diff --git a/osu.Game.Rulesets.Karaoke.Tests/IO/Serialization/Converters/RomajiTagsConverterTest.cs b/osu.Game.Rulesets.Karaoke.Tests/IO/Serialization/Converters/RomajiTagsConverterTest.cs
new file mode 100644
index 000000000..0511d9858
--- /dev/null
+++ b/osu.Game.Rulesets.Karaoke.Tests/IO/Serialization/Converters/RomajiTagsConverterTest.cs
@@ -0,0 +1,68 @@
+// Copyright (c) andy840119 <andy840119@gmail.com>. Licensed under the GPL Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using Newtonsoft.Json;
+using NUnit.Framework;
+using osu.Game.Rulesets.Karaoke.IO.Serialization.Converters;
+using osu.Game.Rulesets.Karaoke.Objects;
+using osu.Game.Rulesets.Karaoke.Tests.Asserts;
+
+namespace osu.Game.Rulesets.Karaoke.Tests.IO.Serialization.Converters
+{
+    public class RomajiTagsConverterTest : BaseSingleConverterTest<RomajiTagsConverter>
+    {
+        protected override JsonConverter[] CreateExtraConverts()
+            => new JsonConverter[]
+            {
+                new RomajiTagConverter(),
+            };
+
+        [Test]
+        public void TestSerialize()
+        {
+            var timeTags = new[]
+            {
+                new RomajiTag
+                {
+                    StartIndex = 2,
+                    EndIndex = 3,
+                    Text = "ji"
+                },
+                new RomajiTag
+                {
+                    StartIndex = 1,
+                    EndIndex = 2,
+                    Text = "roma"
+                },
+            };
+
+            const string expected = "[\"[1,2]:roma\",\"[2,3]:ji\"]";
+            string actual = JsonConvert.SerializeObject(timeTags, CreateSettings());
+            Assert.AreEqual(expected, actual);
+        }
+
+        [Test]
+        public void TestDeserialize()
+        {
+            const string json = "[\"[2,3]:ji\",\"[1,2]:roma\"]";
+
+            var expected = new[]
+            {
+                new RomajiTag
+                {
+                    StartIndex = 1,
+                    EndIndex = 2,
+                    Text = "roma"
+                },
+                new RomajiTag
+                {
+                    StartIndex = 2,
+                    EndIndex = 3,
+                    Text = "ji"
+                },
+            };
+            var actual = JsonConvert.DeserializeObject<RomajiTag[]>(json, CreateSettings());
+            TextTagAssert.ArePropertyEqual(expected, actual);
+        }
+    }
+}
diff --git a/osu.Game.Rulesets.Karaoke.Tests/IO/Serialization/Converters/RubyTagsConverterTest.cs b/osu.Game.Rulesets.Karaoke.Tests/IO/Serialization/Converters/RubyTagsConverterTest.cs
new file mode 100644
index 000000000..324794204
--- /dev/null
+++ b/osu.Game.Rulesets.Karaoke.Tests/IO/Serialization/Converters/RubyTagsConverterTest.cs
@@ -0,0 +1,68 @@
+// Copyright (c) andy840119 <andy840119@gmail.com>. Licensed under the GPL Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using Newtonsoft.Json;
+using NUnit.Framework;
+using osu.Game.Rulesets.Karaoke.IO.Serialization.Converters;
+using osu.Game.Rulesets.Karaoke.Objects;
+using osu.Game.Rulesets.Karaoke.Tests.Asserts;
+
+namespace osu.Game.Rulesets.Karaoke.Tests.IO.Serialization.Converters
+{
+    public class RubyTagsConverterTest : BaseSingleConverterTest<RubyTagsConverter>
+    {
+        protected override JsonConverter[] CreateExtraConverts()
+            => new JsonConverter[]
+            {
+                new RubyTagConverter(),
+            };
+
+        [Test]
+        public void TestSerialize()
+        {
+            var timeTags = new[]
+            {
+                new RubyTag
+                {
+                    StartIndex = 2,
+                    EndIndex = 3,
+                    Text = "ビ"
+                },
+                new RubyTag
+                {
+                    StartIndex = 1,
+                    EndIndex = 2,
+                    Text = "ル"
+                },
+            };
+
+            const string expected = "[\"[1,2]:ル\",\"[2,3]:ビ\"]";
+            string actual = JsonConvert.SerializeObject(timeTags, CreateSettings());
+            Assert.AreEqual(expected, actual);
+        }
+
+        [Test]
+        public void TestDeserialize()
+        {
+            const string json = "[\"[2,3]:ビ\",\"[1,2]:ル\"]";
+
+            var expected = new[]
+            {
+                new RubyTag
+                {
+                    StartIndex = 1,
+                    EndIndex = 2,
+                    Text = "ル"
+                },
+                new RubyTag
+                {
+                    StartIndex = 2,
+                    EndIndex = 3,
+                    Text = "ビ"
+                },
+            };
+            var actual = JsonConvert.DeserializeObject<RubyTag[]>(json, CreateSettings());
+            TextTagAssert.ArePropertyEqual(expected, actual);
+        }
+    }
+}
diff --git a/osu.Game.Rulesets.Karaoke/IO/Serialization/Converters/RomajiTagsConverter.cs b/osu.Game.Rulesets.Karaoke/IO/Serialization/Converters/RomajiTagsConverter.cs
new file mode 100644
index 000000000..4b0888dcc
--- /dev/null
+++ b/osu.Game.Rulesets.Karaoke/IO/Serialization/Converters/RomajiTagsConverter.cs
@@ -0,0 +1,15 @@
+// Copyright (c) andy840119 <andy840119@gmail.com>. Licensed under the GPL Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using osu.Game.Rulesets.Karaoke.Objects;
+using osu.Game.Rulesets.Karaoke.Utils;
+
+namespace osu.Game.Rulesets.Karaoke.IO.Serialization.Converters
+{
+    public class RomajiTagsConverter : SortableJsonConvertor<RomajiTag>
+    {
+        protected override IEnumerable<RomajiTag> GetSortedValue(IEnumerable<RomajiTag> objects)
+            => TextTagsUtils.Sort(objects);
+    }
+}
diff --git a/osu.Game.Rulesets.Karaoke/IO/Serialization/Converters/RubyTagsConverter.cs b/osu.Game.Rulesets.Karaoke/IO/Serialization/Converters/RubyTagsConverter.cs
new file mode 100644
index 000000000..265e4af57
--- /dev/null
+++ b/osu.Game.Rulesets.Karaoke/IO/Serialization/Converters/RubyTagsConverter.cs
@@ -0,0 +1,15 @@
+// Copyright (c) andy840119 <andy840119@gmail.com>. Licensed under the GPL Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using osu.Game.Rulesets.Karaoke.Objects;
+using osu.Game.Rulesets.Karaoke.Utils;
+
+namespace osu.Game.Rulesets.Karaoke.IO.Serialization.Converters
+{
+    public class RubyTagsConverter : SortableJsonConvertor<RubyTag>
+    {
+        protected override IEnumerable<RubyTag> GetSortedValue(IEnumerable<RubyTag> objects)
+            => TextTagsUtils.Sort(objects);
+    }
+}