diff --git a/internal/controller/handler/convert.go b/internal/controller/handler/convert.go
index 3a90695..b832d6b 100644
--- a/internal/controller/handler/convert.go
+++ b/internal/controller/handler/convert.go
@@ -8,6 +8,7 @@ import (
 	"strconv"
 
 	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
 	"github.com/xuri/excelize/v2"
 	"gitstore.ru/tolikproh/sirius/internal/model"
 )
@@ -19,13 +20,16 @@ var (
 )
 
 func (s *Handler) GinConvert(c *gin.Context) {
-	s.log.Debug("start convert")
+	sessionId := uuid.New().String()
+
+	s.log.Printf("start convert. session id: %s; user agent: %s; remote addr: %s; file size [byte]: %d",
+		sessionId, c.Request.UserAgent(), c.Request.RemoteAddr, c.Request.ContentLength)
 
 	c.Request.Body = http.MaxBytesReader(c.Writer, c.Request.Body, s.cfg.Srv.MaxSizeFile<<20)
 
 	file, fileHeader, err := c.Request.FormFile("file")
 	if err != nil {
-		s.log.Errorf("error code: 001. %s", err.Error())
+		s.log.Errorf("session id: %s. error code: 001. %s", sessionId, err.Error())
 		c.JSON(http.StatusBadRequest, gin.H{
 			"error": err.Error(),
 		})
@@ -42,7 +46,7 @@ func (s *Handler) GinConvert(c *gin.Context) {
 
 	// Validate File Type
 	if _, ex := TEXT_TYPES[fileType]; !ex {
-		s.log.Errorf("error code: 002. formated data not text/plain")
+		s.log.Errorf("session id: %s. error code: 002. formated data not text/plain", sessionId)
 		c.JSON(http.StatusBadRequest, gin.H{
 			"error": errors.New("formated data not text/plain").Error(),
 		})
@@ -50,7 +54,7 @@ func (s *Handler) GinConvert(c *gin.Context) {
 	}
 
 	if !json.Valid(buffer) {
-		s.log.Errorf("error code: 003. formated data not json")
+		s.log.Errorf("session id: %s. error code: 003. formated data not json", sessionId)
 		c.JSON(http.StatusBadRequest, gin.H{
 			"error": errors.New("formated data not json").Error(),
 		})
@@ -61,7 +65,7 @@ func (s *Handler) GinConvert(c *gin.Context) {
 
 	err = json.Unmarshal(buffer, &sirius)
 	if err != nil {
-		s.log.Errorf("error code: 004. %s", err.Error())
+		s.log.Errorf("session id: %s. error code: 004. %s", sessionId, err.Error())
 		c.JSON(http.StatusBadRequest, gin.H{
 			"error": errors.New("Error unmarshal file").Error(),
 		})
@@ -70,7 +74,7 @@ func (s *Handler) GinConvert(c *gin.Context) {
 
 	buff, err := SaveToExel(sirius.NewBolid().ZoneInfo())
 	if err != nil {
-		s.log.Errorf("error code: 005. %s", err.Error())
+		s.log.Errorf("session id: %s. error code: 005. %s", sessionId, err.Error())
 		c.JSON(http.StatusBadRequest, gin.H{
 			"error": errors.New("Error create file").Error(),
 		})
@@ -79,7 +83,7 @@ func (s *Handler) GinConvert(c *gin.Context) {
 
 	c.Data(200, "application/vnd.ms-excel", buff.Bytes())
 
-	s.log.Printf("converted: ok. filename: %s; file size: %d bytes", fileHeader.Filename, fileHeader.Size)
+	s.log.Printf("session id: %s.converted: ok. filename: %s; file size: %d bytes", sessionId, fileHeader.Filename, fileHeader.Size)
 
 }