Jeff Starr

Restores the Custom Field meta box for the Gutenberg Block Editor.
Update: This plugin currently is not needed, as WordPress version 5.0+ displays Custom Fields natively. Just click the settings button (three dots) and go to Options, where you will find the option to display the Custom Fields meta box. So this plugin still works great, but it is recommended to use native WP custom fields instead. For more information, read <a href="https://wordpress.org/support/topic/please-read-7/" rel="ugc">this post</a>.
Features
<ul>
<li>Easy to use</li>
<li>Clean code</li>
<li>Built with the WordPress API</li>
<li>Lightweight, fast and flexible</li>
<li>Works great with other WordPress plugins</li>
<li>Plugin options configurable via settings screen</li>
<li>Focused on flexibility, performance, and security</li>
<li>One-click restore plugin default options</li>
<li>Translation ready</li>
</ul>
Options
<ul>
<li>Specify the post types that should display custom fields</li>
<li>Exclude custom fields that are protected/hidden</li>
<li>Exclude custom fields with empty values</li>
<li>Exclude specific custom fields by name</li>
</ul>
Planned Features
<ul>
<li>Ajaxify adding of new Custom Fields</li>
<li>Ajax method to Delete custom fields</li>
</ul>
Privacy
This plugin does not collect or store any user data. It does not set any cookies, and it does not connect to any third-party locations. Thus, this plugin does not affect user privacy in any way.
Custom Fields for Gutenberg is developed and maintained by <a href="https://x.com/perishable" rel="nofollow ugc">Jeff Starr</a>, 15-year <a href="https://plugin-planet.com/" rel="nofollow ugc">WordPress developer</a> and <a href="https://books.perishablepress.com/" rel="nofollow ugc">book author</a>.
Support development
I develop and maintain this free plugin with love for the WordPress community. To show support, you can <a href="https://monzillamedia.com/donate.html" rel="nofollow ugc">make a donation</a> or purchase one of my books:
<ul>
<li><a href="https://wp-tao.com/" rel="nofollow ugc">The Tao of WordPress</a></li>
<li><a href="https://digwp.com/" rel="nofollow ugc">Digging into WordPress</a></li>
<li><a href="https://htaccessbook.com/" rel="nofollow ugc">.htaccess made easy</a></li>
<li><a href="https://wp-tao.com/wordpress-themes-book/" rel="nofollow ugc">WordPress Themes In Depth</a></li>
<li><a href="https://books.perishablepress.com/downloads/wizards-collection-sql-recipes-wordpress/" rel="nofollow ugc">Wizard’s SQL Recipes for WordPress</a></li>
</ul>
And/or purchase one of my premium WordPress plugins:
<ul>
<li><a href="https://plugin-planet.com/bbq-pro/" rel="nofollow ugc">BBQ Pro</a> – Blazing fast WordPress firewall</li>
<li><a href="https://plugin-planet.com/blackhole-pro/" rel="nofollow ugc">Blackhole Pro</a> – Automatically block bad bots</li>
<li><a href="https://plugin-planet.com/banhammer-pro/" rel="nofollow ugc">Banhammer Pro</a> – Monitor traffic and ban the bad guys</li>
<li><a href="https://plugin-planet.com/ga-google-analytics-pro/" rel="nofollow ugc">GA Google Analytics Pro</a> – Connect WordPress to Google Analytics</li>
<li><a href="https://plugin-planet.com/head-meta-pro/" rel="nofollow ugc">Head Meta Pro</a> – Ultimate Meta Tags for WordPress</li>
<li><a href="https://plugin-planet.com/simple-ajax-chat-pro/" rel="nofollow ugc">Simple Ajax Chat Pro</a> – Unlimited chat rooms</li>
<li><a href="https://plugin-planet.com/usp-pro/" rel="nofollow ugc">USP Pro</a> – Unlimited front-end forms</li>
</ul>
Links, tweets and likes also appreciated. Thanks! 🙂

Custom Fields for Gutenberg

If you are searching for the solution to display custom fields like they were displayed before Gutenberg - in native wp meta box - this is solution for you. 

Displays old native interface for Custom Fields

This plugin does one thing and does it well. This is how all plugins should be!

Good plugin by a top dev

Restores the Custom Field meta box for the Gutenberg Block Editor.

Tran Ngoc Tuan Anh

eLightUp

Meta Box

Doan Ngoc Anh

MB Rank Math Integration is a free extension for <a href="https://metabox.io" rel="nofollow ugc">Meta Box</a> plugin which allows developers to add content of custom fields to Rank Math Content Analysis to have better SEO score.
<blockquote>
Meta Box Lite 
 We recommend using <a href="https://metabox.io/lite/" rel="nofollow ugc">Meta Box Lite</a>, a feature-rich free UI version of Meta Box that provides UI and all free features for managing custom fields and dynamic content on WordPress, including post types, taxonomies, custom fields, and relationships.
</blockquote>
There are situations when we create custom fields to store real content for the posts. They are actually displayed in the frontend. Search engines such as Google or Bing see them and analyze them. But by default, Rank Math plugin takes only post content to analyze for SEO score and gives us feedback based on the post content. The plugin doesn’t analyze the all the content that appears to the search engine, which is a big missing part and that sometimes confuses us in SEO term.
So, the plugin MB Rank Math Integration fixes that problem by allowing us to add custom fields to the content analyzed by Rank Math plugin. This way, the Rank Math plugin and search engine will see the same content and we will have a correct advice for SEO content as well as correct SEO score.
<h3>Plugin Links</h3>
<ul>
<li><a href="https://metabox.io/plugins/mb-rank-math/" rel="nofollow ugc">Homepage</a></li>
<li><a href="https://github.com/rilwis/mb-yoast-seo" rel="nofollow ugc">Github repo</a></li>
<li><a href="https://metabox.io/plugins/" rel="nofollow ugc">View other extensions</a></li>
</ul>

MB Rank Math Integration

Add content of Meta Box custom fields to Rank Math Content Analysis.

Custom Fields for Gutenberg vs MB Rank Math Integration