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pdf · split
Split PDF by Size
Cuts the document into consecutive parts, each no larger than the size you set (KB), keeping page order — the classic fix for e-mail attachment limits. A single page that is bigger than the limit becomes its own part and is flagged. Parts are zipped with their page ranges in the file names.
A little guidance. A better result.
How to use Split PDF by Size
Consecutive parts each under your KB limit, page order kept, oversized single pages flagged — zipped with page ranges.
Prepare your input
Open a PDF and enter the per-part size limit.
Use the workspace
Review consecutive parts and oversized-page warnings.
Check your result
Open the ZIP and check each PDF's actual file size.
Know the limits
A single page may exceed the target by itself; splitting cannot guarantee that every part fits.
Where does my input go?
This browser tool processes your input on your device. Optional analytics is a separate choice; it is not needed to use the tool. Keep your original until you have checked the result.
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