Merge PDF
Combine several PDFs into a single file. Pick the files in the order you want them, and merge.
Your files are processed entirely in your browser — they are never uploaded to a server.
About this tool
Merging here happens on your own device: the files are read by your browser, combined page by page, and offered back as a download. Nothing is uploaded, which makes this the right choice for contracts, statements and anything else you would rather not hand to a stranger's server.
Pages keep their original quality and size — merging copies pages exactly as they are, without re-rendering or compressing them. The merged file is simply the sum of its parts.
How to use it
- Click the file picker and select two or more PDFs (Ctrl/Cmd-click for several).
- The order you select them in is the order they are merged — most browsers list them in selection or name order.
- Press Merge PDFs and save the combined file.
Frequently asked questions
Is there a file size or page limit?
No fixed limit — the boundary is your device's memory. Files of a few hundred pages merge comfortably on a typical laptop or phone.
Are my files uploaded?
No. The merge runs in JavaScript inside your browser using the pdf-lib library. You can verify it by loading this page, going offline, and merging — it still works.
Will the merged PDF lose quality?
No. Pages are copied exactly, not re-rendered, so text stays sharp and selectable.