Question 1

Do you upload my PDF to a server?

Accepted Answer

No. Splitting runs entirely in your browser using pdf-lib. Your file never leaves your device.

Question 2

What are the split modes?

Accepted Answer

Three modes are supported. Every page produces one PDF per page. By ranges lets you type ranges on separate lines (for example 1-3, 4-8, 9-12) — each line becomes one output PDF. Every N pages chunks the document into fixed-size slices (every 2, 5, 10, or any custom N).

Question 3

How do I write a page range?

Accepted Answer

Use a hyphen for ranges (1-3), a comma for lists (1,3,5), or combine them (1-3,7,10-15). Whitespace, semicolons, and reversed ranges like 5-1 are all handled automatically. Duplicate page numbers are deduped silently.

Question 4

Is there a limit to the number of output files?

Accepted Answer

No fixed limit, but very large splits (say 1000+ outputs) may be slow on low-memory devices. The whole document loads once and is reused across every output, so memory use stays modest.

Question 5

Are the split PDFs the same quality as the original?

Accepted Answer

Yes. Splitting is lossless — pdf-lib copies the source pages byte-for-byte into each new document. No re-encoding, no quality change, no bloat.

Question 6

What about password-protected PDFs?

Accepted Answer

Encrypted PDFs cannot be read in the browser. Remove the password using a desktop tool first, then come back to split.

Question 7

Does splitting preserve bookmarks, links, and form fields?

Accepted Answer

Page content, images, and page rotation are preserved. Interactive form fields and outlines are kept where possible by pdf-lib; complex signed or XFA documents are better split in a desktop editor.

Free PDF Splitter

Frequently Asked Questions

Merge PDF

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Compress PDF

Extract Pages