inonkp

Adds a checkbox to wordpress tables to allow bulk actions on ALL items in the table.
Tested on posts, pages, and woocommerce products.
To read about how it works: 
https://codewithbanji.com/2020/04/10/how-to-insert-a-select-all-button-to-a-wordpress-table/
And for other coding issues: 
https://codewithbanji.com

Select All Posts

Adds a checkbox to wordpress tables to allow bulk actions on ALL items in the table.

sparkweb

This plugin lets you edit the custom fields for many posts at once. Designed to work with pages, posts, and all custom post types. The plugin also has some actions included so that plugins and themes can integrate seamlessly and build their own extensions into the functionality.

Custom Field Bulk Editor

This plugin lets you edit the custom fields for many posts at once. Designed to work with pages, posts, and all custom post types.

Select All Posts vs Custom Field Bulk Editor