diff --git a/ImageNodes/Images/ImageBaseNode.cs b/ImageNodes/Images/ImageBaseNode.cs
index c816a759..9f79de40 100644
--- a/ImageNodes/Images/ImageBaseNode.cs
+++ b/ImageNodes/Images/ImageBaseNode.cs
@@ -154,6 +154,46 @@ public abstract class ImageBaseNode:Node
             case ImageType.Heic:
                 args.SetMimeType("image/heic");
                 break;
+            default:
+            {
+                switch (imageInfo.Format?.ToLowerInvariant())
+                {
+                    case "bmp":
+                        args.SetMimeType("image/bmp");
+                        break;
+                    case "jpeg":
+                    case "jpg":
+                    case "jpe":
+                        args.SetMimeType("image/jpeg");
+                        break;
+                    case "png":
+                        args.SetMimeType("image/png");
+                        break;
+                    case "gif":
+                        args.SetMimeType("image/gif");
+                        break;
+                    case "tiff":
+                        args.SetMimeType("image/tiff");
+                        break;
+                    case "webp":
+                        args.SetMimeType("image/webp");
+                        break;
+                    case "pbm":
+                        args.SetMimeType("image/pbm");
+                        break;
+                    case "tga":
+                        args.SetMimeType("image/tga");
+                        break;
+                    case "heic":
+                        args.SetMimeType("image/heic");
+                        break;
+                    default:
+                        if(string.IsNullOrWhiteSpace(imageInfo.Format) == false)
+                            args.SetMimeType("image/" + imageInfo.Format.ToLowerInvariant());
+                        break;
+                }
+                break;
+            }
         }
         
         args.SetMetadata(metadata);