diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 7df4118..64a1c6b 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -3,7 +3,8 @@ set(Boost_USE_STATIC_LIBS ON)
 find_package(Boost 1.62 COMPONENTS date_time REQUIRED)
 find_package(SQLite3 REQUIRED)
 find_package(PkgConfig REQUIRED)
-pkg_check_modules(XLNT REQUIRED xlnt)
+pkg_check_modules(XLNT REQUIRED xlnt>=1.3)
+pkg_check_modules(JSONCPP REQUIRED jsoncpp)
 
 set(CORE_SOURCES
     database.cpp
@@ -13,10 +14,11 @@ set(CORE_SOURCES
     sale.cpp
     marketplace.cpp
     excelreader.cpp
+    jsonutil
 )
 
 add_library(core STATIC ${CORE_SOURCES})
-target_link_libraries(core Boost::boost Boost::date_time sqlite3 ${XLNT_LIBRARIES})
+target_link_libraries(core Boost::boost Boost::date_time sqlite3 ${XLNT_LIBRARIES} ${JSONCPP_LIBRARIES})
 if (WIN32)
     target_link_libraries(core bcrypt)
 endif()
diff --git a/src/core/excelreader.cpp b/src/core/excelreader.cpp
index eee03ef..f136a34 100644
--- a/src/core/excelreader.cpp
+++ b/src/core/excelreader.cpp
@@ -8,15 +8,19 @@ void ExcelReader::readSellersFromFile(const std::string& filename, Marketplace*
     wb.load(filename);
     auto ws = wb.sheet_by_index(0);
 
-    const int START_ROW = 6;
-    const int END_ROW = 349;
+    const int START_ROW = 5;
+    const int END_ROW = 350;
 
     int rowCount{};
     for (const auto& row : ws.rows(false)) {
         // auto test = row[0].value<int>();
-        if (rowCount < START_ROW)
+        if (rowCount < START_ROW) {
+            rowCount++;
             continue;
-        std::cout << row[0].to_string() << "\n";
+        } else if (rowCount > END_ROW) {
+            break;
+        }
+        std::cout << row[0].value<int>() << "\n";
         rowCount++;
     }
 }
diff --git a/src/core/jsonutil.cpp b/src/core/jsonutil.cpp
new file mode 100644
index 0000000..6dc855c
--- /dev/null
+++ b/src/core/jsonutil.cpp
@@ -0,0 +1,54 @@
+#include "jsonutil.h"
+#include "database.h"
+
+#include <json/json.h>
+
+#include <fstream>
+
+void JsonUtil::exportSellers(const std::string& filename, Marketplace* market)
+{
+    Json::Value root;
+    std::ofstream file(filename);
+
+    Json::StreamWriterBuilder builder;
+    builder["commentStyle"] = "None";
+    builder["indentation"] = "   ";
+
+    std::unique_ptr<Json::StreamWriter> writer(builder.newStreamWriter());
+
+    for (const auto& seller : market->getSellers()) {
+        Json::Value newEntry;
+        newEntry["uuid"] = seller->getUuidAsString();
+        newEntry["seller_no"] = seller->getSellerNo();
+        newEntry["last_name"] = seller->getLastName();
+        newEntry["first_name"] = seller->getFirstName();
+        newEntry["num_offered_articles"] = seller->numArticlesOffered();
+        root["sellers"].append(newEntry);
+    }
+
+    writer->write(root, &file);
+}
+
+void JsonUtil::importSellers(const std::string& filename, Marketplace* market)
+{
+    for (auto& seller : market->getSellers())
+    {
+        seller->setState(Seller::State::DELETE);
+    }
+    market->storeToDb(true);
+    
+    Json::Value jsonValues;
+    std::ifstream file(filename);
+    file >> jsonValues;
+
+    for(auto val : jsonValues["sellers"]) {
+        auto seller = std::make_unique<Seller>();
+        seller->setUuidFromString(val["uuid"].asString());
+        seller->setSellerNo(val["seller_no"].asInt());
+        seller->setLastName(val["last_name"].asString());
+        seller->setFirstName(val["first_name"].asString());
+        seller->setNumArticlesOffered(val["num_offered_articles"].asInt());
+        market->getSellers().push_back(std::move(seller));
+    }
+    market->storeToDb();
+}
\ No newline at end of file
diff --git a/src/core/jsonutil.h b/src/core/jsonutil.h
new file mode 100644
index 0000000..0e3a03d
--- /dev/null
+++ b/src/core/jsonutil.h
@@ -0,0 +1,15 @@
+#ifndef JSON_H
+#define JSON_H
+
+#include "marketplace.h"
+
+#include <string>
+
+class JsonUtil
+{
+  public:
+    static void exportSellers(const std::string& filename, Marketplace* market);
+    static void importSellers(const std::string& filename, Marketplace* market);
+};
+
+#endif
\ No newline at end of file
diff --git a/src/core/marketplace.h b/src/core/marketplace.h
index 0751b04..9bf6542 100644
--- a/src/core/marketplace.h
+++ b/src/core/marketplace.h
@@ -16,9 +16,6 @@ using SalesVec = std::vector<std::unique_ptr<Sale>>;
 using BasketVec = std::vector<std::unique_ptr<Article>>;
 } // namespace
 
-struct Basket {
-};
-
 class Marketplace
 {
   public:
diff --git a/src/gui/kima2.cpp b/src/gui/kima2.cpp
index baf9cb7..b8886cf 100644
--- a/src/gui/kima2.cpp
+++ b/src/gui/kima2.cpp
@@ -14,8 +14,8 @@ int main(int argc, char* argv[])
 
     // Set the locale to german, so that currency is correct
     // std::locale german("de_DE.utf-8");
-    std::locale myLocale("");
-    std::locale::global(myLocale);
+    //std::locale myLocale("");
+    //std::locale::global(myLocale);
 
     QApplication kimaApp{argc, argv};
 
diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index de48a3b..5d12161 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -2,6 +2,7 @@
 
 #include "basketmodel.h"
 #include "config.h"
+#include "jsonutil.h"
 #include "pricedialog.h"
 #include "reportdialog.h"
 #include "salemodel.h"
@@ -61,8 +62,12 @@ MainWindow::MainWindow()
         this->setWindowTitle("KIMA2 - Kasse Nr. " +
                              QSettings().value("global/cashPointNo").toString());
     });
-    connect(ui_.importExcelAction, &QAction::triggered, this,
-            &MainWindow::onImportExcelActionTriggered);
+    connect(ui_.importSellerExcelAction, &QAction::triggered, this,
+            &MainWindow::onImportSellerExcelActionTriggered);
+    connect(ui_.importSellerJsonAction, &QAction::triggered, this,
+            &MainWindow::onImportSellerJsonActionTriggered);
+    connect(ui_.exportSellerJsonAction, &QAction::triggered, this,
+            &MainWindow::onExportSellerJsonActionTriggered);
 }
 
 void MainWindow::onActionEditSellerTriggered()
@@ -239,7 +244,7 @@ void MainWindow::onAbout()
             ">info@rustysoft.de</a>&gt;</p>");
 }
 
-void MainWindow::onImportExcelActionTriggered()
+void MainWindow::onImportSellerExcelActionTriggered()
 {
     if (!marketplace_->getSales().empty()) {
         QMessageBox(QMessageBox::Icon::Information, "Import nicht möglich",
@@ -253,4 +258,29 @@ void MainWindow::onImportExcelActionTriggered()
                                                  "Excel Dateien (*.xlsx *.xls)");
 
     ExcelReader::readSellersFromFile(filename.toStdString(), marketplace_.get());
+}
+
+void MainWindow::onImportSellerJsonActionTriggered()
+{
+    if (!marketplace_->getSales().empty()) {
+        QMessageBox(QMessageBox::Icon::Information, "Import nicht möglich",
+                    "Der Import ist nicht möglich, da schon Verkäufe getätigt wurden.",
+                    QMessageBox::StandardButton::Ok, this)
+            .exec();
+        return;
+    }
+
+    auto filename = QFileDialog::getOpenFileName(this, "Verkäufer importieren", QString(),
+                                                 "JSON Dateien (*.json)");
+
+    JsonUtil::importSellers(filename.toStdString(), marketplace_.get());
+}
+
+
+void MainWindow::onExportSellerJsonActionTriggered()
+{
+    auto filename = QFileDialog::getSaveFileName(this, "Verkäufer exportieren", QString(),
+                                                 "JSON Dateien (*.json)");
+
+    JsonUtil::exportSellers(filename.toStdString(), marketplace_.get());
 }
\ No newline at end of file
diff --git a/src/gui/mainwindow.h b/src/gui/mainwindow.h
index 8c87f91..77f59c6 100644
--- a/src/gui/mainwindow.h
+++ b/src/gui/mainwindow.h
@@ -32,7 +32,9 @@ class MainWindow : public QMainWindow
     void onActionEditSellerTriggered();
     void onSellerNoEditCheckSellerNo();
     void onPaidButtonTriggered();
-    void onImportExcelActionTriggered();
+    void onImportSellerExcelActionTriggered();
+    void onImportSellerJsonActionTriggered();
+    void onExportSellerJsonActionTriggered();
     void setSaleModel();
 
     Ui::MainWindow ui_;
diff --git a/src/gui/mainwindow.ui b/src/gui/mainwindow.ui
index 56c493c..f0f54a6 100644
--- a/src/gui/mainwindow.ui
+++ b/src/gui/mainwindow.ui
@@ -403,8 +403,16 @@ drucken</string>
     <property name="title">
      <string>&amp;Verkäufer</string>
     </property>
+    <widget class="QMenu" name="importSellerMenu">
+     <property name="title">
+      <string>Importieren</string>
+     </property>
+     <addaction name="importSellerExcelAction"/>
+     <addaction name="importSellerJsonAction"/>
+    </widget>
     <addaction name="actionEditSeller"/>
-    <addaction name="importExcelAction"/>
+    <addaction name="importSellerMenu"/>
+    <addaction name="exportSellerJsonAction"/>
    </widget>
    <widget class="QMenu" name="menuHilfe">
     <property name="title">
@@ -459,9 +467,19 @@ drucken</string>
     <string>Auswertung</string>
    </property>
   </action>
-  <action name="importExcelAction">
+  <action name="exportSellerJsonAction">
    <property name="text">
-    <string>Importieren (Excel)</string>
+    <string>Exportieren (JSON)</string>
+   </property>
+  </action>
+  <action name="importSellerExcelAction">
+   <property name="text">
+    <string>Aus Excel-Datei</string>
+   </property>
+  </action>
+  <action name="importSellerJsonAction">
+   <property name="text">
+    <string>Aus JSON-Datei</string>
    </property>
   </action>
  </widget>