ComponentsCopier.cs

/*
    A simple little editor extension to copy and paste all components
    Help from http://answers.unity3d.com/questions/541045/copy-all-components-from-one-character-to-another.html
    license: WTFPL (http://www.wtfpl.net/)
    author: aeroson
    advise: ChessMax
    editor: frekons
*/

#if UNITY_EDITOR
using UnityEngine;
using UnityEditor;
using System.Collections;

public class ComponentsCopier
{

    static Component[] copiedComponents;

    [MenuItem("GameObject/Copy all components %&C")]
    static void Copy()
    {
        if (UnityEditor.Selection.activeGameObject == null)
            return;

        copiedComponents = UnityEditor.Selection.activeGameObject.GetComponents<Component>();
    }

    [MenuItem("GameObject/Paste all components %&P")]
    static void Paste()
    {
        if (copiedComponents == null)
        {
            Debug.LogError("Nothing is copied!");
            return;
        }

        foreach (var targetGameObject in UnityEditor.Selection.gameObjects)
        {
            if (!targetGameObject)
                continue;

            Undo.RegisterCompleteObjectUndo(targetGameObject, targetGameObject.name + ": Paste All Components"); // sadly does not record PasteComponentValues, i guess

            foreach (var copiedComponent in copiedComponents)
            {
                if (!copiedComponent)
                    continue;

                UnityEditorInternal.ComponentUtility.CopyComponent(copiedComponent);

                var targetComponent = targetGameObject.GetComponent(copiedComponent.GetType());

                if (targetComponent) // if gameObject already contains the component
                {
                    if (UnityEditorInternal.ComponentUtility.PasteComponentValues(targetComponent))
                    {
                        Debug.Log("Successfully pasted: " + copiedComponent.GetType());
                    }
                    else
                    {
                        Debug.LogError("Failed to copy: " + copiedComponent.GetType());
                    }
                }
                else // if gameObject does not contain the component
                {
                    if (UnityEditorInternal.ComponentUtility.PasteComponentAsNew(targetGameObject))
                    {
                        Debug.Log("Successfully pasted: " + copiedComponent.GetType());
                    }
                    else
                    {
                        Debug.LogError("Failed to copy: " + copiedComponent.GetType());
                    }
                }
            }
        }

        copiedComponents = null; // to prevent wrong pastes in future
    }

}
#endif

Lifesaver!
Thanks a lot! 👍

This doesn't work when I copy all components in the game view and paste them all into the scene view after stopping the play mode. It logs Successfully pasted in the console for all components but values don't change.

I am using Unity 2021.3.2f1.

This doesn't work when I copy all components in the game view and paste them all into the scene view after stopping the play mode. It logs Successfully pasted in the console for all components but values don't change.

I am using Unity 2021.3.2f1.

That's just how this script works.
After exiting PlayMode all copied components are destroyed, so there is nothing to copy from

Might there be some way to use this recursively on every child game object with a same name as the one being copied from?
I.e. mass copier for every single component on a game object and components on child objects within said parent object

Thank you for this.

Thanksssss!!!!!!!!!!!! Very useful.

Hello, Great code - made some modification to allow copy multiple components of one type (had problems with colliders) - hope will help others :3

Hi, @alex798 . Im in the same boat as you in respect to having multiple components of the same type that i need to copy but your script isnt working for me. it tells me targetComponent has no Lenght and cannot be indexed by []

Hi, @alex798 . Im in the same boat as you in respect to having multiple components of the same type that i need to copy but your script isnt working for me. it tells me targetComponent has no Lenght and cannot be indexed by []

Dunno how it can have no Lenght - maybe u lost S in the end of GetComponentS? - in this case it will get only one element instead of array with said error.