This plugin hasn’t been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

AddThis xmlns


This plugin adds the xmlns:addthis=”” entry to the HTML tag. This head entry is required to make it Valid XHTML. More info at


  • Screenshot of the HTML tag which now includes the xmlns:addthis entry!


Why do I need this plugin?

If you are using the AddThis bookmarking plugin ( )
then you need this plugin to make sure that the generated HTML by the AddThis plugin is Valid.
The plugin adds the xmlns:addthis=”” entry to the html head tag so that the custom attributes of the AddThis plugin are recognized properly.



  • Initial release.

Contributors & Developers

This is open source software. The following people have contributed to this plugin.


Browse the code