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Merge PDF Files Online

Merge PDF documents into one file online. Choose multiple PDFs, arrange their order, and download the combined document using your browser.

Enable JavaScript to use the interactive controls. Your guide and examples are available below.

Features

About PDF Merger

Combine two or more PDF documents into a single downloadable file. Arrange the files in the order you want before you merge them, such as a cover page followed by the main document and appendices.

How to use it

  1. Select two or more PDF documents using the file picker or the available drop area.
  2. Check the selected files and arrange them in the final order. Put the document you want first at the top.
  3. Run the merge operation to combine all pages into one PDF.
  4. Download the merged PDF. Open it to check page order, layout and any forms or links that matter.

Combine a report with its appendices

Choose cover.pdf, report.pdf and appendix.pdf in that order, then merge them into one document.

Supported formats

Processing and limitations

Browser

Encrypted, malformed or unsupported PDFs may fail in PDFLib.

Questions and answers

How do I merge PDF files in a particular order?

Add the PDF files and arrange them before starting the merge. The combined output follows that file order.

Do PDF files have to be uploaded to merge them?

The merge operation uses browser-side PDF processing. Choose local files, combine them and save the resulting PDF on your device.

Can I combine password-protected PDFs?

Encrypted or unsupported files may fail to load. Use an accessible, authorized copy of each PDF and check the combined output.

Will merging change the original page layout?

Pages are copied into a new PDF. Review the finished file, particularly if the originals have interactive features or unusual structure.

What if I only need selected pages?

Use the PDF Splitter to extract the pages you need first, then merge the resulting documents if necessary.

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