Document Tools
PDF Split
Extract page ranges into a new PDF, or split every page into its own file.
Document Tools
PDF Merge
Combine several PDFs into one file, in the order you choose.
Tool Panel
About PDF Merge
Merges PDFs in the order you arrange them; a file that cannot be read is reported without failing the rest. Files stay in your browser.
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The merge order is the **list order**: files appear in the order you added them and the arrow buttons on each row reorder them — no alphabetical sorting, no guessing what you meant.
- 2
Pages are copied into a new document one by one, so page content is preserved verbatim (no re-encoding, no re-compression) and the result is roughly the sum of the inputs.
- 3
Everything runs in the browser (pdf-lib loads on demand) and nothing is uploaded; the result downloads as merged.pdf with the total page count shown.
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Choose PDF files
Multi-select works; each file reports its page count as it is added, which is how you catch a wrong pick.
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Reorder with the arrows
The up and down buttons set the order — the list from top to bottom is exactly the output order.
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Merge and download
The total page count appears, and the download gives you merged.pdf.
No: the merge is a **page-level copy**. Page content (text, images, annotations attached to a page) comes along, while document-level structures — outlines/bookmarks, AcroForm fields, embedded files — are not part of a page and do not follow. Keeping bookmarks needs a tool that handles outlines (qpdf, Ghostscript).
A password-protected PDF cannot be opened at all and the tool reports an error — remove the password first. And **a digital signature is always invalidated by merging**: once the pages sit in a new document the signed byte range no longer matches, so verification cannot pass. Decide deliberately whether those files belong here.
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