A common way of scanning two-sided documents with a single-sided scanner is to first scan the front (odd) pages, then scan the back (even) pages, and finally combine the two scanned documents. The tool below automates the third step: use it to quickly merge front and back PDF scans online.
Your PDF files stay private: they are processed locally in your browser and never sent to a server.front,
odd,
back, or
even(for example
scanned document front.pdf).