Microsoft Office SharePoint Designer file
File type: Various data file
An spdesignjs file is a data file used by Microsoft Office SharePoint Designer.
It belongs to the application's SharePoint site design and editing workflow rather than representing a general-purpose document.
File type category:
Various data file
Date updated: October 4, 2026
Record marked as obsolete and not updated for a long time.
The spdesignjs file extension is associated with Office SharePoint Designer, Microsoft's discontinued freeware HTML editor for creating and modifying Microsoft SharePoint sites.
An spdesignjs file stores data used by Office SharePoint Designer. It is an auxiliary file for the application and may depend on the SharePoint site or project with which it was created.
Office SharePoint Designer was available for Microsoft Windows. The format is obsolete because the software has been discontinued.
Use Office SharePoint Designer on Microsoft Windows to work with an spdesignjs file. The file may be intended for use by the application rather than for direct opening as a standalone document.
Because the spdesignjs file stores data used by Office SharePoint Designer, it may not have meaningful content outside that application's SharePoint site workflow.
Where possible, open the related site or project in Office SharePoint Designer and use the application's own publishing or export features instead of converting the file directly.
Software applications that handle other tasks involving spdesignjs files:
Microsoft Windows
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