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Merge & organize

Split by File Size

Break a PDF into parts that each stay under a size limit.

Options

Only if the file is password-protected.

Add a file to begin.

How it works

  1. 1Upload your file — drag it in or pick it from your device.
  2. 2Choose the options you need; defaults work for most files.
  3. 3Press Process and watch the progress in real time.
  4. 4Download the result. Anonymous files are deleted shortly after.

What this tool does

  • Accepts: .pdf · one file at a time
  • Produces: pdf, zip
  • Runs on: the pdf worker, in an isolated process with a 3-minute ceiling
  • Account: not required — daily anonymous limit applies
  • API: available as toolSlug: "split-by-size"

Questions

Will every part be exactly the size I asked for?

No — each part is as large as it can be without exceeding your limit. PDF pages are not uniform, so the parts differ.

What if a single page is larger than the limit?

That page becomes its own part and the tool warns you. Compressing first usually solves it.

Security note

Files are checked to be what they claim (by content, not extension), processed in a sandboxed worker with no network, and deleted on the schedule your plan sets. We do not run antivirus and do not claim to — please do not upload files you do not trust. Read the security page.