diff --git a/tui2/pages/output/render.go b/tui2/pages/output/render.go
index 1ccd0aa1..8b9948bf 100644
--- a/tui2/pages/output/render.go
+++ b/tui2/pages/output/render.go
@@ -166,6 +166,9 @@ func (o *Output) decodeDynamicMessage(msgDesc *manifest.ModuleDescriptor, anyin
 }
 
 func highlightJSON(in string) string {
+	if len(in) > 1_000_000 {
+		return in
+	}
 	out := &strings.Builder{}
 	profile := "friendly"
 	if lipgloss.HasDarkBackground() {