The first release of the Asset Bundle Browser is now available as an open-source editor extension here: https://github.com/Unity-Technologies/AssetBundles-Browser. It is still very early in its life, so we recommend backing up your project before using it. All feedback is welcome. For full documentation, see the included README, otherwise see the high level overview below. Overview This tool enables the user to view and edit the configuration of asset bundles for their Unity project. It will block editing that would create invalid bundles, and inform you of any issues with existing bundles. It also provides basic build functionality. This tool is intended to replace the current workflow of selecting assets and setting their Asset Bundle manually in the inspector. It can be dropped into any Unity project with a version of 5.6 or greater. It will create a new menu item in Window->AssetBundle Browser. The bundle configuration and build functionality are split into two tabs within the new window. Configuration The configuration window shows you a list of all bundles in your project. You can select bundles to see their asset lists, and select assets to see their details. You can drag bundles and assets around within this utility to change bundle assignment, as well as drag assets in from the Project Explorer. Build The Build tab provides basic build functionality to get you started using asset bundles. In most profressional scenarios, users will end up needing a more advanced build setup. All are welcome to use the build code in this tool as a starting point for writing their own once this no longer meets their needs. Please reply to this post or add tickets to the github page with any questions, bugs, or feature requests.