diff --git a/CutToLength/MainForm.cs b/CutToLength/MainForm.cs
index 94de19f..56dc7c1 100644
--- a/CutToLength/MainForm.cs
+++ b/CutToLength/MainForm.cs
@@ -242,7 +242,7 @@ namespace CutToLength
 
         private void SaveTools(IEnumerable<Tool> tools)
         {
-            var json = JsonConvert.SerializeObject(tools);
+            var json = JsonConvert.SerializeObject(tools, Formatting.Indented);
             File.WriteAllText(ToolsFilePath, json);
         }