Multi-Objects Renaming tool (MORT) is a simple editor improvement that adds one often used function to automate editing of tons actors\objects names (except folders) in the World Outliner and Content Browser.
Simple and awesome editor improvement that helps you to rename and rearrange your structure in the World Outliner and Content Browser. Just watch the video and you will see how it is cool and easy.
Look at another cool time saver "Multi Assets Changer": https://www.unrealengine.com/marketplace/en-US/product/multi-assets-changer
Documentation and Video:
Old documentation\Video (4.10-4.22):