Merge PDF Files Online
Combine two or more PDF documents into one file in a chosen order.
Use the tool
Start the interactive tool on the main PDF Engine page. Selected files are processed in your browser for supported operations.
How to use Merge PDF
- Select at least two PDF files.
- Use the order controls to arrange the files.
- Run Merge PDF, download the result, and check the page order.
When it is useful
Merge is useful for combining invoices, reports, application documents, class notes or scanned pages into one shareable file.
Important limitations
The browser must have enough memory to load every source file. Encrypted, damaged or unusually complex PDFs may fail. Keep original files until the merged copy is checked.
Privacy and file handling
This tool is designed to process supported files locally in your browser; the static website does not provide server-side file storage. Your browser still downloads the JavaScript libraries required for some operations from third-party content delivery networks. See the Privacy Policy for details. Do not use the output without checking it, and keep your original file.
Frequently asked question
The tool copies pages into a new PDF; it does not intentionally upload files to a PDF Engine server.
Read our detailed merge PDF guide for step-by-step instructions and quality checks.
Need a different operation? Browse all PDF Engine tools or read our PDF guides.