Left hand pane showing a list of all bundles in the project. The window is broken into three sections: Bundle List, Asset List, and Asset Details.

To force a quick pass at error detection, or to update the tool with changes made externally, hit the Refresh button in the upper left. It does what it can to stay in sync with the project, but cannot always be aware of activity outside the tool. When first opened, the tool will parse all bundle data in the background, slowly marking warnings or errors it detects. This window provides an explorer like interface to managing and modifying asset bundles in your project.

Note: this utility is in a pre-release state, and accordingly we recommend creating a backup of your project before using it. The bundle configuration and build functionality are split into two tabs within the new window. It will create a new menu item in Window > AssetBundle Browser. It can be dropped into any Unity project with a version of 5.6 or greater. Use this tool as an alternative to selecting assets and setting their asset bundle manually in the inspector. It also provides basic build functionality. It will block editing that would create invalid bundles, and inform you of any issues with existing bundles. This tool enables the user to view and edit the configuration of asset bundles for their Unity project. To access it, you have to download it from GitHub and install it separately from the standard Unity Editor’s download and install. NOTE: This tool is extra functionality to Unity’s standard functionality.

Unity assets bundle extractor online