How to Split by Size Online
Step-by-step instructions to split pdf into parts under a maximum file size with ZiaSign.
Why this workflow matters
ZiaSign's PDF size splitter divides large PDFs into smaller files that fit under your specified size limit. Perfect for splitting documents to meet email attachment limits (10 MB for Outlook, 25 MB for Gmail). Pages are grouped sequentially — no content is split mid-page.
Step by step
Split by Size is one of the fastest ways to split pdf into parts under a maximum file size. Free Account access gives you the full workflow.
- 1
Upload your PDF
- 2
Set maximum file size per part
- 3
Click 'Split'
- 4
Download the ZIP
Frequently asked questions
What size limits can I set?
Set any maximum file size from 1 MB to 100 MB per part. Common choices: 10 MB for email, 25 MB for Gmail.
How are pages divided?
Pages are grouped sequentially until the size limit is reached, then a new file begins. No page is split mid-content.
Can I split for email attachment limits?
Yes. Set the limit to your email provider's attachment size (e.g., 25 MB for Gmail, 10 MB for Outlook) and each part will fit.
How many parts will my PDF be split into?
It depends on the original file size and your chosen limit. The tool shows the number of parts before you confirm.
More specific workflows for this tool
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Read guideReady to run the actual workflow?
You have the steps. Open the tool, process the file, and then move into the next recommendation if the document still needs cleanup, protection, or conversion.