diff --git a/src/Umbraco.Web.UI.Client/.prettierignore b/src/Umbraco.Web.UI.Client/.prettierignore
new file mode 100644
index 0000000000..7cbc4e5600
--- /dev/null
+++ b/src/Umbraco.Web.UI.Client/.prettierignore
@@ -0,0 +1,2 @@
+# Ignore auto-generated backend-api files
+src/external/backend-api/src