Merge PDF

Combine multiple PDF files into one document.

Browser-based PDF processing
  • This tool runs directly in your browser during normal use.
  • Your PDF is not uploaded to or stored on Filechanges servers for this workflow.
  • Temporary working data stays in your current browser session until you reset the tool, refresh the page, or close the tab.
Read processing, security, and deletion details
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Click or drag to upload
Supported: PDF

What Is PDF Merging?

PDF merging is the process of combining two or more separate PDF files into a single unified document. This is commonly needed when consolidating reports, combining scanned pages, merging invoices, or assembling a portfolio from multiple source files.

Our tool uses the powerful pdf-lib library entirely in your browser to merge PDFs without uploading your documents to any server, ensuring complete privacy for sensitive business or personal documents.

How It Works

1
Upload PDFs
Add two or more PDF files by clicking or dragging them.
2
Arrange Order
Remove any unwanted files from the list before merging.
3
Download Merged
Get your single combined PDF file instantly.

Why Use This Tool?

  • Merge unlimited PDF files into one document with no page limits.
  • Preserves all formatting, images, and embedded fonts from original files.
  • Runs 100% client-side — documents never leave your browser.
  • No account registration, no watermarks, completely free.
  • Works with encrypted and form-filled PDFs.

Frequently Asked Questions

Is there a limit on how many PDFs I can merge?
No. You can merge as many PDF files as your browser's memory allows. For most users, merging 50+ files works smoothly.
Will the merged PDF lose any formatting?
No. Our tool copies pages exactly as they are, preserving all text, images, fonts, and layouts from each original file.
Can I reorder the PDFs before merging?
Currently you can remove unwanted files from the list. Full drag-and-drop reordering will be available in a future update.
Are my documents secure?
Yes. All merging happens directly in your browser. Your PDF files are never uploaded to any server, ensuring your sensitive documents remain completely private.