Unreal Engine Blueprint Viewer for Visual Studio Code
Visual Studio Code custom editor extension to inspect and navigate Unreal Engine Blueprint (.uasset) graphs directly inside your editor.
Highlights
- ⚡ Zero External Setup (In-Process WASM): Parses binary
.uasset files directly inside VS Code via embedded WebAssembly (.NET / CUE4Parse). No backend server, Docker container, or Unreal Engine installation required.
- 🔒 100% Local & Secure: Your assets never leave your machine. No telemetry, no external API requests, and zero network data transfer.
- 🎨 Familiar Blueprint Visuals: Powered by the official blueprintUE renderer. Accurately displays node pins, execution flows, comments, and data links.
- 🧭 Interactive Canvas: Smooth pan, zoom, and node dragging.
- 📑 Multi-Graph Switching: Effortlessly toggle between Event Graphs, Construction Scripts, Functions, Macros, and Widget event graphs via the integrated graph selector.
- 🧩 Automatic Asset Pairing: Automatically discovers and loads companion
.uexp (export data) and .ubulk files located alongside .uasset files.
Getting Started
- Install the extension from the VS Code Marketplace or package as
.vsix.
- Open any workspace containing Unreal Engine project files.
- Click on any
.uasset Blueprint file in the File Explorer.
- The graph renders automatically in a custom editor tab.
Switching Graphs
When an asset contains multiple graphs (e.g., EventGraph, Construction Script, Functions):
- Use the Graph dropdown selector in the top-right toolbar to switch graphs instantly.
Alternative Editors
To open the file with another editor (e.g., binary or hex viewer):
- Right-click the file tab and choose Reopen Editor With... (
View: Reopen Editor With...).
Controls
| Action |
Control |
| Pan Canvas |
Right-click drag or Middle-click drag |
| Zoom In / Out |
Mouse wheel scroll |
| Move Node |
Left-click drag on node header |
| Switch Graph |
Top-right toolbar dropdown |
Compatibility
Supported Unreal Engine Versions
- Unreal Engine 4: 4.27
- Unreal Engine 5: 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8
Supported Asset Types
- Blueprint Class (
.uasset + .uexp)
- Widget Blueprint Class (UMG)
- Actor, Component, and GameMode Blueprints
Architecture & Privacy
This extension operates entirely client-side within VS Code Webviews:
- Parsing Engine: C# / .NET compiled to WebAssembly (WASM), utilizing a tailored CUE4Parse pipeline.
- Renderer: Standalone blueprintUE canvas runtime isolated within sandboxed Webview contexts.
- Zero Network Footprint: Operates completely offline with strict Content Security Policy (
CSP).
License
MIT License.
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