diff --git a/Mk0.Tools.Images/GetImageFormat.cs b/Mk0.Tools.Images/GetImageFormat.cs
new file mode 100644
index 0000000..c5e2df1
--- /dev/null
+++ b/Mk0.Tools.Images/GetImageFormat.cs
@@ -0,0 +1,31 @@
+using System.Drawing.Imaging;
+
+namespace Mk0.Tools.Images
+{
+    public static class ImagesFormat
+    {
+        public static string GetImageFormat(this System.Drawing.Image img)
+        {
+            if (img.RawFormat.Equals(ImageFormat.Jpeg))
+                return ".jpg";
+            if (img.RawFormat.Equals(ImageFormat.Bmp))
+                return ".bmp";
+            if (img.RawFormat.Equals(ImageFormat.Png))
+                return ".png";
+            if (img.RawFormat.Equals(ImageFormat.Emf))
+                return ".emf";
+            if (img.RawFormat.Equals(ImageFormat.Exif))
+                return ".exif";
+            if (img.RawFormat.Equals(ImageFormat.Gif))
+                return ".gif";
+            if (img.RawFormat.Equals(ImageFormat.Icon))
+                return ".ico";
+            if (img.RawFormat.Equals(ImageFormat.MemoryBmp))
+                return ".mbp";
+            if (img.RawFormat.Equals(ImageFormat.Tiff))
+                return ".tif";
+            else
+                return ".wmf";
+        }
+    }
+}
diff --git a/Mk0.Tools.Images/Mk0.Tools.Images.csproj b/Mk0.Tools.Images/Mk0.Tools.Images.csproj
index 388c7ce..a5e3d7f 100644
--- a/Mk0.Tools.Images/Mk0.Tools.Images.csproj
+++ b/Mk0.Tools.Images/Mk0.Tools.Images.csproj
@@ -39,6 +39,7 @@
   <ItemGroup>
     <Compile Include="BorderCropper.cs" />
     <Compile Include="GetCopyImage.cs" />
+    <Compile Include="GetImageFormat.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="ResizeImage.cs" />
     <Compile Include="Resolution.cs" />
diff --git a/Mk0.Tools.Images/ResizeImage.cs b/Mk0.Tools.Images/ResizeImage.cs
index 607c29c..1929210 100644
--- a/Mk0.Tools.Images/ResizeImage.cs
+++ b/Mk0.Tools.Images/ResizeImage.cs
@@ -9,7 +9,7 @@ using System.Drawing.Imaging;
 
 namespace Mk0.Tools.Images
 {
-    public class Resize
+    public class Resizer
     {
         public static Bitmap ResizeImage(Image image, int width, int height)
         {