PDF Merger — Free Online Tool
Combine multiple PDF files into a single document. Files are merged in the order listed.
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Click to select PDF files to merge
Select 2 or more PDF files
About PDF Merger
The PDF Merger lets you combine several PDF documents into one neatly ordered file right in your browser. It is perfect for joining chapters, invoices, scanned pages, or reports into a single shareable document.
Because the tool uses client-side processing, your files are never uploaded anywhere. That makes merging fast, free, and safe even for sensitive contracts and personal paperwork.
How to Use PDF Merger
- Click the upload area and select two or more PDF files.
- Use the up arrow to reorder files or the remove button to drop any you don't need.
- Click 'Merge PDFs' to combine them in the listed order.
- The merged PDF downloads automatically to your device.
Key Features
Combine unlimited PDF files into a single document
Reorder files easily before merging
100% client-side processing - files never leave your device
No watermarks, signup, or file size limits
Preserves original page quality and formatting
Frequently Asked Questions
How many PDF files can I merge at once?
There is no hard limit. You can add as many PDF files as you like and merge them into a single document. Performance depends on your device's memory since everything runs locally.
Are my PDF files uploaded to a server?
No. The PDF Merger works entirely in your browser using the pdf-lib library. Your files never leave your device, which keeps confidential documents completely private.
Can I change the order of the files before merging?
Yes. Each file in the list has an up arrow to move it higher and a remove button. Pages are combined in the exact order shown in the list.
Will merging reduce the quality of my PDFs?
No. Pages are copied as-is into the new document, so text, images, and formatting stay identical to the originals with no quality loss.