Are my PDF files sent to a server?

No. PDF merging is performed entirely inside your browser using the pdf-lib JavaScript library. Your files never leave your device.

Can I merge password-protected PDFs?

No. Password-protected or encrypted PDFs cannot be loaded by the browser. You must remove the password protection first before merging.

PDF TOOLEssential

Merge PDF Files

Combine multiple PDF documents into one organized file. Arrange pages in your preferred sequence and merge them instantly in your browser with zero server uploads.

Processed inside browser

•No Sign-up•100% Free Forever

Tap to choose or upload fileDrag & drop your file here

Add up to 20 PDF files (up to 250MB total). Arrange them in order before merging.

Browse from Device

Tip: You can also paste an image withCtrl+V

Key Features & Performance

Combine up to 20 PDF files into one document

Reorder files with up/down controls before merging

100% browser-based using pdf-lib — no server uploads

Supports password-free PDF documents

How to Use Merge PDF in 3 Simple Steps

1Step 01

Add Your PDFs

Upload two or more PDF files using the drop zone or the file browser.

2Step 02

Arrange the Order

Use the up and down arrows to sort your PDFs into the correct sequence.

3Step 03

Merge & Download

Click 'Merge PDFs' and download the combined PDF document instantly.

Why Use Our Merge PDF?

Unlike traditional file conversion portals that upload your private files to unknown third-party cloud servers, ToolDolfen leverages client-side browser computing. Your computer or phone processes the data directly, giving you complete privacy and instant completion speeds.

Zero Server Uploads

Files remain inside your device memory. Zero risk of data leak, profiling, or unauthorized inspection.

Zero Latency Speed

No network upload waiting times or server queue delays. Processing begins instantaneously in your browser.

Frequently Asked Questions

Key details about Merge PDF and privacy assurances

You can merge up to 20 PDF files at once. Each file can be up to 20MB in size.

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