diff --git a/pkg/web/webui_blob.go b/pkg/web/webui_blob.go
index 3c45469cc85ff0914228aac6064ecb6062e00bfd..89f92d3127f257e1714acb267ed5db416fbe8b16 100644
--- a/pkg/web/webui_blob.go
+++ b/pkg/web/webui_blob.go
@@ -3,6 +3,7 @@ package web
 import (
 	"bytes"
 	"html/template"
+	"mime"
 	"net/http"
 	"path/filepath"
 	"strings"
@@ -166,8 +167,16 @@ func repoBlobRaw(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
-	w.Write(content)
+	contentType := mime.TypeByExtension(filepath.Ext(path))
+	if contentType == "" {
+		contentType = http.DetectContentType(content)
+	}
+	if strings.HasPrefix(contentType, "text/") && !strings.Contains(contentType, "charset") {
+		contentType += "; charset=utf-8"
+	}
+
+	w.Header().Set("Content-Type", contentType)
+	_, _ = w.Write(content)
 }
 
 // isBinaryContent detects if file content is binary using a simple heuristic.