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UAssetGUI

UAssetGUI is a tool for low-level examination and manual modification of Unreal Engine game assets.

Place
#7 of 25
Score
6.4
UAssetGUI's website

What UAssetGUI is

UAssetGUI is a tool for low-level examination and manual modification of Unreal Engine game assets. It supports .uasset, .umap, .usmap, .utoc, and .ucas files, as well as JSON. Pre-built binaries are available on the repository’s Releases page, alongside an experimental build from the latest commit. The graphical application is for Windows; Linux instructions use Wine. Command-line arguments can export and import UAssetAPI JSON without opening the GUI, and custom C# scripts can extend program behavior. Portable mode, available in v1.1.0 or higher, keeps configuration and saved mappings in a Data folder beside the executable. Version 1.1.0 added opening and saving .utoc and .ucas containers through built-in retoc integration. Release notes report support for Unreal Engine 5.6 and 5.7. The project uses the MIT License, which permits use, modification, distribution, sublicensing, and sale subject to its conditions; the software is provided without warranty. Its maintainer announced retirement from Unreal Engine modding and UAssetGUI development, while noting that others might contribute or release updates.

Good

  • Free and MIT-licensed
  • Supports asset files, containers, and JSON
  • C# scripts can extend behavior
  • Command-line JSON import and export
  • Portable mode is available in v1.1.0 or higher

Watch out

  • Linux use requires Wine
  • Some Unreal Engine 5 .pak support excludes IO store and Zen assets
  • Software is provided without warranty
  • Maintainer announced retirement from development

Who it suits

UAssetGUI suits users who need low-level access to Unreal Engine assets and are comfortable editing them manually. Windows users can run it directly; Linux users need the documented Wine route.

Verdict

UAssetGUI offers manual asset work, scripting, and container support for Unreal Engine files. Linux users must use Wine, and the maintainer’s retirement is relevant when considering future development.

Plans and prices

From UAssetGUI's own pricing page, checked 8 Oct 2026.

All about pricing
PlanPriceWhat it gives you
UAssetGUIFreeMIT-licensed software

The facts

Each one read from UAssetGUI's own pages, with the date it was checked.

What it does

Command line
Command-line arguments support tasks such as exporting assets to UAssetAPI JSON and importing JSON without opening the GUI.checked 8 Oct 2026
Compatibility limit
The v1.0.0.0-alpha.8 release notes say Unreal Engine 5 .pak support did not include IO store or Zen assets.checked 7 Oct 2026
Container integration
UAssetGUI supports opening and saving .utoc/.ucas containers through built-in integration with retoc.checked 8 Oct 2026
Container support
The v1.1.0 release added opening and saving .utoc and .ucas containers through built-in integration with retoc.checked 7 Oct 2026
Contributing
Issues about assets that fail binary equality must include test assets, except when the issue is unrelated to asset parsing.checked 8 Oct 2026
Contribution policy
The project says it does not accept AI-generated code, text, documentation, or other AI-generated assets in pull requests.checked 8 Oct 2026
Customization
UAssetGUI supports custom scripts written in C# to extend program behavior.checked 7 Oct 2026
Downloads
Pre-built binaries are available from the repository’s Releases page, with an experimental build published with each new commit.checked 8 Oct 2026
Extensibility
Custom scripts written in C# can extend the program’s behavior.checked 8 Oct 2026
Intended users
The repository describes the tool as for low-level, hands-on examination and modification of Unreal Engine game assets.checked 7 Oct 2026
License
The project is distributed under the MIT License, which permits use, copying, modification, distribution, sublicensing, and sale subject to its stated conditions.checked 7 Oct 2026
License and warranty
The software is distributed under the MIT License, which provides it “AS IS” without warranty.checked 8 Oct 2026
Limits
The README says Linux setup uses Wine, and the release notes identify some support as rudimentary or limited, including support for UE 5.4/5.5 in an earlier release.checked 8 Oct 2026
Maintainer status
In the v1.0.0.0-alpha.8 release notes, atenfyr announced retirement from Unreal Engine modding and UAssetGUI development, while noting that future contributions and releases might come from others.checked 7 Oct 2026
Portable mode
Portable mode stores configuration files and saved mappings in a Data folder next to the executable and is available from v1.1.0.checked 8 Oct 2026
Purpose
UAssetGUI is a tool for low-level examination and modification of Unreal Engine game assets by hand.checked 8 Oct 2026
Support
The project invites bug reports through its issues page and says reports for assets that fail binary equality need sample assets, game name, Unreal Engine version, and mappings file if needed.checked 7 Oct 2026
Unreal Engine versions
The v1.1.0 release notes report support for Unreal Engine 5.6 and 5.7.checked 8 Oct 2026

Where it runs

Linux
The project describes Linux setup through Wine and lists Wine 11.0 as the version used to test the instructions.checked 7 Oct 2026
Linux support
The project documents running the Windows executable on Linux through Wine and lists tested setup steps.checked 8 Oct 2026

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