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Split by Size
Split PDF based on file size (e.g., <10MB)
What is Split by Size?
When a PDF is too large to email or upload, splitting it by file size creates chunks that each stay under the limit. PDFStream's size-based splitter divides the document into segments that target a maximum size per file.
Set the target size per output file. The tool splits at page boundaries, keeping as many pages as possible within the size limit before starting a new file.
Use cases: splitting a large archive for email attachment limits, dividing a document for platforms with per-file upload caps, creating manageable segments of a large scanned batch, or preparing a document for a submission portal with a file size restriction.
How-to
- 1
Upload file
Select the PDF.
- 2
Target size
Enter the maximum file size (MB) for each split part.
- 3
Split & Download
Download the split PDFs as a ZIP file.
Practical tips
Set a target below the limit
Choose a size slightly under the email limit, since parts are split at page boundaries and may vary.
Pages are never cut
Each part contains whole pages, so file sizes are close to the target but not exact.
Send large reports in parts
Splitting a 60MB scan into 25MB parts makes it fit common email attachment limits.
Frequently Asked Questions
Is the result exactly the requested size?▼
Since we split by page, the result will be as close as possible to the target size, but may not be exact.
Can I meet email attachment limits?▼
Yes, e.g., setting it to 25MB helps meet Gmail's limit.
Are files stored on your server?▼
No.
Last Updated: August 6, 2026
