PDF Merge
Pairs well with
About PDF Merge
Merge multiple PDFs into one — drag to reorder, drop to combine. Runs entirely in your browser using pdf-lib; your files never upload anywhere.
How to use it
- Drop your PDFs onto the upload zone.
- Drag the thumbnails to reorder.
- Click Merge to combine.
- Download the result.
Most online PDF mergers upload your files to a server, process them there, and email or hand back a link. That’s a privacy hazard if the PDFs contain anything sensitive (contracts, medical records, tax docs). This one runs in your browser via pdf-lib — the file never leaves your device.
Output preserves the original page sizes, fonts, and bookmarks. PDF/A and form fields are kept on a best-effort basis; encryption is preserved as long as you can open all the input files.
Common questions
Is there a file size limit?
Are my PDFs uploaded?
Like every tool on Buncha, this one runs entirely in your browser. There's no upload, no log, no record of what you've pasted or generated. Close the tab and the data is gone.