Combine several PDFs into one, in your chosen order. The files are processed by your browser — they never leave your computer.
Drop PDF files here, or click to choose
Pick as many as you like — they merge in list order.
Tip: drag rows aren't needed — remove a file and re-add it where you want. Encrypted (password-protected) PDFs can't be merged.
Combine several PDFs into one, in your chosen order, without uploading any of them.
Merging runs on pdf-lib, an open-source PDF library, entirely inside this page. Each file's bytes are read, parsed into a document object, and its pages are copied — page objects, not screenshots — into a fresh output document. Copying page objects preserves text, vectors and internal structure, which is why merged PDFs stay sharp and searchable rather than becoming flattened images.
Two practical boundaries: browser memory sets the ceiling (hundreds of pages merge comfortably; gigabyte scans may not), and encrypted files fail by design — pdf-lib refuses to open password-protected PDFs, and the tool surfaces that as a clear error rather than a broken output.
The privacy property is structural, not a promise: there is no upload step, so there is nothing on a server to breach, retain, or train on. Contracts, payslips and medical paperwork can be merged with the same confidence as a recipe collection.
Good merge hygiene: keep a naming convention for the output (contract-name-date.pdf), and merge in the order you'd print — cover, body, appendices. The remove-and-re-add flow edits order by rebuilding the list; for long lists, get the order right before adding rather than shuffling afterward.
A note on expectations: merging preserves each file's internal quality but not its document-level conveniences. Security settings don't carry over (merged output is unencrypted by design), and per-file form fields or digital signatures generally don't survive the copy into a new document — merge unsigned working copies, and apply signatures after merging on the final document.
List order is merge order — remove a file and re-add it where you want. For reordering pages within one file, extract and merge back with the Extract tool.
Page content survives fully; document-level extras like outlines/bookmarks and some form fields may not carry across files, since a merged document builds fresh document-level structures.
Only your browser's memory. Typical documents merge instantly; if a very large scan fails, close other tabs or split the job in two.
Encrypted PDFs require the owner's authorization to modify. Remove the password (usually File → Save without security) first, then merge.
No — page objects are copied, not re-rendered. Generation 10 of merge-and-extract has identical text and vectors to generation 1. (Screenshot-based tools compress every generation; object-based ones don't.)
Yes — extract produces an ordinary PDF that merges like any other.
Memory only. Contracts and statements merge in milliseconds; a 500-page scanned archive may need the browser to itself.
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