How to Convert Multiple ND2 Files to U3D?
1. Download and Install reaConverter
reaConverter is a standalone Windows app — download, install, and start converting ND2 files in under two minutes.
2. Load your ND2 files
Load ND2 files into reaConverter directly. There is no size limit and nothing is uploaded, which matters for slide scans and long time series.
Use drag-and-drop, folder browser, or right-click conversion from Explorer.

3. Select U3D as output format
Choose U3D and set a destination folder. Resolution and quality settings are worth a look here, since the output is what colleagues and reviewers will actually see.

4. Start ND2 to U3D conversion
Click Convert to start the batch. reaConverter processes files quickly and shows you the status of each one.

Once done, reaConverter shows a summary. Click 'Show converted files' to jump straight to your U3D output.









