SharePoint Designer file
File type: Various data file
A .spdesignfile file is a SharePoint Designer file used by Microsoft Office SharePoint Designer.
It stores design-related data for work on Microsoft SharePoint sites and web pages.
File type category:
Various data file
Date updated: September 27, 2026
The .spdesignfile file extension is associated with Microsoft Office SharePoint Designer, a specialized Microsoft HTML editor and web design program for creating and modifying SharePoint sites and web pages.
The file contains data used by SharePoint Designer as part of a site design or other design-related work. It belongs to the SharePoint Designer environment rather than being a general-purpose HTML document.
Microsoft Office SharePoint Designer runs on Microsoft Windows. The software is discontinued, so this is a legacy format and may require a compatible installation of SharePoint Designer to use.
Open the file with Microsoft Office SharePoint Designer on Microsoft Windows. If the file does not open by double-clicking it, start SharePoint Designer and use its Open command.
Because the format is tied to a discontinued Microsoft application, current Windows installations may not have a compatible program available.
The .spdesignfile format is intended for use within SharePoint Designer rather than for direct conversion to a standard document format.
Open the file in a compatible version of SharePoint Designer and use that program's site or page publishing and export features where available.
Software applications that handle other tasks involving spdesignfile files:
Microsoft Windows
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