diff --git a/Source/Editor/CustomEditors/Editors/TagEditor.cs b/Source/Editor/CustomEditors/Editors/TagEditor.cs
index c5c1ee6b0..0523904e5 100644
--- a/Source/Editor/CustomEditors/Editors/TagEditor.cs
+++ b/Source/Editor/CustomEditors/Editors/TagEditor.cs
@@ -55,8 +55,8 @@ namespace FlaxEditor.CustomEditors.Editors
             {
                 if (Values[0] is Tag asTag)
                     return asTag;
-                if (Values[0] is int asInt)
-                    return new Tag(asInt);
+                if (Values[0] is uint asUInt)
+                    return new Tag(asUInt);
                 if (Values[0] is string asString)
                     return Tags.Get(asString);
                 return Tag.Default;
@@ -65,7 +65,7 @@ namespace FlaxEditor.CustomEditors.Editors
             {
                 if (Values[0] is Tag)
                     SetValue(value);
-                if (Values[0] is int)
+                if (Values[0] is uint)
                     SetValue(value.Index);
                 else if (Values[0] is string)
                     SetValue(value.ToString());
@@ -114,7 +114,7 @@ namespace FlaxEditor.CustomEditors.Editors
         private static void GetTags(TreeNode n, PickerData pickerData)
         {
             if (n is TreeNodeWithAddons a && a.Addons.Count != 0 && a.Addons[0] is CheckBox c && c.Checked)
-                pickerData.CachedTags.Add(new Tag((int)n.Tag));
+                pickerData.CachedTags.Add(new Tag((uint)n.Tag));
             foreach (var child in n.Children)
             {
                 if (child is TreeNode treeNode)
@@ -139,7 +139,7 @@ namespace FlaxEditor.CustomEditors.Editors
             if (pickerData.IsSingle)
             {
                 UncheckAll(node.ParentTree, node);
-                var value = new Tag(c.Checked ? (int)node.Tag : -1);
+                var value = new Tag(c.Checked ? (uint)node.Tag : 0);
                 pickerData.SetValue?.Invoke(value);
                 pickerData.SetValues?.Invoke(new[] { value });
             }
@@ -283,7 +283,8 @@ namespace FlaxEditor.CustomEditors.Editors
             for (var i = 0; i < tags.Length; i++)
             {
                 var tag = tags[i];
-                bool isSelected = pickerData.IsSingle ? value.Index == i : values.Contains(new Tag(i));
+                var tagValue = new Tag((uint)(i + 1));
+                bool isSelected = pickerData.IsSingle ? value == tagValue : values.Contains(tagValue);
 
                 // Count parent tags count
                 int indentation = 0;
@@ -296,7 +297,7 @@ namespace FlaxEditor.CustomEditors.Editors
                 // Create node
                 var node = new TreeNodeWithAddons
                 {
-                    Tag = i,
+                    Tag = tagValue.Index,
                     Text = tag,
                     ChildrenIndent = nodeIndent,
                     CullChildren = false,
diff --git a/Source/Engine/Level/Tags.cpp b/Source/Engine/Level/Tags.cpp
index 67633df9e..21cd69c08 100644
--- a/Source/Engine/Level/Tags.cpp
+++ b/Source/Engine/Level/Tags.cpp
@@ -12,7 +12,8 @@ FLAXENGINE_API String* TagsListDebug = nullptr;
 
 const String& Tag::ToString() const
 {
-    return Index >= 0 && Index < Tags::List.Count() ? Tags::List.Get()[Index] : String::Empty;
+    const int32 index = (int32)Index - 1;
+    return index >= 0 && index < Tags::List.Count() ? Tags::List.Get()[index] : String::Empty;
 }
 
 bool Tag::operator==(const StringView& other) const
@@ -27,7 +28,7 @@ bool Tag::operator!=(const StringView& other) const
 
 void FLAXENGINE_API Serialization::Serialize(ISerializable::SerializeStream& stream, const Tag& v, const void* otherObj)
 {
-    if (v.Index != -1)
+    if (v.Index != 0)
         stream.String(v.ToString());
     else
         stream.String("", 0);
@@ -42,11 +43,11 @@ Tag Tags::Get(const StringView& tagName)
 {
     if (tagName.IsEmpty())
         return Tag();
-    Tag tag = List.Find(tagName);
-    if (tag.Index == -1 && tagName.HasChars())
+    Tag tag(List.Find(tagName) + 1);
+    if (tag.Index == 0 && tagName.HasChars())
     {
-        tag.Index = List.Count();
         List.AddOne() = tagName;
+        tag.Index = List.Count();
 #if !BUILD_RELEASE
         TagsListDebug = List.Get();
 #endif
@@ -56,7 +57,7 @@ Tag Tags::Get(const StringView& tagName)
 
 bool Tags::HasTag(const Array<Tag>& list, const Tag& tag)
 {
-    if (tag.Index == -1)
+    if (tag.Index == 0)
         return false;
     const String& tagName = tag.ToString();
     for (const Tag& e : list)
@@ -70,7 +71,7 @@ bool Tags::HasTag(const Array<Tag>& list, const Tag& tag)
 
 bool Tags::HasTagExact(const Array<Tag>& list, const Tag& tag)
 {
-    if (tag.Index == -1)
+    if (tag.Index == 0)
         return false;
     return list.Contains(tag);
 }
@@ -119,7 +120,7 @@ bool Tags::HasAllExact(const Array<Tag>& list, const Array<Tag>& tags)
     return true;
 }
 
-const String& Tags::GetTagName(int32 tag)
+const String& Tags::GetTagName(uint32 tag)
 {
     return Tag(tag).ToString();
 }
diff --git a/Source/Engine/Level/Tags.cs b/Source/Engine/Level/Tags.cs
index b4aa3468c..8f46d2f85 100644
--- a/Source/Engine/Level/Tags.cs
+++ b/Source/Engine/Level/Tags.cs
@@ -1,33 +1,29 @@
 // Copyright (c) 2012-2022 Wojciech Figat. All rights reserved.
 
 using System;
+using System.ComponentModel;
+using System.Globalization;
 using System.Runtime.CompilerServices;
 
 namespace FlaxEngine
 {
+    [TypeConverter(typeof(TypeConverters.TagConverter))]
     partial struct Tag : IEquatable<Tag>, IEquatable<string>, IComparable, IComparable<Tag>, IComparable<string>
     {
         /// <summary>
         /// The default <see cref="Tag"/>.
         /// </summary>
-        public static Tag Default => new Tag(-1);
+        public static Tag Default => new Tag(0);
 
         /// <summary>
         /// Initializes a new instance of the <see cref="Tag" /> struct.
         /// </summary>
         /// <param name="index">The tag index.</param>
-        public Tag(int index)
+        public Tag(uint index)
         {
             Index = index;
         }
 
-        [System.Runtime.Serialization.OnDeserializing]
-        internal void OnDeserializing(System.Runtime.Serialization.StreamingContext context)
-        {
-            // Initialize structure with default values to replicate C++ deserialization behavior
-            Index = -1;
-        }
-
         /// <summary>
         /// Compares two tags.
         /// </summary>
@@ -50,6 +46,28 @@ namespace FlaxEngine
             return left.Index == right.Index;
         }
 
+        /// <summary>
+        /// Compares two tags.
+        /// </summary>
+        /// <param name="left">The lft tag.</param>
+        /// <param name="right">The right tag name.</param>
+        /// <returns>True if both values are equal, otherwise false.</returns>
+        public static bool operator ==(Tag left, string right)
+        {
+            return string.Equals(left.ToString(), right, StringComparison.Ordinal);
+        }
+
+        /// <summary>
+        /// Compares two tags.
+        /// </summary>
+        /// <param name="left">The lft tag.</param>
+        /// <param name="right">The right tag name.</param>
+        /// <returns>True if both values are not equal, otherwise false.</returns>
+        public static bool operator !=(Tag left, string right)
+        {
+            return !string.Equals(left.ToString(), right, StringComparison.Ordinal);
+        }
+
         /// <summary>
         /// Checks if tag is valid.
         /// </summary>
@@ -58,7 +76,7 @@ namespace FlaxEngine
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static implicit operator bool(Tag tag)
         {
-            return tag.Index != -1;
+            return tag.Index != 0;
         }
 
         /// <inheritdoc />
@@ -104,7 +122,7 @@ namespace FlaxEngine
         /// <inheritdoc />
         public override int GetHashCode()
         {
-            return Index;
+            return (int)Index;
         }
 
         /// <inheritdoc />
@@ -124,7 +142,7 @@ namespace FlaxEngine
         /// <returns>True if given tag is contained by the list of tags. Returns false for empty list.</returns>
         public static bool HasTag(this Tag[] list, Tag tag)
         {
-            if (tag.Index == -1)
+            if (tag.Index == 0)
                 return false;
             string tagName = tag.ToString();
             foreach (Tag e in list)
@@ -144,7 +162,7 @@ namespace FlaxEngine
         /// <returns>True if given tag is contained by the list of tags. Returns false for empty list.</returns>
         public static bool HasTagExact(this Tag[] list, Tag tag)
         {
-            if (tag.Index == -1)
+            if (tag.Index == 0)
                 return false;
             if (list == null)
                 return false;
@@ -233,3 +251,40 @@ namespace FlaxEngine
         }
     }
 }
+
+namespace FlaxEngine.TypeConverters
+{
+    internal class TagConverter : TypeConverter
+    {
+        /// <inheritdoc />
+        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
+        {
+            if (sourceType == typeof(string))
+                return true;
+            return base.CanConvertFrom(context, sourceType);
+        }
+
+        /// <inheritdoc />
+        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
+        {
+            if (value is string str)
+            {
+                if (str.Length == 0)
+                    return Tag.Default;
+                return Tags.Get(str);
+            }
+            return base.ConvertFrom(context, culture, value);
+        }
+
+        /// <inheritdoc />
+        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
+        {
+            if (destinationType == typeof(string))
+            {
+                var v = (Tag)value;
+                return v.ToString();
+            }
+            return base.ConvertTo(context, culture, value, destinationType);
+        }
+    }
+}
diff --git a/Source/Engine/Level/Tags.h b/Source/Engine/Level/Tags.h
index eda44e224..fac49598d 100644
--- a/Source/Engine/Level/Tags.h
+++ b/Source/Engine/Level/Tags.h
@@ -14,9 +14,9 @@ API_STRUCT(NoDefault) struct FLAXENGINE_API Tag
     DECLARE_SCRIPTING_TYPE_MINIMAL(Tag);
 
     /// <summary>
-    /// Index of the tag (in global Level.Tags list).
+    /// Index of the tag (in global Level.Tags list). Index 0 is invalid. 1 is the first index.
     /// </summary>
-    API_FIELD() int32 Index = -1;
+    API_FIELD() uint32 Index = 0;
 
     /// <summary>
     /// Gets the tag name.
@@ -26,14 +26,14 @@ API_STRUCT(NoDefault) struct FLAXENGINE_API Tag
 public:
     Tag() = default;
 
-    FORCE_INLINE Tag(int32 index)
+    FORCE_INLINE explicit Tag(uint32 index)
         : Index(index)
     {
     }
 
     FORCE_INLINE operator bool() const
     {
-        return Index != -1;
+        return Index != 0;
     }
 
     FORCE_INLINE bool operator==(const Tag& other) const
@@ -142,7 +142,7 @@ public:
     static bool HasAllExact(const Array<Tag>& list, const Array<Tag>& tags);
 
 private:
-    API_FUNCTION(NoProxy) static const String& GetTagName(int32 tag);
+    API_FUNCTION(NoProxy) static const String& GetTagName(uint32 tag);
 };
 
 #if !BUILD_RELEASE