This Plugin replaces the get_avatar function in pluggable.php to pass an alternate image to gravatar.com that generates the user’s display_name if they do not yet have a gravatar.
More features coming soon…
Plugin Updated Nov-17th

Display Name If No Gravatar

This Plugin passes an alternate image to gravatar.com that generates the user's display_name if they do not yet have a gravatar.

Dan Griffiths

DigitalME

Widgit

Finally fix WordPress’s biggest username limitation! WordPress permanently locks usernames by default, but Username Changer breaks through this restriction, giving you complete control over user identities on your WordPress site.
Why You Need This Plugin:
Fix username mistakes instantly: 
– Made a typo during user registration? Fix it in seconds! 
– Need to standardize usernames across your organization? Done! 
– User wants to change their login name for security? No problem!
Enhanced security and professionalism: 
– Quickly update compromised usernames without losing user data 
– Maintain brand consistency with standardized naming conventions 
– Resolve username conflicts when merging sites or migrating users
Trusted solution since 2011 with continuous updates and improvements.
Key Features That Make Username Changing Effortless:
✓ One-click username updates directly from user profiles 
✓ Preserve all user data, posts, and metadata during changes 
✓ Zero data loss – everything stays intact 
✓ Email notifications when usernames are changed 
✓ Nickname support for additional flexibility 
✓ Multisite compatible – manage usernames across your entire network 
✓ Proper username sanitization to prevent security issues 
✓ SQL-optimized performance that won’t slow down your site 
✓ Clean, standards-compliant code that works with other plugins
Perfect For:
WordPress Agencies: 
– Standardize client usernames across multiple sites 
– Fix registration errors during site migrations 
– Maintain professional username conventions
Security-Conscious Site Owners: 
– Quickly change usernames if security concerns arise 
– Update generic usernames (like “admin”) to improve security 
– Rotate usernames as part of security protocols
Community & Membership Sites: 
– Allow users to update their own usernames (when configured) 
– Resolve username disputes between members 
– Maintain clean, consistent member directories
Content Sites with Multiple Authors: 
– Works seamlessly with Co-Authors Plus and other author plugins 
– Update author usernames without breaking content associations 
– Keep author profiles consistent and professional
Simple Setup – Powerful Results: 
1. Install the plugin (30 seconds) 
2. Navigate to any user’s profile page 
3. Change the username instantly 
4. That’s it! The change applies across your entire site
No complicated settings, no technical headaches – just the username freedom WordPress should have included by default!

Username Changer

Excellent Work!  Great plugin, super simple and easy.   Surprised this is not in the WP Core...

Super Easy!

Unlock the power to change WordPress usernames with complete security and data integrity.

Display Name If No Gravatar vs Username Changer