diff --git a/Userland/Utilities/base64.cpp b/Userland/Utilities/base64.cpp
index 4d21b88199..dbcd0a1221 100644
--- a/Userland/Utilities/base64.cpp
+++ b/Userland/Utilities/base64.cpp
@@ -6,7 +6,7 @@
 
 #include <AK/Base64.h>
 #include <LibCore/ArgsParser.h>
-#include <LibCore/File.h>
+#include <LibCore/Stream.h>
 #include <LibCore/System.h>
 #include <LibMain/Main.h>
 
@@ -22,19 +22,14 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
     args_parser.add_positional_argument(filepath, "", "file", Core::ArgsParser::Required::No);
     args_parser.parse(arguments);
 
-    ByteBuffer buffer;
-    if (filepath == nullptr || filepath == "-") {
-        buffer = Core::File::standard_input()->read_all();
-    } else {
-        auto file = TRY(Core::File::open(filepath, Core::OpenMode::ReadOnly));
-        buffer = file->read_all();
-    }
+    auto file = TRY(Core::Stream::File::open_file_or_standard_stream(filepath, Core::Stream::OpenMode::Read));
+    ByteBuffer buffer = TRY(file->read_all());
 
     TRY(Core::System::pledge("stdio"));
 
     if (decode) {
-        auto decoded = TRY(decode_base64(StringView(buffer)));
-        Core::File::standard_output()->write(decoded.data(), decoded.size());
+        auto decoded = TRY(decode_base64(buffer));
+        out("{}", StringView(decoded.bytes()));
         return 0;
     }