Utility
Merge PDF
Drop PDF files here, or
Accepts PDF only — add two or more files
Your files are never uploaded. All merging runs locally in your browser.
Frequently asked questions
How many PDF files can I merge at once?
There is no fixed limit. Processing is done in your browser, so very large or numerous PDFs may take a moment depending on your device memory and CPU.
Does merging PDFs affect the quality of the content?
No. The tool copies pages directly from each source PDF without re-encoding them, so the original content quality is preserved exactly.
Are my PDF files uploaded to a server?
No. All merging is performed locally in your browser using the open-source pdf-lib JavaScript library. Your files are never sent to any server.