3d Brain Atlas Reconstructor (3dBAR, http://www.3dbar.org) is a software package for automated reconstructing of three-dimensional models of brain structures from 2-D delineations of varying sophistication and quality. 3dBAR uses automatic, customizable and reproducible workflow which allows a user to track and review the whole reconstruction process as well as locating and eliminating reconstruction errors or data inconsistencies.

3dBAR also works as an on-line service (http://service.3dbar.org) offering a variety of functions for the hosted datasets:

• downloading reconstructions of desired brain structures in predefined quality levels in various supported formats as well as created using customizable settings,
• previewing models as bitmap thumbnails and (for webGL enabled browsers) interactive manipulation (zooming, rotating, etc.) of the structures,
• downloading slides from available datasets as SVG drawings.

3dBAR service can also be used by other websites or applications to enhance their functionality.