diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/ModbusDriverPage.razor b/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/ModbusDriverPage.razor
index bc852c06..94e44026 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/ModbusDriverPage.razor
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/Clusters/Drivers/ModbusDriverPage.razor
@@ -273,16 +273,44 @@ else
                 </div>
             </section>
 
-            @* Tags — read-only JSON view *@
-            <section class="panel rise mt-3" style="animation-delay:.18s">
-                <div class="panel-head">Tags</div>
-                <div style="padding:1rem">
-                    <p class="form-text mb-2">
-                        Tag list — full list-editor coming in a follow-up phase. Edit tags via the Tag editor pages or by exporting/importing the driver config JSON.
-                    </p>
-                    <pre class="form-control form-control-sm mono" style="min-height:4rem;overflow:auto;white-space:pre-wrap;">@_tagsJson</pre>
-                </div>
-            </section>
+            <CollectionEditor TRow="ModbusTagRow" Items="_tags" Title="Tags" ItemNoun="tag"
+                              NewRow="@(() => new ModbusTagRow())" Clone="@(r => r.Clone())"
+                              Validate="ModbusTagRow.ValidateRow">
+                <HeaderTemplate>
+                    <tr><th>Name</th><th>Region</th><th>Address</th><th>Type</th><th>Writable</th><th></th></tr>
+                </HeaderTemplate>
+                <RowTemplate Context="t">
+                    <td class="mono">@t.Name</td><td>@t.Region</td><td class="mono">@t.Address</td>
+                    <td>@t.DataType</td><td>@(t.Writable ? "yes" : "no")</td>
+                </RowTemplate>
+                <EditTemplate Context="t">
+                    <div class="row g-3">
+                        <div class="col-md-6"><label class="form-label">Name</label>
+                            <input class="form-control form-control-sm" @bind="t.Name" /></div>
+                        <div class="col-md-3"><label class="form-label">Region</label>
+                            <select class="form-select form-select-sm" @bind="t.Region">
+                                @foreach (var e in Enum.GetValues<ModbusRegion>()) { <option value="@e">@e</option> }
+                            </select></div>
+                        <div class="col-md-3"><label class="form-label">Address</label>
+                            <input type="number" class="form-control form-control-sm" @bind="t.Address" /></div>
+                        <div class="col-md-3"><label class="form-label">Data type</label>
+                            <select class="form-select form-select-sm" @bind="t.DataType">
+                                @foreach (var e in Enum.GetValues<ModbusDataType>()) { <option value="@e">@e</option> }
+                            </select></div>
+                        <div class="col-md-3"><label class="form-label">Byte order</label>
+                            <select class="form-select form-select-sm" @bind="t.ByteOrder">
+                                @foreach (var e in Enum.GetValues<ModbusByteOrder>()) { <option value="@e">@e</option> }
+                            </select></div>
+                        <div class="col-md-2"><label class="form-label">Bit index</label>
+                            <input type="number" class="form-control form-control-sm" @bind="t.BitIndex" /></div>
+                        <div class="col-md-2"><label class="form-label">String len</label>
+                            <input type="number" class="form-control form-control-sm" @bind="t.StringLength" /></div>
+                        <div class="col-md-2"><div class="form-check form-switch mt-4">
+                            <input type="checkbox" class="form-check-input" @bind="t.Writable" id="tagWritable" />
+                            <label class="form-check-label" for="tagWritable">Writable</label></div></div>
+                    </div>
+                </EditTemplate>
+            </CollectionEditor>
 
             <DriverResilienceSection @bind-ResilienceConfig="_form.ResilienceConfig" />
         </DriverFormShell>
@@ -318,9 +346,8 @@ else
 
     private void OnAddressPicked(string address) => _pickedAddress = address;
 
-    // Held separately because Tags is a collection — rendered as read-only JSON.
-    private IReadOnlyList<ModbusTagDefinition> _tags = [];
-    private string _tagsJson = "[]";
+    // Held separately because Tags is a collection — edited via the CollectionEditor modal.
+    private List<ModbusTagRow> _tags = [];
 
     protected override async Task OnInitializedAsync()
     {
@@ -360,10 +387,9 @@ else
                 _form = FormModel.FromOptions(opts);
                 _form.ResilienceConfig = _existing.ResilienceConfig;
                 _form.RowVersion = _existing.RowVersion;
-                _tags = opts.Tags;
+                _tags = opts.Tags.Select(ModbusTagRow.FromDefinition).ToList();
             }
         }
-        _tagsJson = System.Text.Json.JsonSerializer.Serialize(_tags, _jsonOpts);
         _loaded = true;
     }
 
@@ -372,7 +398,7 @@ else
         _busy = true; _error = null;
         try
         {
-            var configJson = System.Text.Json.JsonSerializer.Serialize(_form.ToOptions(_tags), _jsonOpts);
+            var configJson = System.Text.Json.JsonSerializer.Serialize(_form.ToOptions(_tags.Select(r => r.ToDefinition()).ToList()), _jsonOpts);
             await using var db = await DbFactory.CreateDbContextAsync();
             if (IsNew)
             {
@@ -443,7 +469,7 @@ else
     }
 
     private string SerializeCurrentConfig()
-        => System.Text.Json.JsonSerializer.Serialize(_form.ToOptions(_tags), _jsonOpts);
+        => System.Text.Json.JsonSerializer.Serialize(_form.ToOptions(_tags.Select(r => r.ToDefinition()).ToList()), _jsonOpts);
 
     private static ModbusDriverOptions? TryDeserialize(string json)
     {
@@ -451,6 +477,44 @@ else
         catch { return null; }
     }
 
+    // Mutable VM for the modal editor — ModbusTagDefinition is an immutable record.
+    public sealed class ModbusTagRow
+    {
+        public string Name { get; set; } = "";
+        public ModbusRegion Region { get; set; } = ModbusRegion.HoldingRegisters;
+        public int Address { get; set; }
+        public ModbusDataType DataType { get; set; } = ModbusDataType.Int16;
+        public bool Writable { get; set; } = true;
+        public ModbusByteOrder ByteOrder { get; set; } = ModbusByteOrder.BigEndian;
+        public int BitIndex { get; set; }
+        public int StringLength { get; set; }
+        public bool WriteIdempotent { get; set; }
+
+        public ModbusTagRow Clone() => (ModbusTagRow)MemberwiseClone();
+
+        public static ModbusTagRow FromDefinition(ModbusTagDefinition d) => new()
+        {
+            Name = d.Name, Region = d.Region, Address = d.Address, DataType = d.DataType,
+            Writable = d.Writable, ByteOrder = d.ByteOrder, BitIndex = d.BitIndex,
+            StringLength = d.StringLength, WriteIdempotent = d.WriteIdempotent,
+        };
+
+        public ModbusTagDefinition ToDefinition() => new(
+            Name: Name.Trim(), Region: Region, Address: (ushort)Math.Clamp(Address, 0, 65535),
+            DataType: DataType, Writable: Writable, ByteOrder: ByteOrder,
+            BitIndex: (byte)Math.Clamp(BitIndex, 0, 255), StringLength: (ushort)Math.Clamp(StringLength, 0, 65535),
+            WriteIdempotent: WriteIdempotent);
+
+        public static string? ValidateRow(ModbusTagRow row, IReadOnlyList<ModbusTagRow> all, int? editIndex)
+        {
+            if (string.IsNullOrWhiteSpace(row.Name)) return "Name is required.";
+            for (var i = 0; i < all.Count; i++)
+                if (i != editIndex && string.Equals(all[i].Name, row.Name, StringComparison.OrdinalIgnoreCase))
+                    return $"Duplicate tag name '{row.Name}'.";
+            return null;
+        }
+    }
+
     // Flat mutable model — all scalars exposed as settable properties so Blazor @bind-Value works.
     // Collection (Tags) is kept on the component (_tags) and passed in when building the final Options.
     public sealed class FormModel
diff --git a/tests/Server/ZB.MOM.WW.OtOpcUa.AdminUI.Tests/ModbusDriverPageFormSerializationTests.cs b/tests/Server/ZB.MOM.WW.OtOpcUa.AdminUI.Tests/ModbusDriverPageFormSerializationTests.cs
index abc2f5eb..542e6a6a 100644
--- a/tests/Server/ZB.MOM.WW.OtOpcUa.AdminUI.Tests/ModbusDriverPageFormSerializationTests.cs
+++ b/tests/Server/ZB.MOM.WW.OtOpcUa.AdminUI.Tests/ModbusDriverPageFormSerializationTests.cs
@@ -2,6 +2,7 @@ using System.Text.Json;
 using System.Text.Json.Serialization;
 using Shouldly;
 using Xunit;
+using ZB.MOM.WW.OtOpcUa.AdminUI.Components.Pages.Clusters.Drivers;
 using ZB.MOM.WW.OtOpcUa.Driver.Modbus;
 
 namespace ZB.MOM.WW.OtOpcUa.AdminUI.Tests;
@@ -14,6 +15,12 @@ public sealed class ModbusDriverPageFormSerializationTests
         WriteIndented = false,
     };
 
+    private static readonly JsonSerializerOptions TestJsonOpts = new()
+    {
+        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+        UnmappedMemberHandling = JsonUnmappedMemberHandling.Skip,
+    };
+
     [Fact]
     public void RoundTrip_PreservesKnownFields()
     {
@@ -104,4 +111,44 @@ public sealed class ModbusDriverPageFormSerializationTests
         back.ShouldNotBeNull();
         back.ProbeTimeoutSeconds.ShouldBe(10);
     }
+
+    [Fact]
+    public void TagRow_round_trips_through_definition()
+    {
+        var row = new ModbusDriverPage.ModbusTagRow
+        {
+            Name = "Pump1_Speed", Region = ModbusRegion.HoldingRegisters, Address = 40001,
+            DataType = ModbusDataType.Int16, Writable = true,
+        };
+        var def = row.ToDefinition();
+        var back = ModbusDriverPage.ModbusTagRow.FromDefinition(def);
+
+        back.Name.ShouldBe("Pump1_Speed");
+        back.Address.ShouldBe(40001);
+        back.DataType.ShouldBe(ModbusDataType.Int16);
+        back.Writable.ShouldBeTrue();
+    }
+
+    [Fact]
+    public void Tag_list_survives_options_serialize_round_trip()
+    {
+        var tags = new List<ModbusTagDefinition>
+        {
+            new("A", ModbusRegion.HoldingRegisters, 1, ModbusDataType.Int16),
+            new("B", ModbusRegion.Coils, 2, ModbusDataType.Bool),
+        };
+        var opts = new ModbusDriverPage.FormModel().ToOptions(tags);
+        var json = JsonSerializer.Serialize(opts, TestJsonOpts);
+        var back = JsonSerializer.Deserialize<ModbusDriverOptions>(json, TestJsonOpts)!;
+        back.Tags.Count.ShouldBe(2);
+        back.Tags[0].Name.ShouldBe("A");
+    }
+
+    [Fact]
+    public void ValidateRow_rejects_duplicate_name()
+    {
+        var rows = new List<ModbusDriverPage.ModbusTagRow> { new() { Name = "A" } };
+        ModbusDriverPage.ModbusTagRow.ValidateRow(new() { Name = "A" }, rows, null)
+            .ShouldNotBeNull();
+    }
 }