What is a OCC file?
The .OCC file extension is primarily used for OMICRON Control Center files created by the OMICRON Test Universe software. These files contain protection relay test documents. Interestingly, these specific .OCC files use the standard DOC file format structure internally to manage test data.
The .OCC extension has multiple possible meanings depending on the software context. Occipital uses the extension for 3D scanner data recordings captured by the Occipital Structure Core and Sensor. Classic video games like Splinter Cell: Chaos Theory and Onimusha: Warlords use .OCC files to store game sound occlusion data. It is also known as an Oceanic DataPool File created by the Oceanic Consulting Corporation.
How to open OCC files?
To natively open an OMICRON Control Center file, you need the OMICRON Test Universe software. If you have 3D scan data, use the processing software provided by Occipital. Game data files are proprietary and not intended for manual editing, but advanced modding tools or hex editors can sometimes extract the sound data.
Because .OCC files can contain completely different types of data, do not forcefully change the file extension.
Best practices and troubleshooting
If you receive an unknown .OCC file, do not immediately open it in a standard text editor unless you know its exact origin. Inspect the file header using a command-line tool like `file` on Linux or a basic hex viewer. If it shows an internal DOC signature, it belongs to the OMICRON system. If it is entirely binary, it might be a 3D scan or game asset.
Summary
viewer.online/occ analyzes .OCC files to identify their exact format and creator software, shows which programs can open the file, and usually previews it. Because primary .OCC files use the known DOC format, viewer.online/occ can safely open and display them online, eliminating compatibility problems. If your .OCC file has multiple possible meanings, we recommend using viewer.online/occ to identify the actual format of your file.