The XrmToolBox Metadata Browser is an XrmToolBox plugin tool that allows you to browse metadata in the Dynamics 365 application. To use it, open XrmToolBox and select Metadata Browser:
Opening the tool will display several attributes of an entity:
You can add and remove these columns by selecting Columns.
Selecting an entity will display it’s details:
As well as:
The source code is located at: https://github.com/MscrmTools/MsCrmTools.MetadataBrowser