How to Merge PDF Files Into One Document

What does merging PDFs mean?

Merging PDFs combines two or more separate PDF files into one document. The pages are normally placed one after another in the order you choose.

It is useful for combining forms, invoices, reports, scanned pages or chapters that were created separately.

Want to try the idea yourself? Use the PDF Merger.

Put the files in the right order first

Before merging, decide the final sequence. If you have a cover page, supporting documents and an appendix, arrange them in that order rather than fixing the sequence afterwards.

Clear filenames can make this easier when you are combining many documents.

If you want to explore this topic further, see How to Split a PDF Into Separate Pages or Sections.

Check for unwanted pages

A merged file will usually include every page from each source PDF. Blank pages, duplicate scans or old versions can therefore end up in the final document.

Remove or split unwanted pages before merging, or reorder the finished PDF if necessary.

Does merging reduce quality?

Simply combining PDFs should not normally require visible image-quality loss. Compression is a separate task and may change image data depending on its settings.

If the merged file becomes too large, compress it afterwards rather than assuming merging itself needs to reduce quality.

Merge PDFs online

The PDF Merger lets you add multiple PDFs, arrange them and create one combined file in your browser.

After downloading the result, quickly check the first page, last page and transitions between the original documents to confirm the order is correct.