split PDF by Size free?

Yes. It is free to use, with no sign-up and no watermarks added to your files.

Can I split a PDF by size on my phone?

Yes. CrestPDF works in any modern browser on Windows, Mac, Linux, iPhone, iPad and Android, with nothing to install.