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Merge PDF Files Online Free

Combine multiple PDF files into one. Upload any number of PDFs, drag to reorder them, then download the merged file. No upload to server, no watermark, completely free.

✓ No Server Upload ✓ No Watermark ✓ Unlimited Files

1 Upload PDF Files

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Drag & Drop PDF files here

Add as many PDFs as you need — one at a time or all at once

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How to Merge PDF Files Online for Free

Our PDF merger uses PDF-lib, a pure JavaScript library, to combine your PDF files entirely in your browser. No file is sent to any server — all merging happens locally on your device. This means your documents are completely private, and there is no size limit beyond your device's available memory.

Common Use Cases for Merging PDFs

Merge multiple mark sheets into one document for job applications · Combine scanned pages of a certificate · Join multiple chapters of a study guide · Merge all pages of a government form into one submission file · Combine front and back scans of a document.

How many PDF files can I merge at once?

There is no hard limit on the number of files. You can merge 2 files or 50 files. The only limit is your device's available RAM. For very large merges (50+ large PDFs), we recommend using a desktop browser.

Will the merged PDF have a watermark?

No watermarks are ever added. The output is a clean, standard PDF file with all your pages combined exactly as you arranged them.

Are my files safe? Do you store them?

All merging happens in your browser using JavaScript. Your files are never uploaded to our servers or any third-party server. Everything is processed locally and cleared when you close the tab.