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.

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.

Is this tool free?▼

Yes.

Are files stored on your server?▼

No.

Can I use it on mobile?▼

Yes.

Is quality maintained?▼

Yes.

Is there a file size limit?▼

No.

How long does it take?▼

Seconds.

Can I download multiple times?▼

Yes.

What if an error occurs?▼

Check file encryption.

Last updated: June 26, 2026

Split by Size

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What is Split by Size?

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