How to Merge PDF Files Into One Document

Combine multiple PDF files into a single document in seconds. Learn how to merge PDFs online for free with drag-and-drop reordering.

Need to combine multiple PDF files into one? Whether you're merging invoices, combining report chapters, or assembling a portfolio, merging PDFs is one of the most common document tasks. Here's how to do it for free in your browser.

How to Merge PDFs with ProPDF

  1. Open the Merge PDF tool and upload your PDF files by clicking "Select files" or dragging them into the upload area.
  2. Arrange the files in your desired order by dragging and dropping the thumbnails.
  3. Click "Merge PDF" to combine all files into one document.
  4. Download your merged PDF. The original quality and formatting of all files is preserved.

Common Use Cases for Merging PDFs

Combining invoice or receipt scans into a single expense report. Merging multiple contract pages or appendices into one file. Assembling portfolios, presentations, or multi-chapter documents. Consolidating scanned pages from different sources into one document.

With ProPDF, there's no limit to the number of files you can merge, and no maximum file size restriction. Processing happens entirely in your browser for maximum privacy.

Why ProPDF for Merging?

Unlike competitors that require accounts or limit free usage, ProPDF lets you merge unlimited files completely free. Your files are processed locally in your browser — they're never uploaded to any server. This makes ProPDF the safest choice for confidential documents.