diff --git a/SurveyLib.Core/Tools/IDataExporter.cs b/SurveyLib.Core/Tools/IDataExporter.cs
new file mode 100644
index 0000000..9de4e30
--- /dev/null
+++ b/SurveyLib.Core/Tools/IDataExporter.cs
@@ -0,0 +1,6 @@
+namespace SurveyLib.Core.Tools;
+
+public interface IDataExporter
+{
+    Task<byte[]> ExportDataBySurveyIdAsync(int surveyId);
+}
\ No newline at end of file