Split PDF files by size

With Split a PDF by size, teams preparing documents can prepare a document before printing or sharing. Split a PDF into parts that each stay under a size you choose.

Split a PDF into parts that each stay under a size you choose. The tool is free in your browser and shows the result without asking you to create an account.

How to use

Upload the large PDF that needs to be divided into several parts from your computer or phone.
Enter the maximum size you want for each part, in megabytes, according to the limit you must respect.
Run the cut action so the browser splits the pages into lighter files.
Wait while the different parts are prepared, then open the list of generated files.
Download the files and check that each one stays under the requested size. Compare the total page count if the document must stay complete.

Example

A team must send a heavy report by email, but the attachment is rejected because of its size. They split the PDF into parts under the required limit and then send the files separately to colleagues who need the document. This keeps the message within the allowed attachment size.

Limits and formats

Splitting is based on size, not on page count or logical sections of the document.
A protected or damaged PDF may prevent the parts from being created.
Check every file after download, because pages may be grouped differently than you expect.
The tool does not compress content; it separates the document into multiple PDFs.
Several output files may be produced, so name them clearly after receiving them.

Where processing happens

Everything runs inside your browser. The PDF is read locally and then split into several files according to the requested size. The parts stay on your device until you download them, with nothing sent away and no change to the source file. The original is not modified.

Frequently asked questions

How do I choose the size of each part?

Enter the maximum size that each final PDF should not exceed. The tool then distributes pages to create files that respect this limit as closely as possible, depending on the content.

Are pages cut in the middle?

The tool works with whole pages. A page should not be split in two, but the distribution depends on content size and may surprise you in a very dense document.

Can I rebuild the original PDF later?

Yes, if you keep all the parts. You will then need to merge them with a suitable tool, because this page does not provide an assembly function.