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Merge PDF

100% Client-Side

Merge PDF lets you combine multiple PDF documents into a single, unified file. The tool runs entirely in your browser using modern Client-Side JavaScript (pdf-lib.js). When you select your files, the engine reads their binary streams, compiles the page trees, and appends them sequentially. The process is instantaneous and offline.

Open Merge PDF

How It Works

1

Select PDFs

Choose two or more PDF files from your computer, tablet, or smartphone to begin.

2

Arrange Order

Drag and drop file rows in the queue to arrange them in the exact order you want them merged.

3

Merge & Download

Click the Merge button to compile the files instantly and download the final unified document.

Frequently Asked Questions

Is there a limit on the number of PDFs I can merge?

No, WeConvertFiles does not impose any file count or upload limit caps. You can select and combine as many PDF documents as you need in a single action.

Are my merged files uploaded to a server?

Absolutely not. All file merging operations are completed locally inside your web browser. No document data is transmitted over the network.

Does this tool preserve the quality of my original PDFs?

Yes. The merging algorithm copies the page objects directly from the source streams without modifying vector paths, text fields, fonts, or images.