diff --git a/CHANGELIST.md b/CHANGELIST.md
index 375de6d5..8e2f98cc 100644
--- a/CHANGELIST.md
+++ b/CHANGELIST.md
@@ -123,6 +123,7 @@
 - Add Redumper dumping command
 - Add Redumper command validation
 - Add Redumper command generation
+- Create Redumper extensions class
 
 ### 2.3 (2022-02-05)
 - Start overhauling Redump information pulling, again
diff --git a/MPF.Modules/Redumper/Converters.cs b/MPF.Modules/Redumper/Converters.cs
new file mode 100644
index 00000000..06fded40
--- /dev/null
+++ b/MPF.Modules/Redumper/Converters.cs
@@ -0,0 +1,22 @@
+using RedumpLib.Data;
+
+namespace MPF.Modules.Redumper
+{
+    public static class Converters
+    {
+        #region Cross-enumeration conversions
+
+        /// <summary>
+        /// Get the default extension for a given disc type
+        /// </summary>
+        /// <param name="type">MediaType value to check</param>
+        /// <returns>Valid extension (with leading '.'), null on error</returns>
+        public static string Extension(MediaType? type)
+        {
+            // TODO: Determine what extensions are used for each supported type
+            return ".bin";
+        }
+
+        #endregion
+    }
+}
\ No newline at end of file
diff --git a/MPF.Modules/Redumper/Parameters.cs b/MPF.Modules/Redumper/Parameters.cs
index ef1febb3..c7966624 100644
--- a/MPF.Modules/Redumper/Parameters.cs
+++ b/MPF.Modules/Redumper/Parameters.cs
@@ -615,7 +615,7 @@ namespace MPF.Modules.Redumper
         }
 
         /// <inheritdoc/>
-        public override string GetDefaultExtension(MediaType? mediaType) => ".bin"; // TODO: Fill out
+        public override string GetDefaultExtension(MediaType? mediaType) => Converters.Extension(mediaType);
 
         /// <inheritdoc/>
         public override bool IsDumpingCommand()