Free PDF Split by Size Online
Split a large PDF into multiple smaller parts, each under a specified maximum file size. Specify the size limit in MB and the tool divides pages accordingly. No upload — powered by pdf-lib.
Drop large PDF here or browse
PDF files only · Max 200 MB
About PDF Split by Size
This tool uses pdf-lib to extract individual pages and groups them into chunks, testing the size of each chunk until it exceeds the target limit, then starting a new chunk. Because PDF structure overhead makes exact size prediction difficult, the tool uses an estimated approach: it groups pages proportionally. All processing runs locally in your browser.
Note: Exact file sizes may vary slightly from the target due to PDF metadata and structure overhead. Each part will be close to but may not exceed the specified limit.