This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Strict Permalinks


Strict Permalinks does two things:

  1. Restricts the post_name portion of the permalink to alphanumerics and hyphens
  2. Disables permalink editing once a post is published

Like me, you may have been under the impression that post slugs are already restricted to alphanumerics and hyphens. In the current WordPress 2.8.5, a title that includes certain kinds of punctuation (e.g., “smartquotes”) will result in URL-encoded characters in the post_name field. Many browsers handle this oddity seamlessly, however this may cause difficulties when integrating with systems expecting a more limited URL syntax.


  1. Use the plugin updater in WordPress or…
  2. Delete the previous strict-permalinks folder from the /wp-content/plugins/ directory
  3. Upload the new strict-permalinks folder to the /wp-content/plugins/ directory


  1. In all cases the post_title to post_name conversion (i.e., the sanitize_title filter) will be limited to a-z, 0-9 and hyphens (-).
  2. If a post is not yet published, the permalink can be edited as usual.
  3. Once a post is published, the permalink editing interface is disabled.


  • With and without Strict Permalinks


  1. Upload the strict-permalinks folder to the /wp-content/plugins/ directory or install directly through the plugin installer.
  2. Activate the plugin through the ‘Plugins’ menu in WordPress or by using the link provided by the plugin installer.


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Contributors & Developers

“Strict Permalinks” is open source software. The following people have contributed to this plugin.


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Interested in development?

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1.1 (2010-03-17):

  • Fixed a bug that was preventing the edit post tag cloud from working

1.0 (2009-11-06):

  • Initial Public Release