Merge PDF Files

Combine 2 to 4 PDF files into one single PDF easily and for free.

Drag & Drop PDF files here or click to select

Free PDF Merger – Online Tool

Merge up to 4 PDF documents into one with Ref4.com. Simply upload your PDFs and download the merged file instantly.

How to Use

  1. Upload or drag and drop 2–4 PDF files into the box.
  2. Click “Merge PDFs” to start combining.
  3. Download your new single PDF file instantly.

This tool is fast, secure, and 100% free — ideal for merging reports, eBooks, or contracts.