# Testing IFX locally on Windows

You can create a collection of IFX in the ENGAGE SDK, and then test it in the ENGAGE app. However, the IFX are restricted to your development machine. Other users in a Session will not be able to see the IFX.

To test your IFX on a Windows device, complete the following steps:

1. Build an asset bundle for the Windows platform. For more information, see [building-bundles-ifx](https://docs.engagevr.io/developer/creating-ifx/building-bundles-ifx "mention").
2. Open the ENGAGE app, and then log in.
3. Start a Session.
4. Open your menu, and then select **IFX**.
5. Press F10.
6. In the **Test Local IFX Bundle** window, select **BROWSE**.
7. In the **Select Local IFX Bundle** window, browse to and select your IFX bundle, and then select **Open**. After you build an asset bundle, it's saved in the `/AssetBundles/Windows` subfolder of your local SDK repository folder.
8. In the **Test Local IFX Bundle** window, for the IFX that you want to test, select **LOAD**.

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You can use the profiling tools in ENGAGE to analyse your IFX and identify any performance issues. For more information, see [profiling](https://docs.engagevr.io/developer/profiling "mention").
{% endhint %}