The File Extensions Database

.OIS File Extension

  • Developer by: OriginLab
  • Category: Settings Files
  • Format: XML

What is an .OIS file?

.OIS is Origin Analyses Theme File

An OIS file is a theme file created by Origin, a data analysis and graphing application used by various scientists and engineers. It contains settings in XML format that customize the appearance of one or more analyses windows that appear in Origin.

You most likely will never encounter an OIS theme file when using Origin. The file is not meant to be opened by the user. Instead, it stores the settings that are referenced by Origin for analyses.

NOTE: OIS files are typically located in the "AnalysisAndReportTable" folder of the C:\Program Files\OriginLab\Origin\Themes installation.

Programs that open Origin Analyses Theme File
OriginLab Origin

How to solve problems with OIS files

  • Associate the OIS file extension with the correct application. On :
    Windows: Right click on any OIS file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.OIS files". Mac: Right click (or Ctrl-click) the OIS file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .OIS is Origin Analyses Theme File. Because only the current version supports the latest OIS file format. Search, therefore, e.g. on the OriginLab manufacturer website after an available .OIS is Origin Analyses Theme File update.
  • To make sure that your OIS file is not corrupted or virus-infected, get the file again and scan it with antivirus software.