exoboy

How many times have you been given revisions to an image or documents for your WordPress Media Library and needed to manually remove the old versions from the site before you could upload the new image attachments?
Well, this plugin works quietly in the background on any attachment upload screen and looks for a duplicate matching attachment and replaces it with your new attachment. No need to go to a special window or panel just to replace an image, the plugin automatically intercepts the upload and takes cares of the housekeeping.
Matching is based on filenames, so the new and old filenames must be the same. This plugin searches all of your uploads folders and subfolders to find every instance of your old attachment and replaces them with the new version of your attachment so you don’t need to find and replace all your linked images in your website.
New thumbnails are also generated which will reflect the new content of your latest upload(s). Also, if you have saved any meta data in the upload’s Attachment Details, these will be preserved and moved to the new upload’s Attachment Details.
Works with single or multiple file uploads. The plugin also only loads if you are signed in to the admin area and have upload privileges.
Temporarily turning the plugin on or off, or hiding the status messages is easy. There is a settings button on all messages or you can go to the setting menu and select the Media Replace option. See screenshots below for more details.
<h3>Copyright</h3>
WXY Tools Media Replace is Copyright 2017-Present Clarence “exoboy” Bowman and wxytools.com 
WXY Tools Media Replace is distributed under the terms of the GNU GPL
This program is free software: you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published by 
the Free Software Foundation, either version 2 of the License, or 
(at your option) any later version.
This program is distributed in the hope that it will be useful, 
but WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
GNU General Public License for more details.

WXY Tools Media Replace

Automatically replace duplicate uploaded content in your media library while preserving any associated meta data.

lucasstad

Lucas String Replace replaces any string on any WordPress processed page with another string. 
It takes the final output of WordPress and replaces defined strings with another string.
New: Add multiple strings to replace and create mutltiple sets
<h4>You can use it, for example, for the following purposes</h4>
<ul>
<li>HTTPS Protocol Rewriting (replace any “http://domain.com” with “https://domain.com”)</li>
<li>Better WordPress (Multisite) Domain Mapping (replace any “myblog.domain.com” with “www.myblog.com”)</li>
<li>Replace or add HTML to a specific place</li>
<li>Make changes or add contents to your sitemap.xml (non-static, tested with XML Sitemap Generator) or to your robots.txt</li>
<li>Repace or change anything made out of letters and numbers…</li>
</ul>
<h4>Please note</h4>
<ul>
<li>Lucas String Replace can slow down your website speed. It is recommended to use it in combination with a caching plugin to keep your website fast.</li>
</ul>

Lucas String Replace

Does what "Say what?" does not do: change widget titles too

Pretty neat

Change anything: Lucas String Replace takes the final output of WordPress and replaces the defined strings with another string

WXY Tools Media Replace vs Lucas String Replace