Sebastian Pisula

wp360

Plugin allows to duplicate post meta between the same post type. Edit post type, select source post to copy post meta, choose post meta and copy.

wp360.pro Duplicate Post Meta

Plugin allows to duplicate post meta between the same post type.

Yong

Javier Esteban

This plugin is useful if you want to see all post metas that stored in a post or page and the value of each meta. 
Whether for debugging, quick view a data or just curious what is saved inside your post or page meta.
Just install and activate, Post Meta Viewer plugin will show a metabox contain the list table of all post metas that saved for each post or page in easily readable format.
No settings needed just plug and play.
<h4>Thanks to Contributors</h4>
Thank you for the contibution to this plugin to
<ul>
<li><a href="https://profiles.wordpress.org/nobnob/" rel="nofollow ugc">Javier Esteban</a> for translating this plugin to Spanish</li>
</ul>

Post Meta Viewer

View all post meta that saved in a post, page or custom post type in easily readable format. No settings needed just plug and play.

wp360.pro Duplicate Post Meta vs Post Meta Viewer