SharePoint Designer file
File type: Various data file
A .spdesignhtml file is an HTML-based web page file created for use with Microsoft Office SharePoint Designer.
It contains page content or markup for a Microsoft SharePoint site or web page.
File type category:
Various data file
Date updated: September 27, 2026
The .spdesignhtml file extension is associated with Microsoft Office SharePoint Designer, Microsoft's specialized HTML editor and web design application for creating and modifying SharePoint sites and web pages.
The file stores web-page content in an HTML-based form and may include markup used by a SharePoint page.
Office SharePoint Designer runs on Microsoft Windows. It is a legacy application and is no longer a current Microsoft tool for designing modern SharePoint sites, so this file type is mainly encountered in older SharePoint projects.
Open a .spdesignhtml file with Microsoft Office SharePoint Designer on Windows. If the file is not displayed in the Open dialog, select the option to show all files and then choose it.
Because the file contains HTML-based content, a web browser or text editor may display its contents, but those programs will not provide SharePoint Designer's editing and SharePoint-specific features.
To reuse the content, open the file in Microsoft Office SharePoint Designer and save or publish the page as a standard HTML page where the project permits it.
When SharePoint-specific elements are present, conversion may require manual editing or reconstruction in another web-authoring tool.
Software applications that handle other tasks involving spdesignhtml files:
Microsoft Windows
Language
