diff --git a/index.html b/index.html
index 0459ceb3..2ec63925 100644
--- a/index.html
+++ b/index.html
@@ -159,6 +159,12 @@
       <div class="input-group mt-3" data-type="json-list">
         <textarea class="form-control code" onchange="updateJsonListField(this)" rows=3></textarea>
       </div>
+      <div class="input-group mt-3" data-type="nbt">
+        <div class="input-group-prepend">
+          <span class="input-group-text" data-name></span>
+        </div>
+        <textarea type="text" class="form-control code" onchange="updateField(this)" onfocus="this.select()" style="height: 0px"></textarea>
+      </div>
       <div class="input-group mt-3" data-type="error">
         <div class="input-group-prepend">
           <span class="input-group-text text-danger" data-i18n="error"></span>
diff --git a/schemas/1.14.json b/schemas/1.14.json
index b11323f6..dca1ffa6 100644
--- a/schemas/1.14.json
+++ b/schemas/1.14.json
@@ -190,7 +190,7 @@
         },
         {
           "id": "tag",
-          "type": "string",
+          "type": "nbt",
           "require": [
             "minecraft:set_nbt"
           ]
@@ -319,6 +319,15 @@
             "minecraft:set_attributes"
           ]
         },
+        {
+          "id": "ops",
+          "type": "array",
+          "button": "field",
+          "values": "nbt_operation",
+          "require": [
+            "minecraft:copy_nbt"
+          ]
+        },
         {
           "id": "conditions",
           "type": "array",
@@ -405,6 +414,37 @@
           ]
         }
       ]
+    },
+    {
+      "id": "nbt_operation",
+      "type": "object",
+      "color": "dark",
+      "default": {
+        "operation": "replace"
+      },
+      "fields": [
+        {
+          "id": "source",
+          "type": "string",
+          "class": "code"
+        },
+        {
+          "id": "target",
+          "type": "string",
+          "class": "code"
+        },
+        {
+          "id": "op",
+          "type": "enum",
+          "source": "operation.type",
+          "default": "replace",
+          "values": [
+            "replace",
+            "append",
+            "merge"
+          ]
+        }
+      ]
     }
   ]
 }
diff --git a/view.js b/view.js
index a8749b9d..3756471a 100644
--- a/view.js
+++ b/view.js
@@ -51,6 +51,7 @@ function generateComponent(data, struct) {
     case 'set': return generateSet(data, struct);
     case 'json': return generateJson(data, struct);
     case 'json-list': return generateJsonList(data, struct);
+    case 'nbt': return generateNbt(data, struct);
     case 'array': return generateArray(data, struct);
     case 'object': return generateObject(data, struct);
     default: return generateError('Unknown component type "' + struct.type + '"')};
@@ -198,6 +199,14 @@ function generateJsonList(data, struct) {
   return $el;
 }
 
+function generateNbt(data, struct) {
+  let $el = $('#components').find('[data-type="nbt"]').clone();
+  $el.attr('data-field', struct.id);
+  $el.find('[data-name]').attr('data-i18n', struct.id);
+  $el.find('textarea').val(data).keydown(e => preventNewline(e));
+  return $el;
+}
+
 function generateError(error) {
   let $el = $('#components').find('[data-type="error"]').clone();
   $el.find('[data-name]').val(error);
@@ -239,6 +248,9 @@ function generateObject(data, struct) {
         console.error(e);
         $field = generateError('Failed generating "' + field.id + '" component');
       }
+      if (field.class) {
+        $field.addClass(field.class);
+      }
       if (field.type === 'array') {
         let color = field.color;
         if (color === undefined) {
@@ -254,6 +266,8 @@ function generateObject(data, struct) {
         $field.attr('data-field', field.id);
       }
       $body.append($field);
+    } else {
+      delete data[field.id];
     }
   }
   $body.children().first().removeClass('mt-3');