Unique Title Checker


The plugin provides a filter unique_title_checker_arguments, which enables you to modify the WP_Query arguments used to find duplicate titles. You may use it so search in more than only current post type for a duplicate title.

This is plugin is an enhancement of the Duplicate Title Checker by ketanajani which only supports posts but not pages or custom post types.


  • A post with a unique title
  • A new post with a duplicate title


Why should I use this plugin?

Some SEO experts say, that you should not have two pages with the same title. If you website wants to avoid duplicate titles, this plugin can help you on that task, as it checks the unqiueness, before you save or publish a post.

Will this plugin work with my custom post type?

Yes! It was implemented with custom post types in mind. With the default setting, it will check for duplicate titles only in the same post type.

Which titles will be checked?

With the default settings, all posts with any post status (even custom ones) will be included into the check, with the exception of the statuses “draft”, “auto-draft”, “inherit” and “trash”.

Will the plugin block a post from being saved, if the title is not unique?

No! You can always save the post. There might be good reasons for you, to have duplicate titles on your site. The plugin itself does not influence the saving in any kind. It’s whole functionality is only based on some AJAX.

When will the title be checked for it’s uniqueness?

Every time you leave the title input field, the plugin will check the uniqueness of the new title, so you know if it will be unique, before you save the post.

Can I customize the defaults for the check?

Absolutely! The plugin provides a filter called unique_title_checker_arguments. With this filter, you can alter the arguments used for the WP_Query, the plugin uses to get posts with duplicate titles.

Can I only show messages, if a title is not unique?

Yes, you can simply use the filter unique_title_checker_only_unique_error with __return_true to deactivate it (or use this plugin which implements the filter).


July 22, 2019
Thank you so much, now I can be sure there is no more duplicate post, page & custom post type. Thanks for the plugin.
Read all 6 reviews

Contributors & Developers

“Unique Title Checker” is open source software. The following people have contributed to this plugin.


“Unique Title Checker” has been translated into 1 locale. Thank you to the translators for their contributions.

Translate “Unique Title Checker” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.



  • Improve the translation for langs having “multiple singulars” (e.g. RU)
  • Time invested for this release: 45min


  • Fix jQuery noConflict issue with Gutenberg block editor
  • Time invested for this release: 15min


  • Add support for Gutenberg block editor
  • Time invested for this release: 90min


  • Adding a filter unique_title_checker_only_unique_error to hide the success message, if a title is unique
  • Time invested for this release: 30min


  • Apply WordPress Coding Standards
  • Time invested for this release: 20min


  • Fixing German translation and tag as tested up to 4.5
  • Time invested for this release: 10min


  • Fixing query arguments for admin notices
  • Time invested for this release: 10min


  • Show warning when editing a post that has a duplicate title
  • Time invested for this release: 30min


  • Show no warning on empty titles
  • Time invested for this release: 10min


  • First stable version to be deployed in the official WordPress Plugin Repository
  • Writing a readme file
  • Making some screenshots
  • Submitting plugin request form
  • Adding plugin to official SVN repository
  • Time invested for this release: 2h


  • First version of the plugin including a German translation
  • Time invested for this release: 3h