Combine & Merge PDFs

Securely merge, combine, and arrange multiple PDF files into one document layout instantly without uploading anything to a server.

Upload PDFs to Combine

Select multiple PDF files at once.

How to Merge PDFs for Free

Combining multiple PDF documents into a single fluid file shouldn't cost you a monthly subscription. Whether you are collating tax documents, joining portfolio pieces, or merging scanned book chapters, our PDF Merger can combine dozens of files instantly.

The Privacy Advantage

Almost all other free PDF merging tools (like Smallpdf or iLovePDF) require you to upload your files to their remote servers. This possesses a massive privacy risk for sensitive data. We utilize native browser runtime engineering (`pdf-lib`), which means the files are physically stitched together using your computer's RAM. No data is ever dispatched across the network.

How to use:

  1. Click the upload zone and select multiple `.pdf` files from your computer.
  2. Use the visual up and down arrows on each row to arrange the documents in your desired sequence.
  3. Click "Merge Selected PDFs" and your combined document will download automatically!

Frequently Asked Questions

Is there a file size limit?

Because the tool runs entirely on your local machine, the only limit is the available RAM on your browser tier. You can successfully merge hundreds of megabytes of PDF data.

Can I merge locked or encrypted PDFs?

If the PDF is strictly password-protected against modifications, the merger matrix cannot read the buffer stream and it will fail. You must unlock strict PDFs before merging.

About Combine & Merge PDFs

This is a free, fast, and fully client-side combine & merge pdfs tool. All processing is done locally within your browser to ensure maximum privacy and security. No data is sent to our servers. Bookmark this page for quick access to ad-free, high-performance SEO and developer utilities.