Merge PDF
Combine two or more PDFs into one document, in the order you choose, without uploading them anywhere.
1 · Choose the PDFs
2 · Merge and download
No files chosen yet.
The combined PDF appears here.
Merging happens in this browser. Your PDFs are not uploaded, stored or logged.
Your file is never sent to a server. It is read and processed by your own browser, and the results are not stored.
How to use it
- Choose two or more PDFs, or drag a group of them onto the drop area.
- Reorder the list with the arrows — the order on screen is the order in the output.
- Check the page count shown against each file and the total at the bottom.
- Press Merge, then download the single PDF that comes back.
Limits worth knowing
- Up to 10 files per merge, 25 MB each and 60 MB combined. The ceilings are about memory rather than storage: a merged document is assembled in your browser tab, and a very large one is how tabs crash.
- Page sizes are not normalised. If you merge an A4 scan with a Letter report, the result contains both sizes, exactly as a PDF allows. A reader shows each page at its own size.
- Bookmarks, form fields, annotations and embedded file attachments are not carried across by the copying method this tool uses. Page content and page order are. If your documents rely on a table of contents or a fillable form, check the merged file before you send it.
- Password-protected PDFs are refused, not bypassed. Remove the password in whatever applied it, then merge.
- A file that will not parse stops the whole merge with a message naming it, rather than producing a document that is quietly missing a section.
What merging actually does
Each page is copied out of its source document and appended to a new one, in list order. That is why the order on screen matters and why the page count per file is shown before you press anything: the output is the sum of what you can see.
The page content itself is not redrawn. Text, images and vector graphics come across as they were written, so a merged document looks like its parts rather than like a re-print of them.
The finished file is re-opened before the page count is reported, so the number you are shown is read out of the result rather than added up from the inputs.
When merging is the wrong tool
If the documents are different sizes and you need one consistent page size, merging will not fix that — it preserves each page as it is. Re-exporting the sources at a common size first is the reliable route.
If you only want some pages from each document, extract those pages first and merge the extracts. That way the selection is explicit instead of something you hope the order achieved.
If the files are scanned images and the result is unwieldy, the problem is the scans rather than the merge. Compressing the images before rebuilding the PDF is a different job again.
Privacy and what is not stored
The files are read with the browser’s own file API and assembled in memory. There is no upload endpoint on this site, no server component that could accept one, and no analytics that sees a file name.
Nothing is written to disk by the tool, and closing the tab discards everything it held.