A tiny little editor window to switch objects activation state

ObjectActivationSwitch.cs

/*
 Copyright (c) 2022 Omid Saadat
 Licensed under the MIT License (Do whatevever you want with this!);
*/

using UnityEngine;
using UnityEditor;
public class ObjectActivationSwitch : EditorWindow
{
    [MenuItem("LeMoonade/ObjectActivationSwitch")]
    private static void ShowWindow()
    {
        var window = GetWindow<ObjectActivationSwitch>();
        window.titleContent = new GUIContent("ObjectActivationSwitch");
        window.Show();
    }

    private void OnGUI()
    {
        if (GUILayout.Button("Switch Objects"))
        {
            SwitchObjects();
        }
    }

    private void SwitchObjects()
    {
        var currentSelection = Selection.gameObjects;
        if (currentSelection != null && currentSelection.Length > 0)
        {
            foreach (var obj in currentSelection)
            {
                obj.SetActive(!obj.activeSelf);
            }
        }
    }
}

Go to LeMoonade menu, and select ObjectActivationSwitch
Preview: