SharePoint Designer design library file
File type: Various data file
The .spdesigndoclib file extension identifies a design library data file used by Office SharePoint Designer.
The file belongs to Microsoft's tools for creating and modifying SharePoint sites and web pages.
File type category:
Various data file
Date updated: September 27, 2026
Office SharePoint Designer is a Microsoft Windows application for designing and editing SharePoint sites and web pages. An .spdesigndoclib file contains design library data used by the application.
This is application-specific data associated with a SharePoint Designer design library, rather than a general-purpose document or standalone web page. Its contents are intended to be managed as part of the related SharePoint Designer environment.
Office SharePoint Designer is legacy Windows software, and the .spdesigndoclib format is not a current cross-platform format.
On Windows, open the file with Office SharePoint Designer. The file may be an internal library data file rather than a document intended to open independently, so double-clicking it may not display its contents.
If it does not open directly, start SharePoint Designer and access the associated SharePoint site or design library through the application.
The .spdesigndoclib format is application-specific library data and is not intended for routine conversion to another document format.
To reuse its contents, open the associated SharePoint site or design library in Office SharePoint Designer on Windows and publish or copy the relevant design items using the application's supported site-management features.
Software applications that handle other tasks involving spdesigndoclib files:
Microsoft Windows
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