Fleuv

Ever had to replace a couple of links after a migration or because another user added it somehow incorrectly to the 
site? Well no worries about that anymore, by simply installing and activating this plugin that problem will be gone for 
good!
With this plugin you can either replace incorrect links temporary or permanently. At the plugin settings page you’re 
able to tweak the replace algorithm at the following aspects:
<ul>
<li>Only replace links with a certain path prefix.</li>
<li>Exclude links from being replaced.</li>
</ul>
In the future there might also be a feature added to help specify on what content the replacement will be executed. For 
now the plugin does only replaces incorrect links in the <code>any</code> post type’s post content.
By using this plugin on your WordPress site, you’re allowing the plugin to replace URL’s in the <code>src</code> attribute which 
are stored in your WordPress site’s database and thus can be altered via the WordPress admin area.
<h3>Arbitrary section</h3>
The plugin comes with one hook <code>fix-content-links_save_option_{$setting}</code> where $setting is either: type, path or 
exclude. With this filter you can add your own functionality before the saving process of an option completes.
Use with the Transient API to modify the admin notice during the saving process.
<h4>Example</h4>
<pre><code><?php
add_filter('fix-content-links_save_option_type', function ($value) {
 $transient = 'fix-content-links_' . get_current_user_id() . '_admin_notice'
 $update = get_transient($transient);

 if ($value === 'disable' && is_array($update) && array_key_exists('message', $update)) {
 $update['message'] = '' . __('Plugin disabled.') '';
 set_transient($update);
 }

 return $value;
}
?>
</code></pre>

Fix Content Links

Replaces incorrect links to sources located in the uploads, plugins, themes or wp-content folder.

Paul Bearne

This is a simple tool that helps you provide the site verification code and file generator for any service that needs to verify the site 
via a comment / meta in the head section or via a file URL.
This is a generic site certification tool. 
To use it, just add the plug-in and turn it on as needed. 
You will no longer need to FTP a file to the site root or add extra tags to the header.php in the template to enable your site to be verified by third-party services.
Some examples: 
Google webmaster tool needs a file called googleXXXXXXXXXXXXX.html with no contents. 
OR 
<meta name=”google-site-verification” content=”XXXXXXXXXXXXXXXXXXXXXXXXXXXXX” /> in the HTML head, 
Without this plugin, you would have to create a file and FTP it to your server or edit your template. With the plugin, you can generate the verification method needed automatically via the control panel.
Similarly, Trustwave SSL wants a file called cert.html with the contents of 
“Trustwave SSL Validation Page”

WP Site Verification tool

A tool to enable verification of site ownership via file or meta tag.

Fix Content Links vs WP Site Verification tool