hwinote

HwiNote Content Search Tool helps site administrators and developers find where text, shortcode snippets, widget content, and custom field values are used in a WordPress site.
Main features:
<ul>
<li>Search posts, pages, and public custom post types.</li>
<li>Search custom fields.</li>
<li>Search widget settings and content.</li>
<li>View shortcode usage.</li>
<li>Highlight matching text in the editor when opening a result.</li>
<li>Supports OR, AND, exact match, and regular expression modes.</li>
</ul>
This plugin is designed for site maintenance, migration checks, and content audits from the WordPress admin area.

HwiNote Content Search Tool

Search posts, pages, custom fields, widgets, and shortcode usage from the WordPress admin.

meloniq

Enhance the default WordPress admin search by including custom fields (post meta) in search results. 
This plugin seamlessly extends the post listing (edit.php) search functionality, allowing administrators to quickly find content based on values stored in custom fields.
It works out of the box with no configuration required—just activate and start searching. 
Especially useful for sites that rely heavily on custom fields, such as those built with ACF or other meta-based data structures.
Lightweight, efficient, and fully integrated with the native WordPress admin experience.

WP-Admin Search Post Meta

Search WordPress admin posts by custom fields (post meta) directly from the default search.

HwiNote Content Search Tool vs WP-Admin Search Post Meta