diff --git a/TablePro/ContentView.swift b/TablePro/ContentView.swift
index 6e9d26dbd..14bbd13c0 100644
--- a/TablePro/ContentView.swift
+++ b/TablePro/ContentView.swift
@@ -257,33 +257,40 @@ struct ContentView: View {
                 .navigationSplitViewColumnWidth(min: 200, ideal: 250, max: 600)
             } detail: {
                 // MARK: - Detail (Main workspace with optional right sidebar)
-                MainContentView(
-                    connection: currentSession.connection,
-                    payload: payload,
-                    windowTitle: $windowTitle,
-                    tables: sessionTablesBinding,
-                    sidebarState: SharedSidebarState.forConnection(currentSession.connection.id),
-                    pendingTruncates: sessionPendingTruncatesBinding,
-                    pendingDeletes: sessionPendingDeletesBinding,
-                    tableOperationOptions: sessionTableOperationOptionsBinding,
-                    inspectorContext: $inspectorContext,
-                    rightPanelState: rightPanelState,
-                    tabManager: sessionState.tabManager,
-                    changeManager: sessionState.changeManager,
-                    filterStateManager: sessionState.filterStateManager,
-                    toolbarState: sessionState.toolbarState,
-                    coordinator: sessionState.coordinator
-                )
-                .inspector(isPresented: Bindable(rightPanelState).isPresented) {
-                    UnifiedRightPanelView(
-                        state: rightPanelState,
-                        inspectorContext: inspectorContext,
+                HStack(spacing: 0) {
+                    MainContentView(
                         connection: currentSession.connection,
-                        tables: currentSession.tables
+                        payload: payload,
+                        windowTitle: $windowTitle,
+                        tables: sessionTablesBinding,
+                        sidebarState: SharedSidebarState.forConnection(currentSession.connection.id),
+                        pendingTruncates: sessionPendingTruncatesBinding,
+                        pendingDeletes: sessionPendingDeletesBinding,
+                        tableOperationOptions: sessionTableOperationOptionsBinding,
+                        inspectorContext: $inspectorContext,
+                        rightPanelState: rightPanelState,
+                        tabManager: sessionState.tabManager,
+                        changeManager: sessionState.changeManager,
+                        filterStateManager: sessionState.filterStateManager,
+                        toolbarState: sessionState.toolbarState,
+                        coordinator: sessionState.coordinator
                     )
-                    .frame(minWidth: 280, maxWidth: 500)
-                    .inspectorColumnWidth(min: 280, ideal: 320, max: 500)
+                    .frame(maxWidth: .infinity)
+
+                    if rightPanelState.isPresented {
+                        PanelResizeHandle(panelWidth: Bindable(rightPanelState).panelWidth)
+                        Divider()
+                        UnifiedRightPanelView(
+                            state: rightPanelState,
+                            inspectorContext: inspectorContext,
+                            connection: currentSession.connection,
+                            tables: currentSession.tables
+                        )
+                        .frame(width: rightPanelState.panelWidth)
+                        .transition(.move(edge: .trailing))
+                    }
                 }
+                .animation(.easeInOut(duration: 0.2), value: rightPanelState.isPresented)
             }
             .navigationTitle(windowTitle)
             .navigationSubtitle(currentSession.connection.name)
diff --git a/TablePro/Models/UI/RightPanelState.swift b/TablePro/Models/UI/RightPanelState.swift
index d7afdf805..4c0888168 100644
--- a/TablePro/Models/UI/RightPanelState.swift
+++ b/TablePro/Models/UI/RightPanelState.swift
@@ -12,8 +12,13 @@ import os
 
 @MainActor @Observable final class RightPanelState {
     private static let isPresentedKey = "com.TablePro.rightPanel.isPresented"
+    private static let panelWidthKey = "com.TablePro.rightPanel.width"
     private static let isPresentedChangedNotification = Notification.Name("com.TablePro.rightPanel.isPresentedChanged")
     private var isSyncing = false
+
+    static let minWidth: CGFloat = 280
+    static let maxWidth: CGFloat = 500
+    static let defaultWidth: CGFloat = 320
     @ObservationIgnored private let _didTeardown = OSAllocatedUnfairLock(initialState: false)
 
     var isPresented: Bool {
@@ -26,6 +31,14 @@ import os
         }
     }
 
+    var panelWidth: CGFloat {
+        didSet {
+            let clamped = min(max(panelWidth, Self.minWidth), Self.maxWidth)
+            if panelWidth != clamped { panelWidth = clamped }
+            UserDefaults.standard.set(Double(clamped), forKey: Self.panelWidthKey)
+        }
+    }
+
     var activeTab: RightPanelTab = .details
 
     // Save closure — set by MainContentCommandActions, called by UnifiedRightPanelView
@@ -43,6 +56,8 @@ import os
 
     init() {
         self.isPresented = UserDefaults.standard.bool(forKey: Self.isPresentedKey)
+        let savedWidth = UserDefaults.standard.double(forKey: Self.panelWidthKey)
+        self.panelWidth = savedWidth > 0 ? min(max(savedWidth, Self.minWidth), Self.maxWidth) : Self.defaultWidth
         NotificationCenter.default.addObserver(
             self,
             selector: #selector(handleIsPresentedChanged(_:)),
diff --git a/TablePro/Views/Components/PanelResizeHandle.swift b/TablePro/Views/Components/PanelResizeHandle.swift
new file mode 100644
index 000000000..6f8531c6b
--- /dev/null
+++ b/TablePro/Views/Components/PanelResizeHandle.swift
@@ -0,0 +1,40 @@
+//
+//  PanelResizeHandle.swift
+//  TablePro
+//
+//  Draggable resize handle for the right panel.
+//
+
+import SwiftUI
+
+struct PanelResizeHandle: View {
+    @Binding var panelWidth: CGFloat
+
+    @State private var isDragging = false
+
+    var body: some View {
+        Rectangle()
+            .fill(Color.clear)
+            .frame(width: 5)
+            .contentShape(Rectangle())
+            .onHover { hovering in
+                if hovering {
+                    NSCursor.resizeLeftRight.push()
+                } else {
+                    NSCursor.pop()
+                }
+            }
+            .gesture(
+                DragGesture(minimumDistance: 1)
+                    .onChanged { value in
+                        isDragging = true
+                        // Dragging left increases panel width (handle is on the leading edge)
+                        let newWidth = panelWidth - value.translation.width
+                        panelWidth = min(max(newWidth, RightPanelState.minWidth), RightPanelState.maxWidth)
+                    }
+                    .onEnded { _ in
+                        isDragging = false
+                    }
+            )
+    }
+}