How do I merge PDF files for free?

Click or drag your PDF files onto our merger. Reorder them using the arrows, then click Merge. Your combined PDF downloads instantly — files never leave your browser.

Is it safe to merge PDFs online?

Yes. Our PDF merger runs entirely in your browser using JavaScript. Your files are never uploaded to any server, so your documents stay completely private.

How many PDFs can I merge at once?

There is no hard limit. You can merge as many PDF files as your browser memory allows — typically dozens of files with hundreds of pages each.

PDF Merger

Merge multiple PDF files into one document. Free online PDF combiner.

Related:PDF Splitter PDF Compressor

Click or drag PDF files hereSelect multiple files at once

How to Merge PDF Files

Upload two or more PDF files by clicking the upload area or dragging files onto it. Rearrange the order using the up and down arrows. Click the Merge button to combine all files into a single PDF document. The merged file downloads automatically to your device.

Why Use Our PDF Merger?

Unlike other online tools, our PDF merger never uploads your files to a server. All processing happens locally in your browser using the pdf-lib library. This means your confidential documents stay private, and merging is instant regardless of your internet speed.

Frequently Asked Questions

How do I merge PDF files for free?: Click or drag your PDF files onto our merger. Reorder them using the arrows, then click Merge. Your combined PDF downloads instantly — files never leave your browser.
Is it safe to merge PDFs online?: Yes. Our PDF merger runs entirely in your browser using JavaScript. Your files are never uploaded to any server, so your documents stay completely private.
How many PDFs can I merge at once?: There is no hard limit. You can merge as many PDF files as your browser memory allows — typically dozens of files with hundreds of pages each.