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When you share a project link like https://share.streampixel.io/{projectId}, viewers get a fully working frontend with built-in handlers for messages from your Unreal app. You don’t need to write any frontend code to use these — they’re handled automatically.

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What the default frontend handles

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Sending data from your page to UE (URL params)

If you only need to pass values once at session start, append them as query params to the share URL — no frontend code needed.
UE receives:
See Frontend side messaging for the full URL syntax and the URL Generator tool.

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When to leave the default frontend

The default frontend is enough for most demos, configurators, and simple interactive experiences. Move to a custom frontend only when you need:

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Next

JSON messaging

All three communication paths compared: URL params, iframe, SDK.

Branding

Customize logo, splash, and loading messages on the default frontend.