SharePoint Designer file
File type: Various data file
A .spdesigntxt file is a SharePoint Designer file associated with Office SharePoint Designer.
It contains text-based design data used while creating or modifying Microsoft SharePoint sites and web pages.
File type category:
Various data file
Date updated: September 27, 2026
Office SharePoint Designer is a Microsoft HTML editor and web design application for creating and modifying SharePoint sites and web pages. The SPDESIGNTXT file extension identifies text-based data used by that application.
This is an application-specific data file rather than a general-purpose document format. It belongs to the collection of files used by SharePoint Designer when working with SharePoint site content and design information.
The format is associated with the Windows version of Office SharePoint Designer and is now considered a legacy format. SharePoint Designer is no longer Microsoft's current tool for SharePoint web design.
Open a .spdesigntxt file with Office SharePoint Designer on Microsoft Windows. Use the application's Open command to open the file.
Other programs may display the file as plain text, but they are unlikely to interpret its SharePoint Designer data correctly.
Open the file in Office SharePoint Designer and use the application's available publishing or export functions when moving associated SharePoint site content to another format.
Simply renaming the file extension does not convert the file or preserve its SharePoint Designer data.
Software applications that handle other tasks involving spdesigntxt files:
Microsoft Windows
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