Delete all facebook group members on a given page. Usage: Copy this script, open developers console (F12) in chrome (win) and paste this script. The script will delete all the members that you can see in the given page. Once the script is done you should see a group with no members.

Delete facebook group members (all the one visible on a given page)

/**
 *
 * This script will remove all group members displayed on group page except admins.
 *
 * @author: Nir Geier
 * @modified: Ken Carino
 *
 * Updated May 29, 2019 - Tested on Chrome Version 74.0.3729.169
 *
 * Requirements:
 *    1. Facebook must use english as language
 *
 * Usage:
 *    Load as many users in group members page, then open console and paste this script in the
 *    console. All members loaded in the page will be deleted by this code.
 *
 *    Once the script finished executing, the page will automatically reload.
 *
 *    If looking the console doesn't give any feedback of what's happening, reload the
 *    page and repeat again. Take into account that it will delete one user per second,
 *    so it may take a while.
 *
*/
var FBClearGroup = function() {

    /**
     * Var initialization
     */
    var memberSettings, removeLinks, timer;

    /**
     * This will grab all remove links available on the page
     */
    function grabRemoveLink() {
        memberSettings = Array.prototype.slice.call(document.querySelectorAll("button[aria-label='Member Settings']"));

        // Expose all the remove users links except the first one, which is the admin
        var i = 0;
        var adminsNum = 1;

        memberSettings.forEach(function(item) {
            i = i + 1;
            if (i <= (adminsNum*2)) {
                return;
            }
            item.click();
            document.querySelectorAll('a[data-testid="leave_group"]')[0].click();
        });

        console.log('Getting all remove links...');

        // continue with the delete flow
        timer = setTimeout(removeMember, 10000);
    }

    /**
     * This function will trigger remove buttons
     */
    function removeMember() {
        clearTimeout(timer);

        var confirmButton = Array.prototype.slice.call(document.querySelectorAll('button.layerConfirm.uiOverlayButton'));
        
        var i = 1;
        confirmButton.forEach(function(item) {
            console.log(item);
            setTimeout(function() {
                item.click();
                console.log('Removing member...');
            }, i * 1000);
            i = i + 1;
        });

        // Reload the page after everything is finished + 7 seconds
        setTimeout(function() {
            window.location.reload(false); 
        }, (i + 7) * 1000);
    }

    grabRemoveLink();
}();

Removes one member (not admin, which is good, since I should be the last).... THEN it returns an error message and the process stops.
Here is the error:

jquery-1.8.2.min.js:2 Cross-Origin Read Blocking (CORB) blocked cross-origin response https://api.ipify.org/?format=json with MIME type application/json. See https://www.chromestatus.com/feature/5629709824032768 for more details.

no longer works with any browser

Hi, this script no longer works. It delete only the first member, then reload the page and the process stops.

try this
https://adeftsolutions.com/2018/11/03/remove-all-facebook-members-from-your-group-automatically-script/

hello,
is it possible to change the code so, it skips the admins, moderators and the pre-approved members? for example to start deleting from member number 100 so it skips the admins and moderators and preapproved lists?
or to delete only members added on exact dates ?

thanks