diff --git a/src/web_service/telemetry_json.cpp b/src/web_service/telemetry_json.cpp
index 68e092699..c61522ff1 100644
--- a/src/web_service/telemetry_json.cpp
+++ b/src/web_service/telemetry_json.cpp
@@ -2,8 +2,88 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "common/assert.h"
+#include "core/settings.h"
 #include "web_service/telemetry_json.h"
+#include "web_service/web_backend.h"
 
 namespace WebService {
 
+TelemetryJson::TelemetryJson() {}
+
+template <class T>
+void TelemetryJson::Serialize(Telemetry::FieldType type, const std::string& name, T value) {
+    sections[static_cast<u8>(type)][name] = value;
+}
+
+void TelemetryJson::SerializeSection(Telemetry::FieldType type, const std::string& name) {
+    TopSection()[name] = sections[static_cast<unsigned>(type)];
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<bool>& field) {
+    Serialize(field.GetType(), field.GetName(), field.GetValue());
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<double>& field) {
+    Serialize(field.GetType(), field.GetName(), field.GetValue());
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<float>& field) {
+    Serialize(field.GetType(), field.GetName(), field.GetValue());
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<u8>& field) {
+    Serialize(field.GetType(), field.GetName(), field.GetValue());
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<u16>& field) {
+    Serialize(field.GetType(), field.GetName(), field.GetValue());
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<u32>& field) {
+    Serialize(field.GetType(), field.GetName(), field.GetValue());
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<u64>& field) {
+    Serialize(field.GetType(), field.GetName(), field.GetValue());
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<s8>& field) {
+    Serialize(field.GetType(), field.GetName(), field.GetValue());
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<s16>& field) {
+    Serialize(field.GetType(), field.GetName(), field.GetValue());
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<s32>& field) {
+    Serialize(field.GetType(), field.GetName(), field.GetValue());
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<s64>& field) {
+    Serialize(field.GetType(), field.GetName(), field.GetValue());
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<std::string>& field) {
+    Serialize(field.GetType(), field.GetName(), field.GetValue());
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<const char*>& field) {
+    Serialize(field.GetType(), field.GetName(), std::string(field.GetValue()));
+}
+
+void TelemetryJson::Visit(const Telemetry::Field<std::chrono::microseconds>& field) {
+    Serialize(field.GetType(), field.GetName(), field.GetValue().count());
+}
+
+void TelemetryJson::Complete() {
+    SerializeSection(Telemetry::FieldType::App, "App");
+    SerializeSection(Telemetry::FieldType::Session, "Session");
+    SerializeSection(Telemetry::FieldType::Performance, "Performance");
+    SerializeSection(Telemetry::FieldType::UserFeedback, "UserFeedback");
+    SerializeSection(Telemetry::FieldType::UserConfig, "UserConfig");
+    SerializeSection(Telemetry::FieldType::UserSystem, "UserSystem");
+    PostJson(Settings::values.telemetry_endpoint_url, TopSection().dump());
+}
+
 } // namespace WebService
diff --git a/src/web_service/telemetry_json.h b/src/web_service/telemetry_json.h
index 1f2e08f54..cc511cdd1 100644
--- a/src/web_service/telemetry_json.h
+++ b/src/web_service/telemetry_json.h
@@ -4,6 +4,51 @@
 
 #pragma once
 
+#include <array>
+#include <string>
+#include <json.hpp>
+#include "common/telemetry.h"
+
 namespace WebService {
 
+/**
+ * Implementation of VisitorInterface that serialized telemetry into JSON, and submits it to the
+ * Citra web service
+ */
+class TelemetryJson : public Telemetry::VisitorInterface {
+public:
+    TelemetryJson();
+    ~TelemetryJson() = default;
+
+    void Visit(const Telemetry::Field<bool>& field) override;
+    void Visit(const Telemetry::Field<double>& field) override;
+    void Visit(const Telemetry::Field<float>& field) override;
+    void Visit(const Telemetry::Field<u8>& field) override;
+    void Visit(const Telemetry::Field<u16>& field) override;
+    void Visit(const Telemetry::Field<u32>& field) override;
+    void Visit(const Telemetry::Field<u64>& field) override;
+    void Visit(const Telemetry::Field<s8>& field) override;
+    void Visit(const Telemetry::Field<s16>& field) override;
+    void Visit(const Telemetry::Field<s32>& field) override;
+    void Visit(const Telemetry::Field<s64>& field) override;
+    void Visit(const Telemetry::Field<std::string>& field) override;
+    void Visit(const Telemetry::Field<const char*>& field) override;
+    void Visit(const Telemetry::Field<std::chrono::microseconds>& field) override;
+
+    void Complete() override;
+
+private:
+    nlohmann::json& TopSection() {
+        return sections[static_cast<u8>(Telemetry::FieldType::None)];
+    }
+
+    template <class T>
+    void Serialize(Telemetry::FieldType type, const std::string& name, T value);
+
+    void SerializeSection(Telemetry::FieldType type, const std::string& name);
+
+    nlohmann::json output;
+    std::array<nlohmann::json, 7> sections;
+};
+
 } // namespace WebService