Combine several PDFs in the exact order you want. It all happens on your device — your documents never touch a server.
Add two or more PDF files. They combine in the order you arrange them.
Drop in two or more PDF files. Each shows a thumbnail and its page count.
Drag the files, or use the arrows, to arrange the order they'll be combined.
Combine them into one PDF that downloads straight to your device.
No. Merging happens in your browser using code that runs on your own machine — the files are never sent to a server. You can even go offline after the page loads and it still works.
There's no fixed limit — it's bound by your device's memory. Dozens of ordinary documents are no problem; merging hundreds of megabytes at once can strain a phone, so on mobile keep it reasonable.
No. Pages are copied across exactly as they are — there's no re-compression, so text stays sharp and images keep their original quality. The combined file is roughly the sum of the originals.
Merge combines whole files in the order you arrange them. To pull out or rearrange specific pages first, use the Split PDF tool, then bring the results here.
PDFs that are protected but still open without a password work fine. A PDF that requires a password just to open can't be processed — remove the password first, then merge.