Merge PDF
Join several PDF files into a single document, in order — all locally in your browser, nothing uploaded.
Tip: add several PDFs — pages from all files land in one grid you can reorder freely before merging.
Page thumbnails appear here — click to select, drag to reorder, ⟳ to rotate, ✕ to remove.
Merge PDF files
Add two or more PDFs and every page shows up as a thumbnail in one grid. Drag pages to reorder (even across files), keep only the ranges you need, rotate sideways pages, then export a single combined PDF — all locally in your browser, nothing uploaded.
Merge PDFs without uploading them: this tool uses the pdf-lib library compiled to run in your browser, so contracts, medical records and payslips never leave your device — the whole job works offline once the page is loaded. Drag files to reorder, then download a single combined document. Page sizes are preserved per source page (a mix of A4 and Letter stays mixed).
Limits: password-protected PDFs must be unlocked first (we cannot and do not bypass encryption); interactive form fields and some annotations may flatten or drop, as merging rebuilds the document structure; and extremely large merges are bounded by your device's memory — hundreds of ordinary pages are fine, thousand-page scans may struggle on a phone. Last verified: July 2026.
FAQ
Is there a file count or size limit?
No artificial one — the practical limit is your device’s RAM since everything happens locally. Merging dozens of typical documents is instant on a laptop; for a 500 MB scan archive, prefer a desktop browser.
Will bookmarks, forms and signatures survive the merge?
Page content always survives. Form fields and digital signatures generally do not (signatures are invalidated by any modification, by design), and bookmarks are not carried over. If you need fillable forms after merging, merge first, then rebuild the form.
Can I merge encrypted PDFs?
Not directly — remove the password first (open + save via your PDF viewer with the password you legitimately have). We deliberately do not implement password cracking.
Does the page order follow my file list?
Yes — drag the file cards to reorder before merging; all pages of file 1 come first, then file 2, and so on. For picking individual pages out of one document, use the companion PDF split tool first.