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Thread: Unity Assets Bundle Extractor

  1. #1
    Zombie Hunter DerPopo's Avatar
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    Unity Assets Bundle Extractor

    Ancient version 1.0 screenshot
    Screenshot.PNG

    Unity Assets Bundle Extractor (UABE) is a stylish tool that allows editing asset bundles and .assets. It can export .assets files from bundles, import them back, modify most asset formats with plugins and dumps with type information and create a standalone installer from the modifications.
    I tested this tool with 7 Days to Die's bundles but let me know if you encounter any bugs or if you have suggestions.

    I included a 32bit and a 64bit version although it doesn't use much memory.
    Installers created with the 64bit version can't be used on 32bit systems but an installer package can be exported from the 64bit version and imported in the 32bit version to create a 32bit installer.

    Old changelog : here

    Changes in 2.1 :
    • Add Unity 5.5 (format 16/17) .assets file support.
    • Add Unity 5.5.0f3 type database.
    • Fix hidden assets added with File->Add when closing the asset list and pressing Info again (for bundles) or when loading an installer package.
    • Add a dependency view dialog (View->Dependencies) that lists all listed .assets files with their absolute File IDs and their direct dependencies with relative File IDs.
    • Improve support for split .assets files, .split0 files can now be opened directly.
    • Add support for BC4,BC5,BC6H and BC7 texture formats (added in U5.5) with different compression settings and decompression.
    • Add file name suggestions for asset export options.
    • Fix writing some format 6 AssetBundles with UnityWeb header and flag 0x100 set.
    • Add a SubstanceArchive plugin that can export .sbsasm files but not the .xml file.
    • Calculate type hashes and fill out type tree when adding new asset types to format 16/17 files.
    • Small TextAsset plugin fixes.
    • Fix a possible crash when resolving a conflict caused by an installer package import in the installer maker.
    • API: Remove two console outputs in MakeTextureData and GetTextureData.
    • Fix exporting dumps of MonoBehaviours with no type tree stored in the .assets file.
    • Fix some potential issues when trying to locate streamed resources.

    Change in 2.1b :
    • Fix a bug in writing the type information of Unity 5.5 .assets files.

    Change in 2.1c :
    • Fix another bug in reading and writing the type information of Unity 5.5 .assets files.

    Change in 2.1d :
    • Fix another bug in writing the type information of Unity 5.5 .assets files.
    • Fix a bug causing the last character of strings in asset dumps before \n or \r to be cut off.
    • Fixed the suggested file path name for the XP dialog fallback.
    • Improved performance of batch dump export.
    • Fix a bug causing ResourceManager names to be applied to File ID 0's assets if the dependent .assets file that gets the name isn't loaded.


    If you have no forum account but want to give me feature requests or want to report bugs, you can use the github page.

    By downloading and/or using this software, you agree to the terms of its license ("human-readable summary").

    Old releases : here
    API Releases :
    1.9 API (here or here)
    2.0 API (here or here)
    2.1b API (here or here)
    2.1c API (here or here)
    Sample Plugin (here or here)
    2.1d API (here or here)

    Releases :

    2.0 (32bit : here or here, 64bit : here or here)
    7dtd UMAMesh plugin for 2.0 (here or here)
    2.0b bugfix, download 2.0 first (32/64bit : here or here)
    2.1 (32bit : here or here, 64bit : here or here)
    2.1b bugfix, download 2.1 first (32/64bit : here or here)
    2.1c bugfix, download 2.1 first (32/64bit : here or here)
    2.1d bugfix, download 2.1 first (32/64bit : here or here)
    New type package with 5.6.0f3 : here or here
    Last edited by DerPopo; 04-03-2017 at 08:42 PM. Reason: 2.1d and 5.6.0f3 database

  2. #2
    Colony Founder Pacco's Avatar
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    Hi, I tried it butit always says unknown unable to read Bundle file! (invalid file or unknown version?)
    Tried to open the resources.asset.

  3. #3
    Reconstructionist Curbolt's Avatar
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    Quote Originally Posted by Pacco View Post
    Hi, I tried it butit always says unknown unable to read Bundle file! (invalid file or unknown version?)
    Tried to open the resources.asset.
    As i understand this program unpacks the asset files from the Bundles Folder > BlockTextureAtlases and TerrainTextures > These files can be opened with UAE.

    I tested the tool and it works. Thx @ DerPopo

  4. #4
    Reconstructionist grimreefer24601's Avatar
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    Awesome work DerPopo. Thanks for looking into this for me. Would you mind if I post a link in some other forums? I'll make sure you get full credit.

  5. #5
    Survivor
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    Good Work DerPopo

  6. #6
    Zombie Hunter
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    Cam i beg for an explaining this for some one, who arent familiar at the programing? What this does? how it works step by step?

    Thnx for the reply =)

  7. #7
    Zombie Hunter DerPopo's Avatar
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    Quote Originally Posted by Con Agni View Post
    Cam i beg for an explaining this for some one, who arent familiar at the programing? What this does? how it works step by step?

    Thnx for the reply =)
    This tool extracts .assets files from assets bundles (like BlockTextureAtlases) so you can view them with UAE.
    To extract an .assets file, just press File->Open, select the file, press Export and select the output file.
    To import an .assets file, do the same steps as above but press Import.
    7 Days to Die's block textures are stored in these assets bundles so this allows you to edit them.

    Quote Originally Posted by grimreefer24601 View Post
    Awesome work DerPopo. Thanks for looking into this for me. Would you mind if I post a link in some other forums? I'll make sure you get full credit.
    Of course, feel free to post a link.

  8. #8
    Colony Founder Wsiegel's Avatar
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    Great Job DerPopo, +1 I had a feeling you would crack this given enough time.

  9. #9
    Colony Founder Razzoriel's Avatar
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    Does it work with audio and/or meshes?

    Can it be used to edit existing assets?

  10. #10
    Zombie Hunter
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    Quote Originally Posted by DerPopo View Post
    This tool extracts .assets files from assets bundles (like BlockTextureAtlases) so you can view them with UAE.
    To extract an .assets file, just press File->Open, select the file, press Export and select the output file.
    To import an .assets file, do the same steps as above but press Import.
    7 Days to Die's block textures are stored in these assets bundles so this allows you to edit them.

    Thnx for the reply, and i need to ask another favor, if i did the export, after what need i use, to actualy see the files, and "makes some sense" for a beginner like me. I just can humbly say thnx, for the great community, how they keep us "feed" and help, and still give help to the greens to

  11. #11
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    Quote Originally Posted by Con Agni View Post
    Thnx for the reply, and i need to ask another favor, if i did the export, after what need i use, to actualy see the files, and "makes some sense" for a beginner like me. I just can humbly say thnx, for the great community, how they keep us "feed" and help, and still give help to the greens to
    1. Start UABE
    2. select File-> open and browse for BlockTextureAtlases on my pc its C:\Program Files (x86)\Steam\SteamApps\common\7 Days To Die\Data\Bundles)
    3. Make sure Remove the Treetype is selected in UABE, click EXPORT and save the file as test.asset
    4. Open test.asset in UAE just as you would with sharedasset2.asset or any other asset file. (if you can't see the file make sure that UAE looks for all files instead of just *.asset if you just saved it as test)

  12. #12
    Zombie Hunter DerPopo's Avatar
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    Quote Originally Posted by Razzoriel View Post
    Does it work with audio and/or meshes?

    Can it be used to edit existing assets?
    This is no .assets file editor, it's a tool that extracts .assets files from bundles (like BlockTextureAtlases) so you can edit it with UAE.

  13. #13
    Zombie Hunter DerPopo's Avatar
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    Here's some eye candy :

    I have made a tree view for assets that uses the type information in asset bundle files. I tested it with multiple Unity 4 and Unity 5 asset bundle files and different asset file formats and it works so far.
    I will add an option to load .assets files to view the asset data of these.

  14. #14
    Zombie Hunter DerPopo's Avatar
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    I have released v1.3. It can show the data of assets in a tree view and now also opens the asset list for .assets files outside a bundle file.
    I am planning to add an export/import button for assets that also allows to read and write type tree dumps.

  15. #15
    Colony Founder Pacco's Avatar
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    Great!!

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