Split by file size

Cuts the document into parts that each stay under your limit — made for e-mail attachment caps. Part boundaries are found with real produced sizes, not estimates. A single page larger than the limit ships alone; only the desktop app's compression can shrink it further.

This tool runs entirely in your browser — the file is never uploaded. You can disconnect from the internet after the page loads and it still works.

Drop files here or click to choose

One PDF file

Max part size

Need more than this page can do?

The PDF Toolbox desktop app compresses, redacts with verified removal, OCRs scans, repairs damaged files, converts to PDF/A and handles 500-page documents — all offline, on your machine, with the same promise: nothing ever leaves it.