Offline Tool

Merge PDF Files

Combine multiple documents into one file securely. Processing happens in your browser—no uploads.

Select PDF Files

or drag and drop them here

How to Combine PDF Files

1

Select Files

Tap "Choose Files" to select the PDFs you want to combine from your Android, iPhone, or PC.

2

Reorder Pages

Use the Up/Down arrows to arrange your files in the correct order before merging.

3

Merge & Save

Click "Merge PDF" and the new file will be created instantly on your device.

Why use our PDF Merger?

100% Secure (Offline)

Files never leave your device. We use WebAssembly to process data in your browser RAM.

Mobile Friendly

Works perfectly on Android Chrome and iOS Safari without installing any apps.

FAQ

Is there a file size limit?

Since we process files on your computer, the limit depends on your RAM. Usually, you can merge very large files easily.

How do I change the order?

Once you select files, use the Up and Down arrows next to each file to rearrange them.

Secure Way to Merge PDF Files Offline on Android & PC

In today's digital workflow, the need to combine PDF documents without uploading them to a server is critical for privacy. Whether you are merging bank statements, medical records, or student assignments, sending files to a cloud server always carries a risk. That's why The PDF Mechanic offers a client-side solution that runs entirely in your browser.

Why Choose Client-Side PDF Merging?

Most "free PDF joiners" require you to upload your files. This is slow and uses your mobile data. Our tool uses advanced WebAssembly technology to merge PDF files offline on mobile. Once the page loads, you can turn off your internet, and the tool will still function perfectly. This makes it the fastest way to stitch PDF documents if you have a slow connection or limited data pack.

How to Join PDF Files on Android Without Apps

You don't need to install heavy apps from the Play Store to combine documents. Our tool is optimized for Android Chrome and iOS Safari. Just visit the website, select your files, and click merge. It is a lightweight alternative to Adobe Acrobat for simple tasks like organizing receipts or creating a single portfolio file.

Pro Tip

Since the processing happens on your device (RAM), this tool is incredibly fast for small to medium-sized files. For maximum privacy, you can even use this tool in Incognito mode to ensure no cache is left behind.

Common Uses: Merging invoices for tax returns, combining thesis chapters, joining scanned ID cards (Aadhaar/PAN) into one file, and organizing legal documents securely.