diff --git a/src/main/java/com/ffii/fpsms/modules/report/service/ReportService.kt b/src/main/java/com/ffii/fpsms/modules/report/service/ReportService.kt
index bbce6b3..7bcfcb7 100644
--- a/src/main/java/com/ffii/fpsms/modules/report/service/ReportService.kt
+++ b/src/main/java/com/ffii/fpsms/modules/report/service/ReportService.kt
@@ -3,8 +3,12 @@ package com.ffii.fpsms.modules.report.service
 import org.springframework.stereotype.Service
 import net.sf.jasperreports.engine.*
 import net.sf.jasperreports.engine.data.JRMapCollectionDataSource
+import java.io.ByteArrayOutputStream
 import java.io.InputStream
 import com.ffii.core.support.JdbcDao
+import net.sf.jasperreports.engine.export.ooxml.JRXlsxExporter
+import net.sf.jasperreports.export.SimpleExporterInput
+import net.sf.jasperreports.export.SimpleOutputStreamExporterOutput
 
 @Service
 open class ReportService(
@@ -926,6 +930,23 @@ fun searchMaterialStockOutTraceabilityReport(
         }
         return jdbcDao.queryForList("$finalSql ORDER BY itemNo, lotNo", args)
     }
+    /**
+     * Compiles and fills a Jasper Report, then exports to Excel (.xlsx). Same layout/columns as the report template.
+     */
+    fun createExcelResponse(templatePath: String, params: Map<String, Any>, dataList: List<Map<String, Any>>): ByteArray {
+        val stream = this::class.java.getResourceAsStream(templatePath)
+            ?: throw RuntimeException("Report template not found: $templatePath")
+        val jasperReport = JasperCompileManager.compileReport(stream)
+        val dataSource = JRMapCollectionDataSource(dataList)
+        val jasperPrint = JasperFillManager.fillReport(jasperReport, params, dataSource)
+        val out = ByteArrayOutputStream()
+        val exporter = JRXlsxExporter()
+        exporter.setExporterInput(SimpleExporterInput(jasperPrint))
+        exporter.setExporterOutput(SimpleOutputStreamExporterOutput(out))
+        exporter.exportReport()
+        return out.toByteArray()
+    }
+
     /**
      * Compiles and fills a Jasper Report, returning the PDF as a ByteArray.
      */
diff --git a/src/main/java/com/ffii/fpsms/modules/report/web/ReportController.kt b/src/main/java/com/ffii/fpsms/modules/report/web/ReportController.kt
index 87b2631..710fdac 100644
--- a/src/main/java/com/ffii/fpsms/modules/report/web/ReportController.kt
+++ b/src/main/java/com/ffii/fpsms/modules/report/web/ReportController.kt
@@ -269,8 +269,6 @@ class ReportController(
         @RequestParam(required = false) lastOutDateEnd: String?
     ): ResponseEntity<ByteArray> {
         val parameters = mutableMapOf<String, Any>()
-        
-        // Set report header parameters
         parameters["stockCategory"] = stockCategory ?: "All"
         parameters["itemNo"] = itemCode ?: "All"
         parameters["reportDate"] = LocalDate.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd"))
@@ -282,7 +280,7 @@ class ReportController(
         parameters["lastInDateEnd"] = lastInDateEnd ?: ""
         parameters["lastOutDateStart"] = lastOutDateStart ?: ""
         parameters["lastOutDateEnd"] = lastOutDateEnd ?: ""
-    
+
         val dbData = reportService.searchStockBalanceReport(
             stockCategory,
             itemCode,
@@ -294,20 +292,20 @@ class ReportController(
             lastOutDateStart,
             lastOutDateEnd
         )
-    
-        val pdfBytes = reportService.createPdfResponse(
-            "/jasper/StockBalanceReport.jrxml", 
-            parameters, 
+
+        val excelBytes = reportService.createExcelResponse(
+            "/jasper/StockBalanceReport.jrxml",
+            parameters,
             dbData
         )
-    
+
         val headers = HttpHeaders().apply {
-            contentType = MediaType.APPLICATION_PDF
-            setContentDispositionFormData("attachment", "StockBalanceReport.pdf")
-            set("filename", "StockBalanceReport.pdf") 
+            contentType = MediaType.parseMediaType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
+            setContentDispositionFormData("attachment", "StockBalanceReport.xlsx")
+            set("filename", "StockBalanceReport.xlsx")
         }
-    
-        return ResponseEntity(pdfBytes, headers, HttpStatus.OK)
+
+        return ResponseEntity(excelBytes, headers, HttpStatus.OK)
     }
 
 }
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