Merge PDF Files Online
Select two or more PDFs and combine them into one file in their selected order.
Process your PDF
PDF only · Up to 35 MB per file · Combined limit 100 MB · Browser processing.
Download PDFChoose PDF files to begin.
About Merge PDF Files Online
Select two or more PDFs and combine them into one file in their selected order. The editing happens locally in your browser. There is no account required, and ZM does not receive or store your PDF contents. Processing may take longer on mobile devices or with large files.
Does merging change the PDF content?
Pages are copied into one output PDF. Some advanced PDF features may not be preserved.
Are my PDFs uploaded to your server?
No. Files are read and processed locally by JavaScript inside your browser. The libraries must first load from the content delivery network.
Is this tool completely free?
Yes, the core PDF operation is free and does not require a subscription.