# What are the file extensions for HOOPS Communicator/Stream Cache files?

**URL:** https://forum.techsoft3d.com/t/what-are-the-file-extensions-for-hoops-communicator-stream-cache-files/46
**Category:** HOOPS Visualize Web
**Created:** [July 3, 2019, 7:00am UTC](https://forum.techsoft3d.com/t/what-are-the-file-extensions-for-hoops-communicator-stream-cache-files/46 "2019-07-03T07:00:00Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![rbeyer1](https://avatars.discourse-cdn.com/v4/letter/r/fbc32d/32.png) [@rbeyer1](https://forum.techsoft3d.com/u/rbeyer1)
#### Post date: [July 3, 2019, 7:00am UTC](https://forum.techsoft3d.com/t/what-are-the-file-extensions-for-hoops-communicator-stream-cache-files/46/1 "2019-07-03T07:00:00Z")

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**There are two primary file types generated by HOOPS [Communicator](https://docs.techsoft3d.com/communicator/latest/build/api_ref/libconverter/namespaceCommunicator.html). An .scs file is a compressed and standalone file containing all of the 3D model data. It is not streamable by the server and will be loaded by the viewer directly via an http request. An .scz file is a single file containing all model data in a streamable form. Its a single file version of a stream cache directory.**