To perform this, you require Google Chrome since you are going to utilize a Chrome extension to do all the things for you. Facebook post manager is a Google Chrome extension that lets you delete all Facebook Posts in a single click.
If you prefer to alter the privacy of all posts from "Public" to "Friends", or from "Buddies" to "Only me", or "Public" to "Only me"-- it is all possible with a filling a form and hitting a button.
Delete All Facebook Wall Posts
You can find posts which contain a keyword and change the privacy of those posts or erase those posts. It is likewise possible to delete all Facebook posts that were posted in a month of the year, for instance, I can erase posts that were developed in the month of November 2017.
Facebook tagging is among the things that annoys when you have got a buddy who tags on every photo or his/her profile photo. You may not always go to their photo and untag yourselves each time he or she tags you on an image where you do not belong.
Use Facebook Post Manager assists you to change the privacy of such posts quickly by searching those posts in your Activity Log using the keyword, "tagged".
You can also learn how to erase all messages on Facebook. Although this is a 2014 trick, the extension appears to be working, Delete All Facebook Wall Posts.