diff --git a/Meta/Lagom/Tools/CodeGenerators/CMakeLists.txt b/Meta/Lagom/Tools/CodeGenerators/CMakeLists.txt
index e4bacbd23c..f47a5c1612 100644
--- a/Meta/Lagom/Tools/CodeGenerators/CMakeLists.txt
+++ b/Meta/Lagom/Tools/CodeGenerators/CMakeLists.txt
@@ -1,5 +1,8 @@
 add_subdirectory(GMLCompiler)
 add_subdirectory(IPCCompiler)
+if (BUILD_LAGOM)
+    add_subdirectory(JSSpecCompiler)
+endif()
 add_subdirectory(LibEDID)
 add_subdirectory(LibGL)
 add_subdirectory(LibLocale)
diff --git a/Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/CMakeLists.txt b/Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/CMakeLists.txt
new file mode 100644
index 0000000000..5a1684f4d8
--- /dev/null
+++ b/Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/CMakeLists.txt
@@ -0,0 +1,13 @@
+set(SOURCES
+    AST/ASTPrinting.cpp
+    Parser/Lexer.cpp
+    Parser/ParseError.cpp
+    Parser/SpecParser.cpp
+    Parser/TextParser.cpp
+    Parser/XMLUtils.cpp
+    main.cpp
+)
+
+lagom_tool(JSSpecCompiler LIBS LibMain LibXML)
+target_include_directories(JSSpecCompiler PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+target_compile_options(JSSpecCompiler PRIVATE -Wno-missing-field-initializers)
diff --git a/Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/main.cpp b/Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/main.cpp
new file mode 100644
index 0000000000..276ac45784
--- /dev/null
+++ b/Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/main.cpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2023, Dan Klishch <danilklishch@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <AK/Format.h>
+#include <LibCore/File.h>
+#include <LibMain/Main.h>
+#include <LibXML/Parser/Parser.h>
+
+#include "Parser/SpecParser.h"
+
+ErrorOr<int> serenity_main(Main::Arguments)
+{
+    using namespace JSSpecCompiler;
+
+    auto input = TRY(TRY(Core::File::standard_input())->read_until_eof());
+    XML::Parser parser { StringView(input.bytes()) };
+
+    auto maybe_document = parser.parse();
+    if (maybe_document.is_error()) {
+        outln("{}", maybe_document.error());
+        return 1;
+    }
+    auto document = maybe_document.release_value();
+
+    auto maybe_function = JSSpecCompiler::Function::create(&document.root());
+    if (maybe_function.is_error()) {
+        outln("{}", maybe_function.error()->to_string());
+        return 1;
+    }
+    auto function = maybe_function.value();
+
+    out("{}", function.m_algorithm.m_tree);
+    return 0;
+}