2D is a rare extension used for storing images created with Amapi, an application for designing 2-D and 3-D models used by architects, engineers or product designers. The 2D format is compatible with few image viewers and editors, so handling it normally requires its conversion to a more widely used format.
The quick and simple way to handle your files is to get a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch conversions. As you will soon realize, reaConverter will help you avoid spending countless hours trying to figure out how to convert multiple 2D files as once.
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