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Client-Side PDF Stitcher

Merge PDF Files Online

Combine multiple PDF files into one ordered document in seconds. 100% private — your files never leave your computer.

Drag and drop PDFs here, or click to browse

Select 2 or more PDF documents. Files are processed locally.

Select PDF Files
Curious how in-browser PDF merging works?
Read our technical breakdown of PDF cross-reference tables and memory sandboxing.
Read Technical Guide

How to Merge PDF Files in 3 Simple Steps

Follow this quick guide to stitch multiple PDF reports, contracts, or presentation slides together:

Step 1

Upload Your Files

Drag and drop your PDF documents into the upload box or click to select them from your local drive.

Step 2

Arrange Page Order

Use the Move Up and Move Down arrow buttons to arrange your documents in the exact order you desire.

Step 3

Download Instantly

Click Merge. Our local browser engine generates the new PDF immediately without waiting for server uploads.

Frequently Asked Questions

Are my documents sent to your servers?

No. PDF Toolkit Pro executes 100% on your device using client-side JavaScript. Your confidential files never touch an external server or database.

Is there a limit on file size or number of files?

Because processing happens on your local device, there are no artificial subscription paywalls or file quantity limits. It can handle hundreds of pages as long as your computer has standard free memory.

Are hyperlinks and vector resolutions preserved?

Yes. The underlying vector paths, typography metrics, and structural page streams are retained in accordance with the ISO 32000-1 specification.