Do my PDFs get uploaded?

No. Everything is assembled by pdf-lib inside your browser tab — nothing is sent anywhere.

Are the original PDFs preserved?

Yes. Merging embeds the source pages as-is; splitting extracts one page per output file.

Bulk Tools

Combine multiple PDFs into one file or split any PDF into per-page files as a ZIP.

Add PDF files to merge

Reorder with the arrows before merging

Choose PDFs

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