How to merge several PDF files into one
A file to send as a single attachment, invoices to archive together, chapters scanned separately: merging PDFs is one of the most common tasks. Here is how to do it cleanly, and what to check before sending the result.
Updated on October 27, 2026
Open the tool: Merge PDFsPrepare the files
First gather all the PDFs in one folder and rename them if their order matters (for example 01-cover.pdf, 02-contents.pdf). Make sure none is password-protected: a locked PDF cannot be merged until its owner unlocks it.
Merge in the browser
With AVEROPDF's Merge PDFs tool, it takes three steps:
- Drop your files in the drop zone (or click to pick them). You can add more afterwards.
- Reorder them by drag and drop or with the arrows. The order shown is the final order.
- Click “Merge”, then download the resulting document.
Good to know
Pages are copied as they are: no recompression, no quality loss. Different page formats (A4, Letter, landscape) are kept. Bookmarks of each file, however, are not carried into the merged document.
Everything happens in your browser: the files go through no server, which matters for contracts, medical or accounting documents.
Take action
Combine several PDF files into a single document, in the order you choose.
Merge PDFsRelated tools
- Split a PDFCut a PDF into several files based on page ranges you define.
- Organize PDF PagesReorder, rotate or delete pages from thumbnails.
- Compress a PDFReduce a PDF's file size by cleaning its structure and recompressing its images, with a transparent report.
- Edit a PDFEdit existing text, add text, annotations, shapes, images and a signature.