diff --git a/App.config b/App.config
index a7aaca76..ddb4269b 100644
--- a/App.config
+++ b/App.config
@@ -76,6 +76,9 @@
             <setting name="winStatusBarVisibility" serializeAs="String">
                 <value>Visible</value>
             </setting>
+            <setting name="appLastImageFormat" serializeAs="String">
+                <value>PNG</value>
+            </setting>
         </GARbro.GUI.Properties.Settings>
     </userSettings>
 </configuration>
diff --git a/ConvertImages.xaml b/ConvertImages.xaml
new file mode 100644
index 00000000..af669997
--- /dev/null
+++ b/ConvertImages.xaml
@@ -0,0 +1,28 @@
+<Window x:Class="GARbro.GUI.ConvertImages"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:s="clr-namespace:GARbro.GUI.Strings"
+        xmlns:p="clr-namespace:GARbro.GUI.Properties"
+        xmlns:g="clr-namespace:GameRes;assembly=GameRes"
+        Title="{x:Static s:guiStrings.TextConvertImages}" ShowInTaskbar="False"  WindowStartupLocation="CenterOwner"
+        ResizeMode="NoResize" SizeToContent="WidthAndHeight"
+        Background="{DynamicResource {x:Static SystemColors.ControlBrushKey}}">
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition/>
+            <RowDefinition/>
+            <RowDefinition/>
+        </Grid.RowDefinitions>
+        <StackPanel Orientation="Horizontal" Grid.Row="0" Margin="20,10,20,10">
+            <Label Content="{x:Static s:guiStrings.LabelDestinationFormat}" Target="{Binding ElementName=ImageConversionFormat}" HorizontalAlignment="Left" Padding="0,0,10,0" VerticalAlignment="Center"/>
+            <ComboBox Name="ImageConversionFormat" DisplayMemberPath="Tag" Width="60" HorizontalAlignment="Left"
+                      ItemsSource="{Binding Source={x:Static g:FormatCatalog.Instance}, Path=ImageFormats, Mode=OneWay}"
+                      SelectedValue="{Binding Source={x:Static p:Settings.Default}, Path=appLastImageFormat, Mode=TwoWay}" SelectedValuePath="Tag"/>
+        </StackPanel>
+        <Separator Grid.Row="1"/>
+        <StackPanel Orientation="Horizontal" Margin="10,0,10,10" HorizontalAlignment="Right" Grid.Row="2">
+            <Button Content="{x:Static s:guiStrings.ButtonOK}" Click="ConvertButton_Click" Margin="10" Width="75" IsDefault="True" Height="25"/>
+            <Button Content="{x:Static s:guiStrings.ButtonCancel}" Margin="10" IsCancel="True" Width="75" Height="25"/>
+        </StackPanel>
+    </Grid>
+</Window>
diff --git a/ConvertImages.xaml.cs b/ConvertImages.xaml.cs
new file mode 100644
index 00000000..19dc2c50
--- /dev/null
+++ b/ConvertImages.xaml.cs
@@ -0,0 +1,41 @@
+using System.Diagnostics;
+using System.Linq;
+using System.Windows;
+using System.Windows.Controls;
+using GameRes;
+using GARbro.GUI.Properties;
+
+namespace GARbro.GUI
+{
+    /// <summary>
+    /// Interaction logic for ConvertImages.xaml
+    /// </summary>
+    public partial class ConvertImages : Window
+    {
+        public ConvertImages ()
+        {
+            InitializeComponent ();
+            InitImageFormats (this.ImageConversionFormat);
+        }
+
+        void InitImageFormats (ComboBox image_format)
+        {
+            /*
+            var formats = FormatCatalog.Instance.ImageFormats;
+            var models = formats.Select (f => new ImageFormatModel (f)).ToList();
+            var selected_format = Settings.Default.appLastImageFormat;
+            var selected = models.FirstOrDefault (f => f.Tag.Equals (selected_format));
+            image_format.ItemsSource = models;
+            if (null != selected)
+                image_format.SelectedItem = selected;
+            else if (models.Any())
+                image_format.SelectedIndex = 0;
+            */
+        }
+
+        private void ConvertButton_Click (object sender, RoutedEventArgs e)
+        {
+            this.DialogResult = true;
+        }
+    }
+}
diff --git a/GARbro.GUI.csproj b/GARbro.GUI.csproj
index 61017c08..18915791 100644
--- a/GARbro.GUI.csproj
+++ b/GARbro.GUI.csproj
@@ -120,6 +120,9 @@
     <Compile Include="ArcParameters.xaml.cs">
       <DependentUpon>ArcParameters.xaml</DependentUpon>
     </Compile>
+    <Compile Include="ConvertImages.xaml.cs">
+      <DependentUpon>ConvertImages.xaml</DependentUpon>
+    </Compile>
     <Compile Include="CreateArchive.xaml.cs">
       <DependentUpon>CreateArchive.xaml</DependentUpon>
     </Compile>
@@ -131,6 +134,7 @@
     <Compile Include="ExtractFile.xaml.cs">
       <DependentUpon>ExtractFile.xaml</DependentUpon>
     </Compile>
+    <Compile Include="GarConvert.cs" />
     <Compile Include="GarCreate.cs" />
     <Compile Include="GarExtract.cs" />
     <Compile Include="HistoryStack.cs" />
@@ -154,6 +158,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="ConvertImages.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="CreateArchive.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
diff --git a/GarConvert.cs b/GarConvert.cs
new file mode 100644
index 00000000..c8cc1ac3
--- /dev/null
+++ b/GarConvert.cs
@@ -0,0 +1,158 @@
+//! \file       GarConvert.cs
+//! \date       Fri Aug 22 08:22:47 2014
+//! \brief      Game resources conversion methods.
+//
+
+using System;
+using System.IO;
+using System.Linq;
+using System.Windows;
+using System.Windows.Input;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Diagnostics;
+using GameRes;
+using GARbro.GUI.Strings;
+using GARbro.GUI.Properties;
+using Ookii.Dialogs.Wpf;
+
+namespace GARbro.GUI
+{
+    public partial class MainWindow : Window
+    {
+        /// <summary>
+        /// Convert selected images to another format.
+        /// </summary>
+        void ConvertImageExec (object sender, ExecutedRoutedEventArgs e)
+        {
+            if (ViewModel.IsArchive)
+                return;
+            var source = CurrentDirectory.SelectedItems.Cast<EntryViewModel>()
+                         .Where (f => f.Type == "image").Select (f => f.Name);
+            var convert_dialog = new ConvertImages();
+            convert_dialog.Owner = this;
+            var result = convert_dialog.ShowDialog() ?? false;
+            if (!result)
+                return;
+            var selected = convert_dialog.ImageConversionFormat.SelectedValue as string;
+            var format = FormatCatalog.Instance.ImageFormats.FirstOrDefault (f => f.Tag == selected);
+            if (null == format)
+            {
+                Trace.WriteLine ("Format is not selected", "ConvertImageExec");
+                return;
+            }
+            try
+            {
+                Directory.SetCurrentDirectory (ViewModel.Path);
+                var converter = new GarConvertImages (this);
+                converter.Convert (source, format);
+            }
+            catch (Exception X)
+            {
+                PopupError (X.Message, guiStrings.TextImageConvertError);
+            }
+        }
+    }
+
+    internal class GarConvertImages
+    {
+        private MainWindow      m_main;
+        private ProgressDialog  m_progress_dialog;
+        private IEnumerable<string> m_source;
+        private ImageFormat     m_image_format;
+        private Exception       m_pending_error;
+
+        public bool IgnoreErrors { get; set; }
+
+        public GarConvertImages (MainWindow parent)
+        {
+            m_main = parent;
+        }
+
+        public void Convert (IEnumerable<string> images, ImageFormat format)
+        {
+            m_main.StopWatchDirectoryChanges();
+            m_source = images;
+            m_image_format = format;
+            m_progress_dialog = new ProgressDialog ()
+            {
+                WindowTitle = guiStrings.TextTitle,
+                Text        = "Converting image",
+                Description = "",
+                MinimizeBox = true,
+            };
+            m_progress_dialog.DoWork += ConvertWorker;
+            m_progress_dialog.RunWorkerCompleted += OnConvertComplete;
+            m_progress_dialog.ShowDialog (m_main);
+        }
+
+        void ConvertWorker (object sender, DoWorkEventArgs e)
+        {
+            m_pending_error = null;
+            try
+            {
+                string target_ext = m_image_format.Extensions.First();
+                int total = m_source.Count();
+                int i = 0;
+                foreach (var filename in m_source)
+                {
+                    if (m_progress_dialog.CancellationPending)
+                        throw new OperationCanceledException();
+                    int progress = i++*100/total;
+                    string target_name = Path.ChangeExtension (filename, target_ext);
+                    if (filename == target_name)
+                        continue;
+                    string source_ext = Path.GetExtension (filename).TrimStart ('.').ToLowerInvariant();
+                    if (m_image_format.Extensions.Any (ext => ext == source_ext))
+                        continue;
+                    try
+                    {
+                        using (var file = File.OpenRead (filename))
+                        {
+                            m_progress_dialog.ReportProgress (progress, string.Format (guiStrings.MsgConvertingImage,
+                                filename), target_name);
+                            var image = ImageFormat.Read (file);
+                            if (null == image)
+                                continue;
+                            try
+                            {
+                                using (var output = File.Create (target_name))
+                                    m_image_format.Write (output, image);
+                            }
+                            catch // delete destination file on conversion failure
+                            {
+                                File.Delete (target_name);
+                                throw;
+                            }
+                        }
+                    }
+                    catch (Exception X)
+                    {
+                        if (!IgnoreErrors)
+                            throw;
+                        m_pending_error = X;
+                    }
+                }
+            }
+            catch (Exception X)
+            {
+                m_pending_error = X;
+            }
+        }
+
+        void OnConvertComplete (object sender, RunWorkerCompletedEventArgs e)
+        {
+            m_main.ResumeWatchDirectoryChanges();
+            m_progress_dialog.Dispose();
+            if (null != m_pending_error)
+            {
+                if (m_pending_error is OperationCanceledException)
+                    m_main.SetStatusText (m_pending_error.Message);
+                else
+                    m_main.PopupError (m_pending_error.Message, guiStrings.TextImageConvertError);
+            }
+            m_main.Activate();
+            m_main.RefreshView();
+        }
+    }
+}
diff --git a/MainWindow.xaml b/MainWindow.xaml
index 3feefd0d..fa16fde2 100644
--- a/MainWindow.xaml
+++ b/MainWindow.xaml
@@ -90,6 +90,9 @@
             -->
             <MenuItem Header="{x:Static s:guiStrings.CtxMenuRefresh}" InputGestureText="F5"
                       Command="{x:Static local:Commands.Refresh}"/>
+            <MenuItem Header="{x:Static s:guiStrings.CtxMenuConvert}" InputGestureText="F6"
+                      Visibility="{Binding Path=IsEnabled, RelativeSource={RelativeSource Self}, Mode=OneWay, Converter={StaticResource booleanToCollapsedVisibilityConverter}}"
+                      Command="{x:Static local:Commands.ConvertImage}" />
         </ContextMenu>
 
     </Window.Resources>
@@ -356,6 +359,7 @@
         <CommandBinding Command="{x:Static local:Commands.DeleteItem}" Executed="DeleteItemExec" CanExecute="CanExecuteOnPhysicalFile" />
         <CommandBinding Command="{x:Static local:Commands.RenameItem}" Executed="RenameItemExec" CanExecute="CanExecuteInDirectory" />
         <CommandBinding Command="{x:Static local:Commands.ExploreItem}" Executed="ExploreItemExec" CanExecute="CanExecuteInDirectory" />
+        <CommandBinding Command="{x:Static local:Commands.ConvertImage}" Executed="ConvertImageExec" CanExecute="CanExecuteOnImage" />
         <CommandBinding Command="{x:Static local:Commands.SortBy}"     Executed="SortByExec"     CanExecute="CanExecuteAlways"/>
         <CommandBinding Command="{x:Static local:Commands.GoBack}"     Executed="GoBackExec"     CanExecute="CanExecuteGoBack"/>
         <CommandBinding Command="{x:Static local:Commands.GoForward}"  Executed="GoForwardExec"  CanExecute="CanExecuteGoForward"/>
diff --git a/MainWindow.xaml.cs b/MainWindow.xaml.cs
index 3a04a097..7a2db48e 100644
--- a/MainWindow.xaml.cs
+++ b/MainWindow.xaml.cs
@@ -289,12 +289,12 @@ namespace GARbro.GUI
             m_watcher.EnableRaisingEvents = true;
         }
 
-        void StopWatchDirectoryChanges()
+        public void StopWatchDirectoryChanges()
         {
             m_watcher.EnableRaisingEvents = false;
         }
 
-        void ResumeWatchDirectoryChanges ()
+        public void ResumeWatchDirectoryChanges ()
         {
             m_watcher.EnableRaisingEvents = true;
         }
@@ -794,7 +794,7 @@ namespace GARbro.GUI
             RefreshView();
         }
 
-        private void RefreshView ()
+        public void RefreshView ()
         {
             m_app.ResetCache();
             var pos = GetCurrentPosition();
@@ -962,6 +962,12 @@ namespace GARbro.GUI
             e.CanExecute = CurrentDirectory.SelectedIndex != -1;
         }
 
+        private void CanExecuteOnImage (object sender, CanExecuteRoutedEventArgs e)
+        {
+            var entry = CurrentDirectory.SelectedItem as EntryViewModel;
+            e.CanExecute = !ViewModel.IsArchive && entry != null && entry.Type == "image";
+        }
+
         private void CanExecuteInArchive (object sender, CanExecuteRoutedEventArgs e)
         {
             e.CanExecute = ViewModel.IsArchive && CurrentDirectory.SelectedIndex != -1;
@@ -1171,6 +1177,7 @@ namespace GARbro.GUI
         public static readonly RoutedCommand DeleteItem = new RoutedCommand();
         public static readonly RoutedCommand RenameItem = new RoutedCommand();
         public static readonly RoutedCommand ExploreItem = new RoutedCommand();
+        public static readonly RoutedCommand ConvertImage = new RoutedCommand();
         public static readonly RoutedCommand Refresh = new RoutedCommand();
         public static readonly RoutedCommand Browse = new RoutedCommand();
         public static readonly RoutedCommand FitWindow = new RoutedCommand();
diff --git a/Properties/Settings.Designer.cs b/Properties/Settings.Designer.cs
index bf402948..a98d5392 100644
--- a/Properties/Settings.Designer.cs
+++ b/Properties/Settings.Designer.cs
@@ -297,5 +297,17 @@ namespace GARbro.GUI.Properties {
                 this["winStatusBarVisibility"] = value;
             }
         }
+        
+        [global::System.Configuration.UserScopedSettingAttribute()]
+        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [global::System.Configuration.DefaultSettingValueAttribute("PNG")]
+        public string appLastImageFormat {
+            get {
+                return ((string)(this["appLastImageFormat"]));
+            }
+            set {
+                this["appLastImageFormat"] = value;
+            }
+        }
     }
 }
diff --git a/Properties/Settings.settings b/Properties/Settings.settings
index 3b4f1e7b..34934d30 100644
--- a/Properties/Settings.settings
+++ b/Properties/Settings.settings
@@ -71,5 +71,8 @@
     <Setting Name="winStatusBarVisibility" Type="System.Windows.Visibility" Scope="User">
       <Value Profile="(Default)">Visible</Value>
     </Setting>
+    <Setting Name="appLastImageFormat" Type="System.String" Scope="User">
+      <Value Profile="(Default)">PNG</Value>
+    </Setting>
   </Settings>
 </SettingsFile>
\ No newline at end of file
diff --git a/Strings/guiStrings.Designer.cs b/Strings/guiStrings.Designer.cs
index 171551f3..79295ca0 100644
--- a/Strings/guiStrings.Designer.cs
+++ b/Strings/guiStrings.Designer.cs
@@ -69,6 +69,15 @@ namespace GARbro.GUI.Strings {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Convert.
+        /// </summary>
+        public static string ButtonConvert {
+            get {
+                return ResourceManager.GetString("ButtonConvert", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Extract.
         /// </summary>
@@ -96,6 +105,15 @@ namespace GARbro.GUI.Strings {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Convert images....
+        /// </summary>
+        public static string CtxMenuConvert {
+            get {
+                return ResourceManager.GetString("CtxMenuConvert", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Copy.
         /// </summary>
@@ -285,6 +303,15 @@ namespace GARbro.GUI.Strings {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Choose destination format.
+        /// </summary>
+        public static string LabelDestinationFormat {
+            get {
+                return ResourceManager.GetString("LabelDestinationFormat", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Extract files from {0} to.
         /// </summary>
@@ -420,6 +447,15 @@ namespace GARbro.GUI.Strings {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Converting image {0}.
+        /// </summary>
+        public static string MsgConvertingImage {
+            get {
+                return ResourceManager.GetString("MsgConvertingImage", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Creating archive {0}.
         /// </summary>
@@ -711,6 +747,15 @@ namespace GARbro.GUI.Strings {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Convert images.
+        /// </summary>
+        public static string TextConvertImages {
+            get {
+                return ResourceManager.GetString("TextConvertImages", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Create archive.
         /// </summary>
@@ -774,6 +819,15 @@ namespace GARbro.GUI.Strings {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Image conversion error.
+        /// </summary>
+        public static string TextImageConvertError {
+            get {
+                return ResourceManager.GetString("TextImageConvertError", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Archive parameters.
         /// </summary>
diff --git a/Strings/guiStrings.resx b/Strings/guiStrings.resx
index d786285c..497c5bd6 100644
--- a/Strings/guiStrings.resx
+++ b/Strings/guiStrings.resx
@@ -378,4 +378,22 @@ Overwrite?</value>
   <data name="MenuView" xml:space="preserve">
     <value>_View</value>
   </data>
+  <data name="CtxMenuConvert" xml:space="preserve">
+    <value>Convert images...</value>
+  </data>
+  <data name="ButtonConvert" xml:space="preserve">
+    <value>Convert</value>
+  </data>
+  <data name="LabelDestinationFormat" xml:space="preserve">
+    <value>Choose destination format</value>
+  </data>
+  <data name="TextConvertImages" xml:space="preserve">
+    <value>Convert images</value>
+  </data>
+  <data name="MsgConvertingImage" xml:space="preserve">
+    <value>Converting image {0}</value>
+  </data>
+  <data name="TextImageConvertError" xml:space="preserve">
+    <value>Image conversion error</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/Strings/guiStrings.ru-RU.resx b/Strings/guiStrings.ru-RU.resx
index 3c2209cc..05d411cf 100644
--- a/Strings/guiStrings.ru-RU.resx
+++ b/Strings/guiStrings.ru-RU.resx
@@ -393,4 +393,22 @@
   <data name="MenuView" xml:space="preserve">
     <value>Просмотр</value>
   </data>
+  <data name="CtxMenuConvert" xml:space="preserve">
+    <value>Конверсия изображений...</value>
+  </data>
+  <data name="ButtonConvert" xml:space="preserve">
+    <value>Преобразовать</value>
+  </data>
+  <data name="LabelDestinationFormat" xml:space="preserve">
+    <value>Формат преобразования</value>
+  </data>
+  <data name="TextConvertImages" xml:space="preserve">
+    <value>Преобразовать изображения</value>
+  </data>
+  <data name="MsgConvertingImage" xml:space="preserve">
+    <value>Преобразование файла {0}</value>
+  </data>
+  <data name="TextImageConvertError" xml:space="preserve">
+    <value>Ошибка конверсии изображения</value>
+  </data>
 </root>
\ No newline at end of file