PDF Split by Size
Split large PDF into smaller files by MB size. Fit email limits.
Click or Drag PDF Here
Maximum file size: 20MB
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What is This Tool?
Split large PDF files into smaller chunks by file size online for free. This tool breaks a big document into multiple parts, ensuring each part is under your specified size limit (e.g., 25MB for email).
Email attachments often have size limits. Instead of compressing quality, split your document into Part 1, Part 2, etc. Our tool calculates page sizes to split efficiently.
How to Use
Upload PDF - Drag and drop your large PDF. Processing in browser.
Set Size Limit - Enter maximum size per file (e.g., 10MB, 20MB).
Split & Download - Tool divides PDF into chunks that fit the limit. Download as ZIP.
Frequently Asked Questions
Is the size exact?
It's an estimate. We leave a safety buffer to ensure it fits.
Will pages be cut?
No, splits happen between pages. We never cut a page in half.
Can I rejoin them later?
Yes, use our Merge PDF tool to combine them back.
Is my data secure?
Yes. All processing in browser.
What's the max input size?
Supports PDFs up to 100MB.