PDF Merge Tool

Combine multiple PDF files into a single document. Arrange pages in any order you need before merging.

Drag and drop PDFs here, or select files

Supports PDF files only

Selected Files

Arrange the files in the order you want them to appear in the merged document, then click 'Start Merging'.

Frequently Asked Questions

Is KYOJOY PDF Merge safe? How is my privacy protected?

Very safe! KYOJOY PDF Merge runs entirely in your browser; files are not uploaded to any server. This means:

Sensitive documents never leave your device
No data leakage or third-party access risk
Works even without internet

Is KYOJOY PDF Merge free? Any limitations?

KYOJOY PDF Merge is 100% free, with no hidden fees or subscriptions—we make PDF merging easy for everyone. Our revenue comes solely from on-page ads, If you see ads while using it, they help fund the free service. As a browser-based tool, its performance may depend on your device and browser, but we keep optimizing for a smoother experience.

How does PDF merging work?

Our PDF merger combines multiple PDF files into a single document:

Upload multiple PDF files
Arrange them in the desired order by moving files up or down
Click 'Start Merging' to combine all files
Download the merged PDF file

What file sizes are supported?

In theory, any size; real capability depends on your device and browser:

Small PDFs (few MB): very fast, almost no delay
Medium PDFs (tens of MB): slightly longer processing time
Large PDFs (hundreds of MB+): may take longer; use a powerful device

For very large files, consider merging in smaller batches for best experience.