PDFdu Free Online PDF Merger

More advanced features, please download

PDFdu Free Merge PDF Files

Merge PDF documents into a single one, free of charge.

Select Files
You can select multiple files at once

Old Page Size First Page Size A4 Vertical A4 Horizontal

Online PDF Files Merge

quickly and easily merge multiple PDF documents, simple and efficient

combined up to 20 PDF files each time.

You can set the page size

Merge two or more PDF files:

Click each Browse button to specify and upload PDF files.

Check Add button to add more PDF files .

Click Merge PDF and wait.

Download the Merged PDF to your computer or Directly open in your IE browser.