J0SiE

Created to help those people who don’t like to edit code in template files (or are too lazy to do that). 
Just activate the plugin and it will automatically show the_excerpts in your homepage, archives and search results. 
It tries to display your custom excerpt text and if it doesn’t find it it will show an automatically generated excerpt. 
You can also define excerpt length, custom read more link and attach a thumbnail.

Auto Excerpt everywhere

Thanks to author for creating this plugin. 
It's works out of box. And working fine at WordPress Version 4.6.1


Works out of the box on WP Version 4.6.1

The plugin automatically displays excerpts instead of full post contents in your blog. Custom excerpts and generated excerpts supported.

tepelstreel

The Automated Editing was made, because there are so many people, who just forget to add an excerpt or tags to the post, when they publish it. For several reasons that can be annoying. So, every time a post is saved, the plugin just checks, whether there is an excerpt or not. If there is no excerpt, it will check, whether you have defined some length or type of excerpt. If you haven’t, the plugin just creates a post excerpt by cutting off all short codes of the content and taking the first 3 sentences as the excerpt. The same happens with the ‘more’ tag. It will be automatically set, if you want it. If you don’t define a number of sentences after which the tag has to be inserted, the plugin will insert it after 5 sentences.
Since version 1.4 you have the possibility to check elder posts for missing excerpts, ‘more’ tags and thumbnails. The plugin will try to fix those posts automatically and deliver a list of posts that could not be fixed. You can access these posts from the admin panel of the automated editing plugin and try to fix them manually.
It is also completely multisite enabled since version 1.4. You can check and repair posts network-wide.

Automated Editing

If working with a lot of editors, who either don't know how to use WP or don't pay attention, this plugin helps you by adding an excerpt aut …

Auto Excerpt everywhere vs Automated Editing