WordPress Username Availability Checker for WordPress & BuddyPress

WordPress Username Availability Checker Plugin allows to check for the availability of a username on WordPress, BuddyPress Registration pages and Add new user screen. The WordPress Username availability checker plugin is very helpful for BuddyPress based sites, or WordPress sites that allow registration. It allows users to see if a username is available without any page refresh. Also, if you are running larger WordPress Multisite install, It is useful for admin to see the availability of username without reloading the add new user page.


  • Checks for username availability in WordPress Admin New User screen
  • Checks for username availability on WordPress standard registration page
  • Checks for availability on BuddyPress registration page.
  • Compatible with BuddyPress Ajax registration plugin.
  • Compatible with WordPress Ajax Login plugin.
  • 100% BuddyPress compatible.

If you are building a social site, use this plugin to look more professional.



This plugin is efficient and only loads the required javascript/css on specific pages.

It is flexible and can work with any 3rd party plugin with small snippet of code. Use our forums to ask us how to get it work with any other registration related plugin.

Release History

  • Version: 1.1.7

    Tuesday, 15 October, 2019
    • Tested With: WordPress 5.2.5
    • Compatible With: WordPress 4.0+

    Fix space in username when BuddyPress is active

  • Version: 1.1.6

    Wednesday, 09 October, 2019
    • Tested With: WordPress 5.2.3
    • Compatible With: WordPress 4.5+

    Sanitized username before checking. solves space and dashes issue.

  • Version: 1.1.5

    Thursday, 04 July, 2019
    • Tested With: WordPress 5.2.2
    • Compatible With: WordPress 3.5+

    Fix the undefined function get_current_screen.

  • Version: 1.1.3

    Monday, 10 June, 2019
    • Tested With: WordPress 5.2.1
    • Compatible With: WordPress 3.6+

    Tested with WordPress 5.2.1 & BuddyPress 4.3

  • Version: 1.1.2

    Wednesday, 29 November, 2017
    • Tested With: WordPress 4.9
    • Compatible With: WordPress 3.6+

    Added Compatibility with Login With Ajax plugin.
    Renamed as WordPress Username Availability Checker

  • Version: 1.1.1

    Friday, 11 August, 2017
    • Tested With: WordPress 4.8.1
    • Compatible With: WordPress 4.3

    Updated to add filter for allowing restrictions.

  • Version: 1.1.0

    Thursday, 22 October, 2015
    • Tested With: WordPress 4.3.1
    • Compatible With: WordPress 3.6+

    Completely refactored. Works with /without BuddyPress.
    Added support for Standard WordPress Registration page/Add New user screen

  • Version: 1.0.4

    Sunday, 10 March, 2013
    • Tested With: BuddyPress 1.7+/BuddyPress1.8
    • Compatible With: BuddyPress 1.7+/BuddyPress1.8

    Fix for deprecated functions in Bp 1.7

  • Version: 1.0.3

    Tuesday, 17 July, 2012
    • Tested With: BuddyPress 1.6.1
    • Compatible With: BuddyPress 1.6+

    Fixes for BuddyPress 1.6+

  • Version: 1.0.1

    Tuesday, 21 September, 2010
    • Tested With: WordPress 3.0.1+BuddyPress 1.2.6
    • Compatible With: wpmu 2.9.2+BuddyPress 1.2

    Fixed the json error with IE browsers.