Some upload forms and email providers reject files past a certain size, no matter how many pages they contain. Split by Size divides a large PDF into several smaller files, each capped under the target size you choose, so every part clears the limit.
How to split by size
- 1
Upload your PDF file
Drag it onto the upload area, or click to choose it from your device.
- 2
Select Split by Size
Choose the tool, then set your target size per file.
- 3
Click Split
Your file is processed on our server, which is what lets it measure and cap each part's exact size.
- 4
Download your files
Every part comes zipped into a single download, each one under your target size.
Why use RealPDFTool for split by size
Hits a real, measured size cap
Each output file is checked against your target, not just split by an estimated page count.
Every file, zipped in one download
No downloading parts one at a time.
Frequently asked questions about split by size
How accurate is the target size?
Each output file is measured after splitting to stay at or under your chosen target, accounting for pages that vary a lot in size.
Is there a file size limit for the upload itself?
PDFs up to 100MB are supported, since this tool runs on our server.
Can I choose how many output files I get?
The number of files depends on your target size and the document's total size — set a smaller target for more, smaller files.
Are my files stored on your servers?
Files are processed for the split and then deleted — they aren't kept or reused.