How does the PDF merger work?

Upload multiple PDF files, arrange them in the desired order, and click Merge. The tool uses the pdf-lib library to combine all pages into a single PDF document entirely in your browser.

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

There is no strict limit. You can merge as many PDF files as your browser memory allows. For very large files, processing may take a few seconds.

Are my PDF files uploaded to a server?

No. All processing happens entirely in your browser using JavaScript. Your PDF files never leave your device and nothing is stored on any server.

Can I reorder the PDFs before merging?

Yes! You can drag and drop files to rearrange them, or use the up and down buttons to change the order before merging.

What is the output format?

The merged output is always a standard PDF file that is compatible with all PDF readers. The original formatting, fonts, and images are preserved.

PDF Merger

Combine multiple PDF files into one document. Drag and drop to reorder pages. All processing happens in your browser — your files are never uploaded to any server.

Drag & drop PDF files here or click to upload

Select multiple PDF files to merge

What Is a PDF Merger?

A PDF merger is a tool that combines multiple PDF documents into a single file. It is commonly used to consolidate reports, contracts, invoices, or any documents that need to be shared or archived as one file.