diff --git a/jsroot/types/string/read.mjs b/jsroot/types/string/read.mjs
new file mode 100644
index 0000000..f68df06
--- /dev/null
+++ b/jsroot/types/string/read.mjs
@@ -0,0 +1,13 @@
+import { read } from "../../jsroot_reader.mjs";
+
+function getUtf8decoding(s) {
+  const bytes = Uint8Array.from(s, (c) => c.charCodeAt(0));
+  return new TextDecoder("utf-8").decode(bytes);
+}
+
+const fields = ["Index32", "Index64", "SplitIndex32", "SplitIndex64"];
+
+const [input = "types.string.root", output = "types.string.json"] =
+  process.argv.slice(2);
+
+read(input, output, fields, getUtf8decoding);
diff --git a/jsroot/types/variant/read.mjs b/jsroot/types/variant/read.mjs
new file mode 100644
index 0000000..d659129
--- /dev/null
+++ b/jsroot/types/variant/read.mjs
@@ -0,0 +1,8 @@
+import { read } from "../../jsroot_reader.mjs";
+
+const fields = ["f", "Vector"];
+
+const [input = "types.variant.root", output = "types.variant.json"] =
+  process.argv.slice(2);
+
+read(input, output, fields);
diff --git a/jsroot/types/vector/README.md b/jsroot/types/vector/README.md
new file mode 100644
index 0000000..cddafec
--- /dev/null
+++ b/jsroot/types/vector/README.md
@@ -0,0 +1,4 @@
+# `std::vector`
+
+ * [`fundamental`](fundamental): `std::vector<std::int32_t>`
+ * [`nested`](nested): `std::vector<std::vector<std::int32_t>>`
diff --git a/jsroot/types/vector/fundamental/read.mjs b/jsroot/types/vector/fundamental/read.mjs
new file mode 100644
index 0000000..8b1b27c
--- /dev/null
+++ b/jsroot/types/vector/fundamental/read.mjs
@@ -0,0 +1,10 @@
+import { read } from "../../../jsroot_reader.mjs";
+
+const fields = ["Index32", "Index64", "SplitIndex32", "SplitIndex64"];
+
+const [
+  input = "types.vector.fundamental.root",
+  output = "types.vector.fundamental.json",
+] = process.argv.slice(2);
+
+read(input, output, fields);
diff --git a/jsroot/types/vector/nested/read.mjs b/jsroot/types/vector/nested/read.mjs
new file mode 100644
index 0000000..2658ddc
--- /dev/null
+++ b/jsroot/types/vector/nested/read.mjs
@@ -0,0 +1,10 @@
+import { read } from "../../../jsroot_reader.mjs";
+
+const fields = ["Index32", "Index64", "SplitIndex32", "SplitIndex64"];
+
+const [
+  input = "types.vector.nested.root",
+  output = "types.vector.nested.json",
+] = process.argv.slice(2);
+
+read(input, output, fields);