diff --git a/go/oasis-node/cmd/common/json.go b/go/oasis-node/cmd/common/json.go
new file mode 100644
index 00000000000..1a07ad97996
--- /dev/null
+++ b/go/oasis-node/cmd/common/json.go
@@ -0,0 +1,15 @@
+package common
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+// PrettyJSONMarshal returns pretty-printed JSON encoding of v.
+func PrettyJSONMarshal(v interface{}) ([]byte, error) {
+	formatted, err := json.MarshalIndent(v, "", "  ")
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal to pretty JSON: %w", err)
+	}
+	return formatted, nil
+}