#ue4 #unreal

bin+lib uasset

Parsing of Unreal Engine asset files (uassets)

9 unstable releases

0.5.0 Sep 18, 2023
0.4.1 Jun 18, 2022
0.3.0 May 27, 2021
0.2.1 May 24, 2021
0.1.3 May 24, 2021

#271 in Game dev

Download history 3/week @ 2023-06-07 5/week @ 2023-06-14 16/week @ 2023-06-21 19/week @ 2023-06-28 4/week @ 2023-07-05 4/week @ 2023-07-12 6/week @ 2023-07-19 26/week @ 2023-07-26 8/week @ 2023-08-02 4/week @ 2023-08-09 14/week @ 2023-08-16 13/week @ 2023-08-23 4/week @ 2023-08-30 20/week @ 2023-09-06 26/week @ 2023-09-13 19/week @ 2023-09-20

70 downloads per month



Build status Crate API License: MIT License: Apache 2.0


uasset supports parsing .uasset files from Unreal Engine in pure Rust, to aid in building tools that reason about Unreal assets without needing to boot up an entire editor. Most of the format has been gleaned from Unreal Engine's own parsing code, which you can find in the official UnrealEngine repo if you have permission. (Specifically, a lot of it was informed by PackageFileSummary.h and PackageFileSummary.cpp).

It's designed to work with Unreal Engine assets as old as 4.10 (but might work farther back -- let me know!), and it's intended to be updated to work with the latest engine version (at time of writing, that is 4.26).


You can find details on how to use it in your project in the documentation on docs.rs.


Whenever there's a new Unreal version released, uasset-rs most likely needs to be updated to support the new version. If you're interested in contributing, you can see UNREAL_UPGRADES.md for a quick overview of what that process looks like for me.


uasset-rs is licensed under either of

at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.


~128K SLoC