Merge PDF
Combine multiple PDFs into one file. Files stay on your device — nothing is uploaded.
Methodology & standardsRuns on your device
Inputs
Results update liveAdd PDF files
or drag and drop here
PDF only · up to 100 MB per file · processed locally in your browser
Related tools
Adjacent decisions
FAQ
Frequently asked questions
How the calculation works and where its limits are.
Are my PDFs uploaded to a server?
No. Merge PDF runs entirely in your browser using local processing.
How many files can I merge?
Up to 20 PDFs per session, within the browser memory limits shown on the upload area.