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PDF Split
Extract page ranges into a new PDF, or split every page into its own file.
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PDF Merge
Combine several PDFs into one file, in the order you choose.
Tool Panel
Processed locallyAbout 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.
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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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