diff --git a/src/class_diagram/generators/mermaid/class_diagram_generator.cc b/src/class_diagram/generators/mermaid/class_diagram_generator.cc
index 64fc15aa6..5e92a9751 100644
--- a/src/class_diagram/generators/mermaid/class_diagram_generator.cc
+++ b/src/class_diagram/generators/mermaid/class_diagram_generator.cc
@@ -25,6 +25,7 @@
 namespace clanguml::class_diagram::generators::mermaid {
 
 using clanguml::common::generators::mermaid::indent;
+using clanguml::common::generators::mermaid::render_name;
 
 generator::generator(diagram_config &config, diagram_model &model)
     : common_generator<diagram_config, diagram_model>{config, model}
@@ -32,19 +33,6 @@ generator::generator(diagram_config &config, diagram_model &model)
 {
 }
 
-std::string generator::render_name(std::string name) const
-{
-    util::replace_all(name, "<", "&lt;");
-    util::replace_all(name, ">", "&gt;");
-    util::replace_all(name, "(", "&lpar;");
-    util::replace_all(name, ")", "&rpar;");
-    util::replace_all(name, "##", "::");
-    util::replace_all(name, "{", "&lbrace;");
-    util::replace_all(name, "}", "&rbrace;");
-
-    return name;
-}
-
 void generator::generate_alias(
     const common::model::element &c, std::ostream &ostr) const
 {
diff --git a/src/class_diagram/generators/mermaid/class_diagram_generator.h b/src/class_diagram/generators/mermaid/class_diagram_generator.h
index 5da861a7a..4a8bd1183 100644
--- a/src/class_diagram/generators/mermaid/class_diagram_generator.h
+++ b/src/class_diagram/generators/mermaid/class_diagram_generator.h
@@ -246,8 +246,6 @@ class generator : public common_generator<diagram_config, diagram_model> {
     const std::vector<std::string> method_groups_{
         "constructors", "assignment", "operators", "other"};
 
-    std::string render_name(std::string name) const;
-
     template <typename T>
     void sort_class_elements(std::vector<T> &elements) const
     {
diff --git a/src/common/generators/generators.h b/src/common/generators/generators.h
index 639a5fe6d..8c3d29d13 100644
--- a/src/common/generators/generators.h
+++ b/src/common/generators/generators.h
@@ -31,6 +31,7 @@
 #include "package_diagram/generators/json/package_diagram_generator.h"
 #include "package_diagram/generators/plantuml/package_diagram_generator.h"
 #include "sequence_diagram/generators/json/sequence_diagram_generator.h"
+#include "sequence_diagram/generators/mermaid/sequence_diagram_generator.h"
 #include "sequence_diagram/generators/plantuml/sequence_diagram_generator.h"
 #include "util/util.h"
 #include "version.h"
@@ -168,11 +169,11 @@ struct diagram_generator_t<clanguml::config::class_diagram,
     mermaid_generator_tag> {
     using type = clanguml::class_diagram::generators::mermaid::generator;
 };
-// template <>
-// struct diagram_generator_t<clanguml::config::sequence_diagram,
-//     mermaid_generator_tag> {
-//     using type = clanguml::sequence_diagram::generators::mermaid::generator;
-// };
+template <>
+struct diagram_generator_t<clanguml::config::sequence_diagram,
+    mermaid_generator_tag> {
+    using type = clanguml::sequence_diagram::generators::mermaid::generator;
+};
 // template <>
 // struct diagram_generator_t<clanguml::config::package_diagram,
 //     mermaid_generator_tag> {
diff --git a/src/common/generators/mermaid/generator.cc b/src/common/generators/mermaid/generator.cc
index 740ac3cb6..9000cedd4 100644
--- a/src/common/generators/mermaid/generator.cc
+++ b/src/common/generators/mermaid/generator.cc
@@ -64,9 +64,9 @@ std::string to_mermaid(message_t r)
 {
     switch (r) {
     case message_t::kCall:
-        return "->";
+        return "->>";
     case message_t::kReturn:
-        return "-->";
+        return "-->>";
     default:
         return "";
     }
@@ -78,4 +78,16 @@ std::string indent(const unsigned level)
     return std::string(level * kIndentWidth, ' ');
 }
 
+std::string render_name(std::string name)
+{
+    util::replace_all(name, "<", "&lt;");
+    util::replace_all(name, ">", "&gt;");
+    util::replace_all(name, "(", "&lpar;");
+    util::replace_all(name, ")", "&rpar;");
+    util::replace_all(name, "##", "::");
+    util::replace_all(name, "{", "&lbrace;");
+    util::replace_all(name, "}", "&rbrace;");
+
+    return name;
+}
 } // namespace clanguml::common::generators::mermaid
diff --git a/src/common/generators/mermaid/generator.h b/src/common/generators/mermaid/generator.h
index 7eee83c26..bff4bfedc 100644
--- a/src/common/generators/mermaid/generator.h
+++ b/src/common/generators/mermaid/generator.h
@@ -44,6 +44,8 @@ std::string to_mermaid(message_t r);
 
 std::string indent(const unsigned level);
 
+std::string render_name(std::string name);
+
 /**
  * @brief Base class for diagram generators
  *
diff --git a/src/sequence_diagram/generators/mermaid/sequence_diagram_generator.cc b/src/sequence_diagram/generators/mermaid/sequence_diagram_generator.cc
new file mode 100644
index 000000000..de9e33083
--- /dev/null
+++ b/src/sequence_diagram/generators/mermaid/sequence_diagram_generator.cc
@@ -0,0 +1,580 @@
+/**
+ * @file src/sequence_diagram/generators/mermaid/sequence_diagram_generator.cc
+ *
+ * Copyright (c) 2021-2023 Bartek Kryza <bkryza@gmail.com>
+ *
+ * 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 "sequence_diagram_generator.h"
+
+namespace clanguml::sequence_diagram::generators::mermaid {
+
+using clanguml::common::model::message_t;
+using clanguml::config::location_t;
+using clanguml::sequence_diagram::model::activity;
+using clanguml::sequence_diagram::model::message;
+using namespace clanguml::util;
+
+using clanguml::common::generators::mermaid::indent;
+using clanguml::common::generators::mermaid::render_name;
+
+std::string render_participant_name(std::string name)
+{
+    util::replace_all(name, "##", "::");
+
+    return name;
+}
+
+std::string render_message_text(std::string text)
+{
+    util::replace_all(text, ";", "#59;");
+
+    return text;
+}
+
+generator::generator(
+    clanguml::config::sequence_diagram &config, diagram_model &model)
+    : common_generator<diagram_config, diagram_model>{config, model}
+{
+}
+
+void generator::generate_call(const message &m, std::ostream &ostr) const
+{
+    const auto &from = model().get_participant<model::participant>(m.from());
+    const auto &to = model().get_participant<model::participant>(m.to());
+
+    if (!from || !to) {
+        LOG_DBG("Skipping empty call from '{}' to '{}'", m.from(), m.to());
+        return;
+    }
+
+    generate_participant(ostr, m.from());
+    generate_participant(ostr, m.to());
+
+    std::string message;
+
+    model::function::message_render_mode render_mode =
+        select_method_arguments_render_mode();
+
+    if (to.value().type_name() == "method") {
+        const auto &f = dynamic_cast<const model::method &>(to.value());
+        const std::string_view style = f.is_static() ? "" : "";
+        message =
+            fmt::format("{}{}{}", style, f.message_name(render_mode), style);
+    }
+    else if (config().combine_free_functions_into_file_participants()) {
+        if (to.value().type_name() == "function") {
+            message = dynamic_cast<const model::function &>(to.value())
+                          .message_name(render_mode);
+        }
+        else if (to.value().type_name() == "function_template") {
+            message = dynamic_cast<const model::function_template &>(to.value())
+                          .message_name(render_mode);
+        }
+    }
+
+    const std::string from_alias = generate_alias(from.value());
+    const std::string to_alias = generate_alias(to.value());
+
+    print_debug(m, ostr);
+
+    ostr << indent(1) << from_alias << " "
+         << common::generators::mermaid::to_mermaid(message_t::kCall) << " ";
+
+    ostr << indent(1) << to_alias;
+
+    ostr << " : ";
+
+    if (m.message_scope() == common::model::message_scope_t::kCondition)
+        ostr << "[";
+
+    ostr << message;
+
+    if (m.message_scope() == common::model::message_scope_t::kCondition)
+        ostr << "]";
+
+    ostr << '\n';
+
+    LOG_DBG("Generated call '{}' from {} [{}] to {} [{}]", message, from,
+        m.from(), to, m.to());
+}
+
+void generator::generate_return(const message &m, std::ostream &ostr) const
+{
+    // Add return activity only for messages between different actors and
+    // only if the return type is different than void
+    const auto &from = model().get_participant<model::participant>(m.from());
+    const auto &to = model().get_participant<model::function>(m.to());
+    if ((m.from() != m.to()) && !to.value().is_void()) {
+        const std::string from_alias = generate_alias(from.value());
+
+        const std::string to_alias = generate_alias(to.value());
+
+        ostr << indent(1) << to_alias << " "
+             << common::generators::mermaid::to_mermaid(message_t::kReturn)
+             << " " << from_alias << " : ";
+
+        if (config().generate_return_types()) {
+            ostr << m.return_type();
+        }
+
+        ostr << '\n';
+    }
+}
+
+void generator::generate_activity(const activity &a, std::ostream &ostr,
+    std::vector<common::model::diagram_element::id_t> &visited) const
+{
+    for (const auto &m : a.messages()) {
+        if (m.type() == message_t::kCall) {
+            const auto &to =
+                model().get_participant<model::participant>(m.to());
+
+            visited.push_back(m.from());
+
+            LOG_DBG("Generating message [{}] --> [{}]", m.from(), m.to());
+
+            generate_call(m, ostr);
+
+            std::string to_alias = generate_alias(to.value());
+
+            ostr << indent(1) << "activate " << to_alias << std::endl;
+
+            if (model().sequences().find(m.to()) != model().sequences().end()) {
+                if (std::find(visited.begin(), visited.end(), m.to()) ==
+                    visited
+                        .end()) { // break infinite recursion on recursive calls
+                    LOG_DBG("Creating activity {} --> {} - missing sequence {}",
+                        m.from(), m.to(), m.to());
+                    generate_activity(
+                        model().get_activity(m.to()), ostr, visited);
+                }
+            }
+            else
+                LOG_DBG("Skipping activity {} --> {} - missing sequence {}",
+                    m.from(), m.to(), m.to());
+
+            generate_return(m, ostr);
+
+            ostr << indent(1) << "deactivate " << to_alias << std::endl;
+
+            visited.pop_back();
+        }
+        else if (m.type() == message_t::kIf) {
+            print_debug(m, ostr);
+            ostr << indent(1) << "alt";
+            if (const auto &text = m.condition_text(); text.has_value())
+                ostr << " " << render_message_text(text.value());
+            ostr << '\n';
+        }
+        else if (m.type() == message_t::kElseIf) {
+            print_debug(m, ostr);
+            ostr << indent(1) << "else";
+            if (const auto &text = m.condition_text(); text.has_value())
+                ostr << " " << render_message_text(text.value());
+            ostr << '\n';
+        }
+        else if (m.type() == message_t::kElse) {
+            print_debug(m, ostr);
+            ostr << indent(1) << "else\n";
+        }
+        else if (m.type() == message_t::kIfEnd) {
+            ostr << indent(1) << "end\n";
+        }
+        else if (m.type() == message_t::kWhile) {
+            print_debug(m, ostr);
+            ostr << indent(1) << "loop";
+            if (const auto &text = m.condition_text(); text.has_value())
+                ostr << " " << render_message_text(text.value());
+            ostr << '\n';
+        }
+        else if (m.type() == message_t::kWhileEnd) {
+            ostr << indent(1) << "end\n";
+        }
+        else if (m.type() == message_t::kFor) {
+            print_debug(m, ostr);
+            ostr << indent(1) << "loop";
+            if (const auto &text = m.condition_text(); text.has_value())
+                ostr << " " << render_message_text(text.value());
+            ostr << '\n';
+        }
+        else if (m.type() == message_t::kForEnd) {
+            ostr << "end\n";
+        }
+        else if (m.type() == message_t::kDo) {
+            print_debug(m, ostr);
+            ostr << indent(1) << "loop";
+            if (const auto &text = m.condition_text(); text.has_value())
+                ostr << " " << render_message_text(text.value());
+            ostr << '\n';
+        }
+        else if (m.type() == message_t::kDoEnd) {
+            ostr << indent(1) << "end\n";
+        }
+        else if (m.type() == message_t::kTry) {
+            print_debug(m, ostr);
+            ostr << indent(1) << "critical\n";
+        }
+        else if (m.type() == message_t::kCatch) {
+            print_debug(m, ostr);
+            ostr << indent(1) << "option "
+                 << render_message_text(m.message_name()) << '\n';
+        }
+        else if (m.type() == message_t::kTryEnd) {
+            print_debug(m, ostr);
+            ostr << indent(1) << "end\n";
+        }
+        else if (m.type() == message_t::kSwitch) {
+            print_debug(m, ostr);
+            ostr << indent(1) << "alt\n";
+        }
+        else if (m.type() == message_t::kCase) {
+            print_debug(m, ostr);
+            ostr << indent(1) << "else "
+                 << render_message_text(m.message_name()) << '\n';
+        }
+        else if (m.type() == message_t::kSwitchEnd) {
+            ostr << indent(1) << "end\n";
+        }
+        else if (m.type() == message_t::kConditional) {
+            print_debug(m, ostr);
+            ostr << indent(1) << "alt";
+            if (const auto &text = m.condition_text(); text.has_value())
+                ostr << " " << render_message_text(text.value());
+            ostr << '\n';
+        }
+        else if (m.type() == message_t::kConditionalElse) {
+            print_debug(m, ostr);
+            ostr << indent(1) << "else\n";
+        }
+        else if (m.type() == message_t::kConditionalEnd) {
+            ostr << indent(1) << "end\n";
+        }
+    }
+}
+
+void generator::generate_participant(
+    std::ostream &ostr, const std::string &name) const
+{
+    auto p = model().get(name);
+
+    if (!p.has_value()) {
+        LOG_WARN("Cannot find participant {} from `participants_order` option",
+            name);
+        return;
+    }
+
+    generate_participant(ostr, p.value().id(), true);
+}
+
+void generator::generate_participant(
+    std::ostream &ostr, common::id_t id, bool force) const
+{
+    common::id_t participant_id{0};
+
+    if (!force) {
+        for (const auto pid : model().active_participants()) {
+            if (pid == id) {
+                participant_id = pid;
+                break;
+            }
+        }
+    }
+    else
+        participant_id = id;
+
+    if (participant_id == 0)
+        return;
+
+    if (is_participant_generated(participant_id))
+        return;
+
+    const auto &participant =
+        model().get_participant<model::participant>(participant_id).value();
+
+    if (participant.type_name() == "method") {
+        const auto class_id =
+            model()
+                .get_participant<model::method>(participant_id)
+                .value()
+                .class_id();
+
+        if (is_participant_generated(class_id))
+            return;
+
+        const auto &class_participant =
+            model().get_participant<model::participant>(class_id).value();
+
+        print_debug(class_participant, ostr);
+
+        ostr << indent(1) << "participant " << class_participant.alias()
+             << " as "
+             << render_participant_name(config().using_namespace().relative(
+                    class_participant.full_name(false)));
+
+        ostr << '\n';
+
+        generated_participants_.emplace(class_id);
+    }
+    else if ((participant.type_name() == "function" ||
+                 participant.type_name() == "function_template") &&
+        config().combine_free_functions_into_file_participants()) {
+        // Create a single participant for all functions declared in a
+        // single file
+        const auto &file_path =
+            model()
+                .get_participant<model::function>(participant_id)
+                .value()
+                .file();
+
+        assert(!file_path.empty());
+
+        const auto file_id = common::to_id(file_path);
+
+        if (is_participant_generated(file_id))
+            return;
+
+        auto participant_name = util::path_to_url(std::filesystem::relative(
+            std::filesystem::path{file_path}, config().root_directory())
+                                                      .string());
+
+        ostr << indent(1) << "participant " << fmt::format("C_{:022}", file_id)
+             << " as " << render_participant_name(participant_name);
+        ostr << '\n';
+
+        generated_participants_.emplace(file_id);
+    }
+    else {
+        print_debug(participant, ostr);
+
+        ostr << indent(1) << "participant " << participant.alias() << " as "
+             << config().using_namespace().relative(
+                    participant.full_name(false));
+        ostr << '\n';
+
+        generated_participants_.emplace(participant_id);
+    }
+}
+
+bool generator::is_participant_generated(common::id_t id) const
+{
+    return std::find(generated_participants_.begin(),
+               generated_participants_.end(),
+               id) != generated_participants_.end();
+}
+
+std::string generator::generate_alias(
+    const model::participant &participant) const
+{
+    if ((participant.type_name() == "function" ||
+            participant.type_name() == "function_template") &&
+        config().combine_free_functions_into_file_participants()) {
+        const auto file_id = common::to_id(participant.file());
+
+        return fmt::format("C_{:022}", file_id);
+    }
+
+    return participant.alias();
+}
+
+void generator::generate_diagram(std::ostream &ostr) const
+{
+    model().print();
+
+    ostr << "sequenceDiagram\n";
+
+    if (config().participants_order.has_value) {
+        for (const auto &p : config().participants_order()) {
+            LOG_DBG("Pregenerating participant {}", p);
+            generate_participant(ostr, p);
+        }
+    }
+
+    bool star_participant_generated{false};
+
+    for (const auto &ft : config().from_to()) {
+        // First, find the sequence of activities from 'from' location
+        // to 'to' location
+        assert(ft.size() == 2);
+
+        const auto &from_location = ft.front();
+        const auto &to_location = ft.back();
+
+        auto from_activity_id = model().get_from_activity_id(from_location);
+        auto to_activity_id = model().get_to_activity_id(to_location);
+
+        if (from_activity_id == 0 || to_activity_id == 0)
+            continue;
+
+        auto message_chains_unique = model().get_all_from_to_message_chains(
+            from_activity_id, to_activity_id);
+
+        for (const auto &mc : message_chains_unique) {
+            const auto &from =
+                model().get_participant<model::function>(from_activity_id);
+
+            if (from.value().type_name() == "method" ||
+                config().combine_free_functions_into_file_participants()) {
+                if (!star_participant_generated) {
+                    ostr << indent(1) << "participant *\n";
+                    star_participant_generated = true;
+                }
+                generate_participant(ostr, from_activity_id);
+                ostr << indent(1) << "* "
+                     << common::generators::mermaid::to_mermaid(
+                            message_t::kCall)
+                     << " " << generate_alias(from.value()) << " : "
+                     << from.value().message_name(
+                            select_method_arguments_render_mode())
+                     << std::endl;
+            }
+
+            for (const auto &m : mc) {
+                generate_call(m, ostr);
+            }
+        }
+    }
+
+    for (const auto &to_location : config().to()) {
+        auto to_activity_id = model().get_to_activity_id(to_location);
+
+        if (to_activity_id == 0)
+            continue;
+
+        auto message_chains_unique =
+            model().get_all_from_to_message_chains(0, to_activity_id);
+
+        for (const auto &mc : message_chains_unique) {
+            const auto from_activity_id = mc.front().from();
+
+            const auto &from =
+                model().get_participant<model::function>(from_activity_id);
+
+            if (from.value().type_name() == "method" ||
+                config().combine_free_functions_into_file_participants()) {
+                generate_participant(ostr, from_activity_id);
+                ostr << indent(1) << "* "
+                     << common::generators::mermaid::to_mermaid(
+                            message_t::kCall)
+                     << " " << generate_alias(from.value()) << " : "
+                     << from.value().message_name(
+                            select_method_arguments_render_mode())
+                     << std::endl;
+            }
+
+            for (const auto &m : mc) {
+                generate_call(m, ostr);
+            }
+        }
+    }
+
+    for (const auto &sf : config().from()) {
+        if (sf.location_type == location_t::function) {
+            common::model::diagram_element::id_t start_from{0};
+            for (const auto &[k, v] : model().sequences()) {
+                const auto &caller = *model().participants().at(v.from());
+                std::string vfrom = caller.full_name(false);
+                if (vfrom == sf.location) {
+                    LOG_DBG("Found sequence diagram start point: {}", k);
+                    start_from = k;
+                    break;
+                }
+            }
+
+            if (start_from == 0) {
+                LOG_WARN("Failed to find participant with {} for start_from "
+                         "condition",
+                    sf.location);
+                continue;
+            }
+
+            // Use this to break out of recurrent loops
+            std::vector<common::model::diagram_element::id_t>
+                visited_participants;
+
+            const auto &from =
+                model().get_participant<model::function>(start_from);
+
+            if (!from.has_value()) {
+                LOG_WARN("Failed to find participant {} for start_from "
+                         "condition",
+                    sf.location);
+                continue;
+            }
+
+            generate_participant(ostr, start_from);
+
+            std::string from_alias = generate_alias(from.value());
+
+            model::function::message_render_mode render_mode =
+                select_method_arguments_render_mode();
+
+            // For methods or functions in diagrams where they are combined into
+            // file participants, we need to add an 'entry' point call to know
+            // which method relates to the first activity for this 'start_from'
+            // condition
+            if (from.value().type_name() == "method" ||
+                config().combine_free_functions_into_file_participants()) {
+                ostr << indent(1) << "* "
+                     << common::generators::mermaid::to_mermaid(
+                            message_t::kCall)
+                     << " " << from_alias << " : "
+                     << from.value().message_name(render_mode) << std::endl;
+            }
+
+            ostr << indent(1) << "activate " << from_alias << std::endl;
+
+            generate_activity(
+                model().get_activity(start_from), ostr, visited_participants);
+
+            if (from.value().type_name() == "method" ||
+                config().combine_free_functions_into_file_participants()) {
+
+                if (!from.value().is_void()) {
+                    ostr << indent(1) << from_alias << " "
+                         << common::generators::mermaid::to_mermaid(
+                                message_t::kReturn)
+                         << " *"
+                         << " : ";
+
+                    if (config().generate_return_types())
+                        ostr << from.value().return_type();
+
+                    ostr << '\n';
+                }
+            }
+
+            ostr << indent(1) << "deactivate " << from_alias << std::endl;
+        }
+        else {
+            // TODO: Add support for other sequence start location types
+            continue;
+        }
+    }
+}
+
+model::function::message_render_mode
+generator::select_method_arguments_render_mode() const
+{
+    if (config().generate_method_arguments() ==
+        config::method_arguments::abbreviated)
+        return model::function::message_render_mode::abbreviated;
+
+    if (config().generate_method_arguments() == config::method_arguments::none)
+        return model::function::message_render_mode::no_arguments;
+
+    return model::function::message_render_mode::full;
+}
+
+} // namespace clanguml::sequence_diagram::generators::mermaid
diff --git a/src/sequence_diagram/generators/mermaid/sequence_diagram_generator.h b/src/sequence_diagram/generators/mermaid/sequence_diagram_generator.h
new file mode 100644
index 000000000..823f729f2
--- /dev/null
+++ b/src/sequence_diagram/generators/mermaid/sequence_diagram_generator.h
@@ -0,0 +1,141 @@
+/**
+ * @file src/sequence_diagram/generators/mermaid/sequence_diagram_generator.h
+ *
+ * Copyright (c) 2021-2023 Bartek Kryza <bkryza@gmail.com>
+ *
+ * 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 "common/generators/mermaid/generator.h"
+#include "config/config.h"
+#include "sequence_diagram/model/diagram.h"
+#include "sequence_diagram/visitor/translation_unit_visitor.h"
+#include "util/util.h"
+
+#include <glob/glob.hpp>
+
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include <sstream>
+
+namespace clanguml {
+namespace sequence_diagram {
+namespace generators {
+namespace mermaid {
+
+using diagram_config = clanguml::config::sequence_diagram;
+using diagram_model = clanguml::sequence_diagram::model::diagram;
+
+template <typename C, typename D>
+using common_generator = clanguml::common::generators::mermaid::generator<C, D>;
+
+/**
+ * @brief Sequence diagram MermaidJS generator
+ */
+class generator : public common_generator<diagram_config, diagram_model> {
+public:
+    generator(diagram_config &config, diagram_model &model);
+
+    using common_generator<diagram_config, diagram_model>::generate;
+
+    /**
+     * @brief Main generator method.
+     *
+     * This method is called first and coordinates the entire diagram
+     * generation.
+     *
+     * @param ostr Output stream.
+     */
+    void generate_diagram(std::ostream &ostr) const override;
+
+    /**
+     * @brief Generate sequence diagram message.
+     *
+     * @param m Message model
+     * @param ostr Output stream
+     */
+    void generate_call(const clanguml::sequence_diagram::model::message &m,
+        std::ostream &ostr) const;
+
+    /**
+     * @brief Generate sequence diagram return message
+     *
+     * @param m Message model
+     * @param ostr Output stream
+     */
+    void generate_return(const clanguml::sequence_diagram::model::message &m,
+        std::ostream &ostr) const;
+
+    /**
+     * @brief Generate sequence diagram participant
+     *
+     * @param ostr Output stream
+     * @param id Participant id
+     * @param force If true, generate the participant even if its not in
+     *              the set of active participants
+     * @return Id of the generated participant
+     */
+    void generate_participant(
+        std::ostream &ostr, common::id_t id, bool force = false) const;
+
+    /**
+     * @brief Generate sequence diagram participant by name
+     *
+     * This is convenience wrapper over `generate_participant()` by id.
+     *
+     * @param ostr Output stream
+     * @param name Full participant name
+     */
+    void generate_participant(
+        std::ostream &ostr, const std::string &name) const;
+
+    /**
+     * @brief Generate sequence diagram activity.
+     *
+     * @param a Activity model
+     * @param ostr Output stream
+     * @param visited List of already visited participants, this is necessary
+     *                for breaking infinite recursion on recursive calls
+     */
+    void generate_activity(const clanguml::sequence_diagram::model::activity &a,
+        std::ostream &ostr,
+        std::vector<common::model::diagram_element::id_t> &visited) const;
+
+private:
+    /**
+     * @brief Check if specified participant has already been generated.
+     *
+     * @param id Participant id.
+     * @return True, if participant has already been generated.
+     */
+    bool is_participant_generated(common::id_t id) const;
+
+    /**
+     * @brief Generate MermaidJS alias for participant
+     *
+     * @param participant Sequence diagram participant model
+     * @return Particpant alias
+     */
+    std::string generate_alias(const model::participant &participant) const;
+
+    mutable std::set<common::id_t> generated_participants_;
+    model::function::message_render_mode
+    select_method_arguments_render_mode() const;
+};
+
+} // namespace mermaid
+} // namespace generators
+} // namespace sequence_diagram
+} // namespace clanguml
diff --git a/tests/t20001/test_case.h b/tests/t20001/test_case.h
index 2b02bab19..f8706b2dc 100644
--- a/tests/t20001/test_case.h
+++ b/tests/t20001/test_case.h
@@ -66,4 +66,9 @@ TEST_CASE("t20001", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
diff --git a/tests/t20002/test_case.h b/tests/t20002/test_case.h
index 8b281240e..fdfd40810 100644
--- a/tests/t20002/test_case.h
+++ b/tests/t20002/test_case.h
@@ -60,4 +60,10 @@ TEST_CASE("t20002", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
diff --git a/tests/t20003/test_case.h b/tests/t20003/test_case.h
index d5bbbbc4e..f27ced2e0 100644
--- a/tests/t20003/test_case.h
+++ b/tests/t20003/test_case.h
@@ -55,4 +55,10 @@ TEST_CASE("t20003", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
diff --git a/tests/t20004/test_case.h b/tests/t20004/test_case.h
index 82f483c58..eb6ac7477 100644
--- a/tests/t20004/test_case.h
+++ b/tests/t20004/test_case.h
@@ -82,4 +82,10 @@ TEST_CASE("t20004", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20005/test_case.h b/tests/t20005/test_case.h
index e94360772..49f0babe3 100644
--- a/tests/t20005/test_case.h
+++ b/tests/t20005/test_case.h
@@ -56,4 +56,10 @@ TEST_CASE("t20005", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20007/test_case.h b/tests/t20007/test_case.h
index c995b9f54..c16b95d60 100644
--- a/tests/t20007/test_case.h
+++ b/tests/t20007/test_case.h
@@ -66,4 +66,10 @@ TEST_CASE("t20007", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20008/test_case.h b/tests/t20008/test_case.h
index 577796620..47f8a529f 100644
--- a/tests/t20008/test_case.h
+++ b/tests/t20008/test_case.h
@@ -76,4 +76,10 @@ TEST_CASE("t20008", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20009/test_case.h b/tests/t20009/test_case.h
index e36f41fe0..b11a4597b 100644
--- a/tests/t20009/test_case.h
+++ b/tests/t20009/test_case.h
@@ -68,4 +68,10 @@ TEST_CASE("t20009", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20010/test_case.h b/tests/t20010/test_case.h
index 5a5cc9f07..600784b08 100644
--- a/tests/t20010/test_case.h
+++ b/tests/t20010/test_case.h
@@ -70,4 +70,10 @@ TEST_CASE("t20010", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20011/test_case.h b/tests/t20011/test_case.h
index 8d44803cc..26cea6eff 100644
--- a/tests/t20011/test_case.h
+++ b/tests/t20011/test_case.h
@@ -63,4 +63,10 @@ TEST_CASE("t20011", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20013/test_case.h b/tests/t20013/test_case.h
index e3b826a7d..b885fe88a 100644
--- a/tests/t20013/test_case.h
+++ b/tests/t20013/test_case.h
@@ -67,4 +67,10 @@ TEST_CASE("t20013", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20014/test_case.h b/tests/t20014/test_case.h
index 00d194a48..e5910ec70 100644
--- a/tests/t20014/test_case.h
+++ b/tests/t20014/test_case.h
@@ -66,4 +66,10 @@ TEST_CASE("t20014", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20015/test_case.h b/tests/t20015/test_case.h
index 0a05b4a6d..c56f24997 100644
--- a/tests/t20015/test_case.h
+++ b/tests/t20015/test_case.h
@@ -61,4 +61,10 @@ TEST_CASE("t20015", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20016/test_case.h b/tests/t20016/test_case.h
index 15e35993e..92ef295f3 100644
--- a/tests/t20016/test_case.h
+++ b/tests/t20016/test_case.h
@@ -59,4 +59,10 @@ TEST_CASE("t20016", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20017/test_case.h b/tests/t20017/test_case.h
index 8f5e26fb4..e617b4a85 100644
--- a/tests/t20017/test_case.h
+++ b/tests/t20017/test_case.h
@@ -73,4 +73,10 @@ TEST_CASE("t20017", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20018/test_case.h b/tests/t20018/test_case.h
index 1eea53f77..cb3d8d69f 100644
--- a/tests/t20018/test_case.h
+++ b/tests/t20018/test_case.h
@@ -76,4 +76,10 @@ TEST_CASE("t20018", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20019/test_case.h b/tests/t20019/test_case.h
index 903efedaa..68de2fbd8 100644
--- a/tests/t20019/test_case.h
+++ b/tests/t20019/test_case.h
@@ -59,4 +59,10 @@ TEST_CASE("t20019", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20020/test_case.h b/tests/t20020/test_case.h
index 5314b9ef0..63538cbf0 100644
--- a/tests/t20020/test_case.h
+++ b/tests/t20020/test_case.h
@@ -79,4 +79,10 @@ TEST_CASE("t20020", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20021/test_case.h b/tests/t20021/test_case.h
index f2a980006..c4016afbb 100644
--- a/tests/t20021/test_case.h
+++ b/tests/t20021/test_case.h
@@ -85,4 +85,10 @@ TEST_CASE("t20021", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20022/test_case.h b/tests/t20022/test_case.h
index 026930a4c..a3a2bbf02 100644
--- a/tests/t20022/test_case.h
+++ b/tests/t20022/test_case.h
@@ -53,4 +53,10 @@ TEST_CASE("t20022", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20023/test_case.h b/tests/t20023/test_case.h
index 4f17bd6bd..087e2b937 100644
--- a/tests/t20023/test_case.h
+++ b/tests/t20023/test_case.h
@@ -57,4 +57,10 @@ TEST_CASE("t20023", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20024/test_case.h b/tests/t20024/test_case.h
index 57d13c91c..9f5768b0c 100644
--- a/tests/t20024/test_case.h
+++ b/tests/t20024/test_case.h
@@ -63,4 +63,10 @@ TEST_CASE("t20024", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20025/test_case.h b/tests/t20025/test_case.h
index b468ad25d..b46e02458 100644
--- a/tests/t20025/test_case.h
+++ b/tests/t20025/test_case.h
@@ -57,4 +57,10 @@ TEST_CASE("t20025", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20026/test_case.h b/tests/t20026/test_case.h
index cdd561562..da5dd6017 100644
--- a/tests/t20026/test_case.h
+++ b/tests/t20026/test_case.h
@@ -51,4 +51,10 @@ TEST_CASE("t20026", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20027/test_case.h b/tests/t20027/test_case.h
index 4562a71d1..5476d0fec 100644
--- a/tests/t20027/test_case.h
+++ b/tests/t20027/test_case.h
@@ -53,4 +53,10 @@ TEST_CASE("t20027", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20028/test_case.h b/tests/t20028/test_case.h
index b596fa7da..01174a4de 100644
--- a/tests/t20028/test_case.h
+++ b/tests/t20028/test_case.h
@@ -59,4 +59,10 @@ TEST_CASE("t20028", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20029/test_case.h b/tests/t20029/test_case.h
index 6438d32f6..17900066f 100644
--- a/tests/t20029/test_case.h
+++ b/tests/t20029/test_case.h
@@ -83,4 +83,10 @@ TEST_CASE("t20029", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20030/test_case.h b/tests/t20030/test_case.h
index aced91278..167e5ebb4 100644
--- a/tests/t20030/test_case.h
+++ b/tests/t20030/test_case.h
@@ -62,4 +62,10 @@ TEST_CASE("t20030", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20031/test_case.h b/tests/t20031/test_case.h
index 707a91461..01a08bee4 100644
--- a/tests/t20031/test_case.h
+++ b/tests/t20031/test_case.h
@@ -65,4 +65,10 @@ TEST_CASE("t20031", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20032/test_case.h b/tests/t20032/test_case.h
index 9f5d42422..6003423a6 100644
--- a/tests/t20032/test_case.h
+++ b/tests/t20032/test_case.h
@@ -75,4 +75,10 @@ TEST_CASE("t20032", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20033/test_case.h b/tests/t20033/test_case.h
index 22eaff7b9..41703b185 100644
--- a/tests/t20033/test_case.h
+++ b/tests/t20033/test_case.h
@@ -54,4 +54,10 @@ TEST_CASE("t20033", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20034/test_case.h b/tests/t20034/test_case.h
index d184d1ac9..3ad62327f 100644
--- a/tests/t20034/test_case.h
+++ b/tests/t20034/test_case.h
@@ -73,4 +73,10 @@ TEST_CASE("t20034", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20035/test_case.h b/tests/t20035/test_case.h
index 67b3614fa..b73c22f1a 100644
--- a/tests/t20035/test_case.h
+++ b/tests/t20035/test_case.h
@@ -53,4 +53,10 @@ TEST_CASE("t20035", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/t20036/test_case.h b/tests/t20036/test_case.h
index 5f9ca877b..e3e6c548f 100644
--- a/tests/t20036/test_case.h
+++ b/tests/t20036/test_case.h
@@ -69,4 +69,10 @@ TEST_CASE("t20036", "[test-case][sequence]")
 
         save_json(config.output_directory(), diagram->name + ".json", j);
     }
+
+    {
+        auto mmd = generate_sequence_mermaid(diagram, *model);
+
+        save_mermaid(config.output_directory(), diagram->name + ".mmd", mmd);
+    }
 }
\ No newline at end of file
diff --git a/tests/test_cases.cc b/tests/test_cases.cc
index e49adbf06..e760bbab8 100644
--- a/tests/test_cases.cc
+++ b/tests/test_cases.cc
@@ -235,6 +235,14 @@ std::string generate_class_mermaid(
         config, model);
 }
 
+std::string generate_sequence_mermaid(
+    std::shared_ptr<clanguml::config::diagram> config,
+    clanguml::sequence_diagram::model::diagram &model)
+{
+    return detail::generate_diagram_mermaid<clanguml::config::sequence_diagram>(
+        config, model);
+}
+
 template <typename T>
 void save_diagram(const std::filesystem::path &path, const T &diagram)
 {
diff --git a/util/generate_mermaid.py b/util/generate_mermaid.py
index a7cccce08..51fa120b0 100644
--- a/util/generate_mermaid.py
+++ b/util/generate_mermaid.py
@@ -38,7 +38,7 @@ def print_usage():
 for f in files:
     try:
         print(f'Generating Mermaid diagram from {f}')
-        f_svg = Path(f).with_suffix('.png')
+        f_svg = Path(f).with_suffix('.svg')
         subprocess.check_call(['mmdc',  '-i', f, '-o', f_svg])
     except subprocess.CalledProcessError:
         ok = 1