Merge PDF

Combine multiple PDF files into one document in the exact order you want online instantly.

Drop PDF files here

or click to browse — select multiple files

All processing happens locally on your device — your files are never uploaded to any server.

How to Merge PDF Files

Combine multiple PDF files into one clean document seamlessly. No limits, totally free.

1. Upload PDFs

Drag and drop your PDF files into the box. You can upload as many files as you want.

2. Reorder Files

Drag the files around to change the order they will appear in your final combined PDF document.

3. Merge & Download

Click "Merge". We will instantly stitch your files together and download the result to your device.

Frequently Asked Questions

Combining PDFs shouldn't require uploading your sensitive business documents to an unknown server. RunOnLocal processes your merges entirely on your own device.

Is my data private and secure?

Yes, absolutely 100%. By utilizing modern local browser technologies, we process your files directly on your computer or phone. No servers, no uploads, no compromises.

How fast is the processing?

Because there are no uploads or downloads to a remote server, processing is virtually instant. Even large PDF files are processed in milliseconds without eating up your network bandwidth.

Can I reorder the files?

Yes! Once you upload your PDFs, you can drag and drop them to easily arrange them in any order before merging.

Are there any limits or watermarks?

Enjoy completely unrestricted access to the tool! You can use it an unlimited number of times for free. We never artificially cap your file sizes, demand subscriptions, or ruin your final documents with unwanted branding or watermarks.