How to Merge PDF Files: A Complete Guide

Merging PDFs is one of the most common document tasks. Whether you're combining chapters, merging invoices, or assembling a report, this guide shows you the fastest way to do it.

When to Merge PDFs

• Combine multiple scanned pages into a single document
• Assemble a report from separate section PDFs
• Bundle invoices and receipts for accounting
• Create a portfolio from separate files

How to Merge PDFs Online

1. Open the [Merge PDF](/tools/merge) tool.
2. Click or drag to upload two or more PDF files.
3. Reorder the files by dragging if needed.
4. Click Merge PDF and download the combined document.

Maintaining File Order

The order of files in the uploader matches the order in the final PDF. Drag files up or down before merging to get the exact order you need.

Preserving Bookmarks and Links

Our merge tool preserves:

• Internal bookmarks (document outlines)
• Hyperlinks
• AcroForm fields (fillable forms)

Tips for a Clean Merge

• Ensure all PDFs have the same page size if you want a consistent document.
• Compress the merged PDF afterward if file size is a concern.
• For very large merges (20+ files), consider splitting the batch into two operations.