diff --git a/.gitignore b/.gitignore
index 6478ba29..75768e14 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,6 +20,7 @@
 # These are directories used by IDEs for storing settings
 .idea/
 .vscode/
+.cache
 
 # These are common Python virtual enviornment directory names
 venv/
diff --git a/include/pluginplay/printing/mermaid.hpp b/include/pluginplay/printing/mermaid.hpp
new file mode 100644
index 00000000..1e7578ab
--- /dev/null
+++ b/include/pluginplay/printing/mermaid.hpp
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2023 NWChemEx-Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+#include <pluginplay/module_manager/module_manager_class.hpp>
+#include <sstream>
+
+namespace pluginplay::printing {
+
+std::stringstream create_mermaid_graph(const pluginplay::ModuleManager& mm);
+
+void print_submods(const std::string module_key,
+                   const pluginplay::ModuleManager& mm, std::stringstream& ss,
+                   std::string& module_code);
+} // namespace pluginplay::printing
diff --git a/include/pluginplay/printing/printing.hpp b/include/pluginplay/printing/printing.hpp
index b35cb7fc..d571b5ec 100644
--- a/include/pluginplay/printing/printing.hpp
+++ b/include/pluginplay/printing/printing.hpp
@@ -17,3 +17,4 @@
 #pragma once
 #include <pluginplay/printing/document_module.hpp>
 #include <pluginplay/printing/document_modules.hpp>
+#include <pluginplay/printing/mermaid.hpp>
diff --git a/src/pluginplay/printing/mermaid.cpp b/src/pluginplay/printing/mermaid.cpp
new file mode 100644
index 00000000..7a1e734f
--- /dev/null
+++ b/src/pluginplay/printing/mermaid.cpp
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2024 NWChemEx-Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <pluginplay/module/module_class.hpp>
+#include <pluginplay/module_manager/module_manager_class.hpp>
+#include <sstream>
+
+namespace pluginplay::printing {
+
+void add_letter(std::string& code) {
+    if(code.size() == 0) return;
+    for(int i = (code.size() - 1); i >= 0; --i) {
+        if(code[i] == 'Z') {
+            code[i] = 'A';
+        } else {
+            code[i]++;
+            return;
+        }
+    }
+}
+
+void print_submods(const std::string module_key,
+                   const pluginplay::ModuleManager& mm, std::stringstream& ss,
+                   std::string& module_code) {
+    const auto& mm_module = mm.at(module_key); // Results in a PluginPlay Module
+    const auto& submods = mm_module.submods(); // Results in list of Submodules
+    auto main_mod_code  = module_code;
+
+    // Key is the ID/Tag, Value is the reference to the Module
+    for(const auto& [key, value] : submods) {
+        ss << "\n\t" << main_mod_code << "-->"
+           << "|" << key << "| ";
+        if(value.has_module() == false) {
+            add_letter(module_code);
+            ss << module_code << "[No Submodule associated with Key]";
+        } else {
+            add_letter(module_code);
+            ss << module_code << "[" << value.get_name() << "]";
+            print_submods(value.get_name(), mm, ss, module_code);
+        }
+    }
+}
+
+std::stringstream create_mermaid_graph(const pluginplay::ModuleManager& mm) {
+    auto n_modules = mm.size();
+    std::stringstream ss;
+    std::string module_code = "AAA";
+    if(n_modules == 0) {
+        ss << "No modules are loaded, load some modules!";
+    } else {
+        for(decltype(n_modules) i = 0; i < n_modules; i++) {
+            ss << "\n```mermaid";
+            ss << "\nflowchart LR\n";
+            auto mod = mm.keys()[i];
+            ss << "\t" << module_code << "[" << mod << "]";
+            print_submods(mod, mm, ss, module_code);
+            ss << "\n```";
+            add_letter(module_code);
+        }
+    }
+    return ss;
+}
+} // namespace pluginplay::printing
diff --git a/tests/cxx/unit_tests/pluginplay/printing/mermaid.cpp b/tests/cxx/unit_tests/pluginplay/printing/mermaid.cpp
new file mode 100644
index 00000000..439a3bd2
--- /dev/null
+++ b/tests/cxx/unit_tests/pluginplay/printing/mermaid.cpp
@@ -0,0 +1,169 @@
+/*
+ * Copyright 2024 NWChemEx-Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "../catch.hpp"
+#include "../test_common.hpp"
+#include "unit_testing_pts.hpp"
+#include <catch2/catch_test_macros.hpp>
+#include <pluginplay/module/macros.hpp>
+#include <pluginplay/module_manager/module_manager.hpp>
+#include <pluginplay/printing/mermaid.hpp>
+#include <sstream>
+#include <string>
+
+DECLARE_MODULE(OneModule);
+inline MODULE_CTOR(OneModule) { satisfies_property_type<testing::NullPT>(); }
+inline MODULE_RUN(OneModule) { return results(); }
+
+DECLARE_MODULE(TwoModule);
+inline MODULE_CTOR(TwoModule) { satisfies_property_type<testing::NullPT>(); }
+inline MODULE_RUN(TwoModule) { return results(); }
+
+DECLARE_MODULE(ThreeModule);
+inline MODULE_CTOR(ThreeModule) { satisfies_property_type<testing::NullPT>(); }
+inline MODULE_RUN(ThreeModule) { return results(); }
+
+DECLARE_MODULE(OneModuleSubTwo);
+inline MODULE_CTOR(OneModuleSubTwo) {
+    satisfies_property_type<testing::NullPT>();
+    add_submodule<testing::NullPT>("Submodule");
+}
+inline MODULE_RUN(OneModuleSubTwo) { return results(); }
+
+DECLARE_MODULE(TwoModuleSubThree);
+inline MODULE_CTOR(TwoModuleSubThree) {
+    satisfies_property_type<testing::NullPT>();
+    add_submodule<testing::NullPT>("Submodule");
+}
+inline MODULE_RUN(TwoModuleSubThree) { return results(); }
+
+DECLARE_MODULE(OneModuleSubTwoThree);
+inline MODULE_CTOR(OneModuleSubTwoThree) {
+    satisfies_property_type<testing::NullPT>();
+    add_submodule<testing::NullPT>("Submodule 1");
+    add_submodule<testing::NullPT>("Submodule 2");
+}
+inline MODULE_RUN(OneModuleSubTwoThree) { return results(); }
+
+TEST_CASE("Mermaid Graph") {
+    SECTION("No Modules") {
+        pluginplay::ModuleManager no_mods;
+        auto hello = pluginplay::printing::create_mermaid_graph(no_mods);
+        REQUIRE(hello.str() == "No modules are loaded, load some modules!");
+    }
+
+    SECTION("One Module") {
+        pluginplay::ModuleManager one_mod;
+        one_mod.add_module<OneModule>("One Module");
+        auto onemod     = pluginplay::printing::create_mermaid_graph(one_mod);
+        std::string val = "\n```mermaid\nflowchart LR\n\tAAA[One Module]\n```";
+
+        REQUIRE(val == onemod.str());
+    }
+
+    SECTION("2 Modules, Not Related") {
+        std::stringstream ss;
+        pluginplay::ModuleManager two_mods_unrelated;
+        two_mods_unrelated.add_module<OneModule>("One Module");
+        two_mods_unrelated.add_module<TwoModule>("Two Module");
+        auto twomod =
+          pluginplay::printing::create_mermaid_graph(two_mods_unrelated);
+        ss << "\n```mermaid\nflowchart LR\n\tAAA[One Module]\n```";
+        ss << "\n```mermaid\nflowchart LR\n\tAAB[Two Module]\n```";
+
+        REQUIRE(ss.str() == twomod.str());
+    }
+
+    SECTION("2 Modules, Related") {
+        std::stringstream ss2;
+        pluginplay::ModuleManager two_mods_related;
+        two_mods_related.add_module<OneModuleSubTwo>("One Module Submod Two");
+        two_mods_related.add_module<TwoModule>("Two Module");
+        two_mods_related.change_submod("One Module Submod Two", "Submodule",
+                                       "Two Module");
+        auto twomodrelated =
+          pluginplay::printing::create_mermaid_graph(two_mods_related);
+        ss2 << "\n```mermaid\nflowchart LR\n\tAAA[One Module Submod Two]\n";
+        ss2 << "\tAAA-->|Submodule| AAB[Two Module]\n```";
+        ss2 << "\n```mermaid\nflowchart LR\n\tAAC[Two Module]\n```";
+        REQUIRE(ss2.str() == twomodrelated.str());
+    }
+
+    SECTION("3 Modules, Nested") {
+        std::stringstream ss3;
+        pluginplay::ModuleManager three_mods_recursive;
+        three_mods_recursive.add_module<OneModuleSubTwo>(
+          "One Module Submod Two");
+        three_mods_recursive.add_module<TwoModuleSubThree>(
+          "Two Module Submod Three");
+        three_mods_recursive.add_module<ThreeModule>("Three Module");
+        three_mods_recursive.change_submod("One Module Submod Two", "Submodule",
+                                           "Two Module Submod Three");
+        three_mods_recursive.change_submod("Two Module Submod Three",
+                                           "Submodule", "Three Module");
+        auto threemodrecursive =
+          pluginplay::printing::create_mermaid_graph(three_mods_recursive);
+        ss3 << "\n```mermaid\n";
+        ss3 << "flowchart LR\n";
+        ss3 << "\tAAA[One Module Submod Two]\n";
+        ss3 << "\tAAA-->|Submodule| AAB[Two Module Submod Three]\n";
+        ss3 << "\tAAB-->|Submodule| AAC[Three Module]\n";
+        ss3 << "```";
+        ss3 << "\n```mermaid\n";
+        ss3 << "flowchart LR\n";
+        ss3 << "\tAAD[Three Module]\n";
+        ss3 << "```";
+        ss3 << "\n```mermaid\n";
+        ss3 << "flowchart LR\n";
+        ss3 << "\tAAE[Two Module Submod Three]\n";
+        ss3 << "\tAAE-->|Submodule| AAF[Three Module]\n";
+        ss3 << "```";
+
+        REQUIRE(ss3.str() == threemodrecursive.str());
+    }
+
+    SECTION("3 Modules, Branched") {
+        std::stringstream ss4;
+        pluginplay::ModuleManager three_mods_branched;
+        three_mods_branched.add_module<OneModuleSubTwoThree>(
+          "One Module Submod Two Three");
+        three_mods_branched.add_module<OneModule>("One Module");
+        three_mods_branched.add_module<TwoModule>("Two Module");
+        three_mods_branched.change_submod("One Module Submod Two Three",
+                                          "Submodule 1", "One Module");
+        three_mods_branched.change_submod("One Module Submod Two Three",
+                                          "Submodule 2", "Two Module");
+        auto threemodsbranched =
+          pluginplay::printing::create_mermaid_graph(three_mods_branched);
+
+        ss4 << "\n```mermaid\n";
+        ss4 << "flowchart LR\n";
+        ss4 << "\tAAA[One Module]\n";
+        ss4 << "```";
+        ss4 << "\n```mermaid\n";
+        ss4 << "flowchart LR\n";
+        ss4 << "\tAAB[One Module Submod Two Three]\n";
+        ss4 << "\tAAB-->|Submodule 1| AAC[One Module]\n";
+        ss4 << "\tAAB-->|Submodule 2| AAD[Two Module]\n";
+        ss4 << "```";
+        ss4 << "\n```mermaid\n";
+        ss4 << "flowchart LR\n";
+        ss4 << "\tAAE[Two Module]\n";
+        ss4 << "```";
+
+        REQUIRE(ss4.str() == threemodsbranched.str());
+    }
+}