diff --git a/HellionChat/Resources/HellionStrings.Designer.cs b/HellionChat/Resources/HellionStrings.Designer.cs
index 2aaddc8..a9d7037 100644
--- a/HellionChat/Resources/HellionStrings.Designer.cs
+++ b/HellionChat/Resources/HellionStrings.Designer.cs
@@ -402,4 +402,9 @@ internal class HellionStrings
 
     // Hellion Chat — v1.3.0 Honorific title slot tooltip
     internal static string ChatHeader_HonorificTitle_Tooltip => Get(nameof(ChatHeader_HonorificTitle_Tooltip));
+
+    // Hellion Chat — v1.4.8 DbViewer full-text search toggle
+    internal static string DbViewer_FullTextToggle => Get(nameof(DbViewer_FullTextToggle));
+    internal static string DbViewer_FullTextToggle_Hint_Indexing => Get(nameof(DbViewer_FullTextToggle_Hint_Indexing));
+    internal static string DbViewer_FullTextToggle_Hint_PhraseMode => Get(nameof(DbViewer_FullTextToggle_Hint_PhraseMode));
 }
diff --git a/HellionChat/Resources/HellionStrings.de.resx b/HellionChat/Resources/HellionStrings.de.resx
index e9fc2ff..59542f7 100644
--- a/HellionChat/Resources/HellionStrings.de.resx
+++ b/HellionChat/Resources/HellionStrings.de.resx
@@ -917,4 +917,13 @@
   <data name="ChatHeader_HonorificTitle_Tooltip" xml:space="preserve">
     <value>Custom-Titel von Honorific</value>
   </data>
+  <data name="DbViewer_FullTextToggle" xml:space="preserve">
+    <value>Volltext-Suche</value>
+  </data>
+  <data name="DbViewer_FullTextToggle_Hint_Indexing" xml:space="preserve">
+    <value>Der Volltext-Index wird noch gebaut. Die lokale Suche bleibt verfügbar.</value>
+  </data>
+  <data name="DbViewer_FullTextToggle_Hint_PhraseMode" xml:space="preserve">
+    <value>Sucht nach der exakten Wortfolge. Mehrere Wörter werden nur gefunden, wenn sie zusammen und in dieser Reihenfolge stehen. Wer rohe FTS5-MATCH-Syntax nutzen will, setzt eigene Anführungszeichen um den Suchbegriff.</value>
+  </data>
 </root>
diff --git a/HellionChat/Resources/HellionStrings.resx b/HellionChat/Resources/HellionStrings.resx
index 8940f46..f0a13b0 100644
--- a/HellionChat/Resources/HellionStrings.resx
+++ b/HellionChat/Resources/HellionStrings.resx
@@ -917,4 +917,13 @@
   <data name="ChatHeader_HonorificTitle_Tooltip" xml:space="preserve">
     <value>Custom title from Honorific</value>
   </data>
+  <data name="DbViewer_FullTextToggle" xml:space="preserve">
+    <value>Full-text search</value>
+  </data>
+  <data name="DbViewer_FullTextToggle_Hint_Indexing" xml:space="preserve">
+    <value>The full-text index is still being built. The local filter remains available.</value>
+  </data>
+  <data name="DbViewer_FullTextToggle_Hint_PhraseMode" xml:space="preserve">
+    <value>Searches for the exact phrase. Multi-word queries match only when the words appear together in order. To use raw FTS5 MATCH syntax, wrap your term in double quotes yourself.</value>
+  </data>
 </root>
diff --git a/HellionChat/Ui/DbViewer.cs b/HellionChat/Ui/DbViewer.cs
index 1326a29..6773fba 100644
--- a/HellionChat/Ui/DbViewer.cs
+++ b/HellionChat/Ui/DbViewer.cs
@@ -33,6 +33,12 @@ public class DbViewer : Window
 
     private int CurrentPage = 1;
     private string SimpleSearchTerm = "";
+
+    // v1.4.8 H2: opt-in full-text search across the whole DB via FTS5.
+    // Transient UI state (per-session), not persisted -- users opt in fresh
+    // every time so they always see the page-filter as the default mode.
+    private bool UseFullTextSearch;
+
     private bool OnlyCurrentCharacter = true;
     private readonly Dictionary<ChatType, (ChatSource, ChatSource)> SelectedChannels;
 
@@ -233,6 +239,24 @@ public class DbViewer : Window
             tooltipRight: Language.Page_ArrowRight_Tooltip
         );
 
+        // Full-text search toggle (v1.4.8 H2). IsFtsIndexBuilt is a cached
+        // volatile bool in MessageStore -- single field read per frame, no
+        // SELECT count(*). ImRaii.Disabled blocks any click while the index
+        // is still being built, so no defensive force-off branch needed
+        // inside the if-body. UseFullTextSearch is transient UI state, so we
+        // do not call SaveConfig here.
+        var ftsReady = Plugin.MessageManager.Store.IsFtsIndexBuilt;
+        using (ImRaii.Disabled(!ftsReady))
+        {
+            if (ImGui.Checkbox(HellionStrings.DbViewer_FullTextToggle, ref UseFullTextSearch))
+                Filtered = Filter(Messages);
+        }
+        ImGuiUtil.HelpMarker(
+            ftsReady
+                ? HellionStrings.DbViewer_FullTextToggle_Hint_PhraseMode
+                : HellionStrings.DbViewer_FullTextToggle_Hint_Indexing
+        );
+
         ImGui.SameLine(ImGui.GetContentRegionMax().X - width);
         ImGui.SetNextItemWidth(width);
         if (
@@ -452,6 +476,20 @@ public class DbViewer : Window
         if (SimpleSearchTerm == "")
             return new ConcurrentStack<Message>(messages.Reverse().OrderByDescending(m => m.Date));
 
+        // Full-text mode bypasses the page-bounded messages array and queries
+        // the FTS5 index across the whole DB. IsFtsIndexBuilt re-check guards
+        // against the (rare) case of the toggle being on while the index is
+        // mid-rebuild -- ImRaii.Disabled prevents the user from flipping it,
+        // but a Dispose-and-reopen during indexing could leave UseFullTextSearch
+        // true while ftsReady flipped back to false; the local fallback below
+        // still serves the page.
+        if (UseFullTextSearch && Plugin.MessageManager.Store.IsFtsIndexBuilt)
+        {
+            var hexIds = Plugin.MessageManager.Store.FullTextSearch(SimpleSearchTerm);
+            var resolved = Plugin.MessageManager.Store.LoadByGuids(hexIds);
+            return new ConcurrentStack<Message>(resolved.OrderByDescending(m => m.Date));
+        }
+
         return new ConcurrentStack<Message>(
             messages
                 .Reverse()