diff --git a/SourceGenWPF/MainController.cs b/SourceGenWPF/MainController.cs
index a2cf846..5722231 100644
--- a/SourceGenWPF/MainController.cs
+++ b/SourceGenWPF/MainController.cs
@@ -2211,6 +2211,39 @@ namespace SourceGenWPF {
             return -1;
         }
 
+        public void ShowFileHexDump() {
+            OpenFileDialog fileDlg = new OpenFileDialog() {
+                Filter = Res.Strings.FILE_FILTER_ALL,
+                FilterIndex = 1
+            };
+            if (fileDlg.ShowDialog() != true) {
+                return;
+            }
+            string fileName = fileDlg.FileName;
+            FileInfo fi = new FileInfo(fileName);
+            if (fi.Length > Tools.WpfGui.HexDumpViewer.MAX_LENGTH) {
+                string msg = string.Format(Res.Strings.OPEN_DATA_TOO_LARGE_FMT,
+                    fi.Length / 1024, Tools.WpfGui.HexDumpViewer.MAX_LENGTH / 1024);
+                MessageBox.Show(msg, Res.Strings.OPEN_DATA_FAIL_CAPTION,
+                    MessageBoxButton.OK, MessageBoxImage.Error);
+                return;
+            }
+            byte[] data;
+            try {
+                data = File.ReadAllBytes(fileName);
+            } catch (Exception ex) {
+                // not expecting this to happen
+                MessageBox.Show(ex.Message);
+                return;
+            }
+
+            // Fire and forget.
+            Tools.WpfGui.HexDumpViewer dlg = new Tools.WpfGui.HexDumpViewer(mMainWin,
+                data, mOutputFormatter);
+            dlg.SetFileName(Path.GetFileName(fileName));
+            dlg.Show();
+        }
+
         public void ShowHexDump() {
             if (mHexDumpDialog == null) {
                 // Create and show modeless dialog.  This one is "always on top" by default,
diff --git a/SourceGenWPF/Res/Strings.xaml b/SourceGenWPF/Res/Strings.xaml
index 7d4d60d..4487692 100644
--- a/SourceGenWPF/Res/Strings.xaml
+++ b/SourceGenWPF/Res/Strings.xaml
@@ -79,7 +79,7 @@ limitations under the License.
     <system:String x:Key="str_OpenDataFailMessage">Unable to load contents of data file</system:String>
     <system:String x:Key="str_OpenDataLoadFailedFmt">The file could not be opened: {0}.</system:String>
     <system:String x:Key="str_OpenDataPartialRead">Unable to read the entire file</system:String>
-    <system:String x:Key="str_OpenDataTooLargeFmt">File is too large ({0:N0} KiB, {1:N0} KiB max).</system:String>
+    <system:String x:Key="str_OpenDataTooLargeFmt">File is too large ({0:N0} KiB, max is {1:N0} KiB).</system:String>
     <system:String x:Key="str_OpenDataWrongLengthFmt">The file is {0:N0} bytes long, but the project expected {1:N0}.</system:String>
     <system:String x:Key="str_OpenDataWrongCrcFmt">The file has CRC {0}, but the project expected {1}.</system:String>
     <system:String x:Key="str_OperationFailed">Failed</system:String>
diff --git a/SourceGenWPF/Tools/WpfGui/HexDumpViewer.xaml.cs b/SourceGenWPF/Tools/WpfGui/HexDumpViewer.xaml.cs
index 3e61d2a..a7f93ab 100644
--- a/SourceGenWPF/Tools/WpfGui/HexDumpViewer.xaml.cs
+++ b/SourceGenWPF/Tools/WpfGui/HexDumpViewer.xaml.cs
@@ -125,6 +125,13 @@ namespace SourceGenWPF.Tools.WpfGui {
         //    Debug.WriteLine("Column width: " + hexDumpData.Columns[0].ActualWidth);
         //}
 
+        /// <summary>
+        /// Sets the filename associated with the data.  This is for display purposes only.
+        /// </summary>
+        public void SetFileName(string fileName) {
+            Title = fileName;
+        }
+
         private void CharConvComboBox_SelectionChanged(object sender,
                 SelectionChangedEventArgs e) {
             ReplaceFormatter();
diff --git a/SourceGenWPF/WpfGui/MainWindow.xaml b/SourceGenWPF/WpfGui/MainWindow.xaml
index 34ad23a..97c6ad2 100644
--- a/SourceGenWPF/WpfGui/MainWindow.xaml
+++ b/SourceGenWPF/WpfGui/MainWindow.xaml
@@ -121,6 +121,7 @@ limitations under the License.
                     <KeyGesture>Ctrl+A</KeyGesture>
                 </RoutedUICommand.InputGestures>
             </RoutedUICommand>
+            <RoutedUICommand x:Key="ShowFileHexDumpCmd" Text="Hex Dump..."/>
             <RoutedUICommand x:Key="ShowHexDumpCmd" Text="Show Hex Dump"/>
             <RoutedUICommand x:Key="ToggleDataScanCmd" Text="Toggle Data Scan">
                 <RoutedUICommand.InputGestures>
@@ -204,6 +205,8 @@ limitations under the License.
         <!-- ListView has a built-in Ctrl+A handler; this only fires when codeListView is not in focus -->
         <CommandBinding Command="{StaticResource SelectAllCmd}"
                         CanExecute="IsProjectOpen" Executed="SelectAllCmd_Executed"/>
+        <CommandBinding Command="{StaticResource ShowFileHexDumpCmd}"
+                        Executed="ShowFileHexDumpCmd_Executed"/>
         <CommandBinding Command="{StaticResource ShowHexDumpCmd}"
                         CanExecute="IsProjectOpen" Executed="ShowHexDumpCmd_Executed"/>
         <CommandBinding Command="{StaticResource ToggleDataScanCmd}"
@@ -272,7 +275,7 @@ limitations under the License.
                 <MenuItem Command="{StaticResource ShowHexDumpCmd}"/>
             </MenuItem>
             <MenuItem Header="_Tools">
-                <MenuItem Header="Hex Dump..."/>
+                <MenuItem Command="{StaticResource ShowFileHexDumpCmd}"/>
                 <MenuItem Header="ASCII Chart"/>
             </MenuItem>
             <MenuItem Header="_Help">
diff --git a/SourceGenWPF/WpfGui/MainWindow.xaml.cs b/SourceGenWPF/WpfGui/MainWindow.xaml.cs
index cc14d81..b92ed85 100644
--- a/SourceGenWPF/WpfGui/MainWindow.xaml.cs
+++ b/SourceGenWPF/WpfGui/MainWindow.xaml.cs
@@ -987,6 +987,10 @@ namespace SourceGenWPF.WpfGui {
             Debug.WriteLine("Select All cmd: " + (DateTime.Now - start).TotalMilliseconds + " ms");
         }
 
+        private void ShowFileHexDumpCmd_Executed(object sender, ExecutedRoutedEventArgs e) {
+            mMainCtrl.ShowFileHexDump();
+        }
+
         private void ShowHexDumpCmd_Executed(object sender, ExecutedRoutedEventArgs e) {
             mMainCtrl.ShowHexDump();
         }