diff --git a/src/pages/tools/csv/csv-rows-to-columns/service.ts b/src/pages/tools/csv/csv-rows-to-columns/service.ts
index 93399ee..4a7dba7 100644
--- a/src/pages/tools/csv/csv-rows-to-columns/service.ts
+++ b/src/pages/tools/csv/csv-rows-to-columns/service.ts
@@ -17,12 +17,18 @@ export function csvRowsToColumns(
   customFiller: string,
   commentCharacter: string
 ): string {
+  if (!input) {
+    return '';
+  }
+
   const rows = input
-    .split('\n')
-    .map((row) => row.split(','))
-    .filter(
-      (row) => row.length > 0 && !row[0].trim().startsWith(commentCharacter)
-    );
+    ? input
+        .split('\n')
+        .map((row) => row.split(','))
+        .filter(
+          (row) => row.length > 0 && !row[0].trim().startsWith(commentCharacter)
+        )
+    : [];
   const columnCount = Math.max(...rows.map((row) => row.length));
   for (let i = 0; i < rows.length; i++) {
     for (let j = 0; j < columnCount; j++) {