diff --git a/source/DataModel.cpp b/source/DataModel.cpp
index ad78dc5..ba97a59 100644
--- a/source/DataModel.cpp
+++ b/source/DataModel.cpp
@@ -29,32 +29,6 @@ DataModel::DataModel(QObject *parent)
 	connect(&m_genitiv, &GenitivModel::dataChanged, this, &DataModel::genitivModelChanged);
 }
 
-void DataModel::write(QJsonObject &target) const
-{
-	write(m_metaData, target, "MetaData");
-	write(m_verbEnd, target, "VerbEnd");
-	write(m_genus, target, "Genus");
-	write(m_plural, target, "Plural");
-	write(m_akkusativ, target, "Akkusativ");
-	write(m_dativ, target, "Dativ");
-	write(m_v2Svk, target, "V2Svk");
-	write(m_passiv, target, "Passiv");
-	write(m_genitiv, target, "Genitiv");
-}
-
-void DataModel::read(const QJsonObject &source)
-{
-	read(m_metaData, source, "MetaData");
-	read(m_verbEnd, source, "VerbEnd");
-	read(m_genus, source, "Genus");
-	read(m_plural, source, "Plural");
-	read(m_akkusativ, source, "Akkusativ");
-	read(m_dativ, source, "Dativ");
-	read(m_v2Svk, source, "V2Svk");
-	read(m_passiv, source, "Passiv");
-	read(m_genitiv, source, "Genitiv");
-}
-
 void DataModel::writeProtoBuf(std::ostream &outStream) const
 {
 	ESGRAF48::DataModel dataModel;
diff --git a/source/DataModel.h b/source/DataModel.h
index 2ac876d..4030321 100644
--- a/source/DataModel.h
+++ b/source/DataModel.h
@@ -34,9 +34,6 @@ public:
 public:
 	DataModel(QObject *parent);
 
-	void write(QJsonObject &target) const;
-	void read(const QJsonObject &source);
-
 	std::string toHtml() const;
 
 	void writeProtoBuf(std::ostream &outStream) const;
diff --git a/source/MetaData/MetaDataModel.cpp b/source/MetaData/MetaDataModel.cpp
index 8bf51af..cc5dd87 100644
--- a/source/MetaData/MetaDataModel.cpp
+++ b/source/MetaData/MetaDataModel.cpp
@@ -112,24 +112,6 @@ bool MetaDataModel::setData(const QModelIndex &modelIndex, const QVariant &value
 	return valueChanged;
 }
 
-void MetaDataModel::write(QJsonObject &json) const
-{
-	json["participant name"] = m_participant;
-	json["instructor name"] = m_instructor;
-	json["date of birth"] = m_dateOfBirth.toString(Qt::ISODate);
-	json["date of test"] = m_dateOfTest.toString(Qt::ISODate);
-	json["remarks"] = m_remarks;
-}
-
-void MetaDataModel::read(const QJsonObject &json)
-{
-	setData(index(0, 0), json["participant name"].toVariant(), Qt::EditRole);
-	setData(index(0, 1), json["instructor name"].toVariant(), Qt::EditRole);
-	setData(index(0, 2), json["date of birth"].toVariant(), Qt::EditRole);
-	setData(index(0, 3), json["date of test"].toVariant(), Qt::EditRole);
-	setData(index(0, 4), json["remarks"].toVariant(), Qt::EditRole);
-}
-
 void MetaDataModel::readProtoBuf(const ESGRAF48::MetaDataModel &model)
 {
 	setData(index(0, 0), QString::fromStdString(model.participantname()));
diff --git a/source/MetaData/MetaDataModel.h b/source/MetaData/MetaDataModel.h
index 1b216d6..78a9e14 100644
--- a/source/MetaData/MetaDataModel.h
+++ b/source/MetaData/MetaDataModel.h
@@ -30,9 +30,6 @@ public:
 	bool setData(const QModelIndex &index, const QVariant &value,
 		int role = Qt::EditRole) override;
 
-	void write(QJsonObject &json) const;
-	void read(const QJsonObject &json);
-
 	void readProtoBuf(const ESGRAF48::MetaDataModel &model);
 	void writeProtoBuf(ESGRAF48::MetaDataModel &model) const;
 
diff --git a/source/mainwindow.cpp b/source/mainwindow.cpp
index 18642ab..0d86a4d 100644
--- a/source/mainwindow.cpp
+++ b/source/mainwindow.cpp
@@ -74,25 +74,8 @@ void MainWindow::openFile()
 
 	closeFile();
 
-	if (true)
-	{
-		std::fstream protoInFile(filename.toStdString(), std::ios::in | std::ios::binary);
-		m_dataModel->readProtoBuf(protoInFile);
-	}
-	else
-	{
-		QFile loadFile(filename);
-		if (!loadFile.open(QFile::ReadOnly))
-		{
-			qWarning("Could not open file");
-			return;
-		}
-
-		QByteArray byteData = loadFile.readAll();
-		QJsonDocument loadDoc = QJsonDocument::fromJson(byteData);
-
-		m_dataModel->read(loadDoc.object());
-	}
+	std::fstream protoInFile(filename.toStdString(), std::ios::in | std::ios::binary);
+	m_dataModel->readProtoBuf(protoInFile);
 
 	setWindowModified(false);
 	setWindowTitle(filename + "[*]");
@@ -175,24 +158,10 @@ void MainWindow::closeEvent(QCloseEvent *event)
 
 void MainWindow::saveFile(const QString &filename)
 {
-	if (true)
-	{
-		std::fstream protoOutFile(filename.toStdString(),
-		                          std::ios::out | std::ios::trunc | std::ios::binary);
-		m_dataModel->writeProtoBuf(protoOutFile);
-	}
-	else
-	{
-		QJsonObject saveData;
-		m_dataModel->write(saveData);
+	std::fstream protoOutFile(filename.toStdString(),
+	                          std::ios::out | std::ios::trunc | std::ios::binary);
+	m_dataModel->writeProtoBuf(protoOutFile);
 
-		QJsonDocument saveDoc(saveData);
-
-		QFile saveFile(filename);
-		saveFile.open(QFile::WriteOnly);
-		saveFile.write(saveDoc.toJson());
-		saveFile.close();
-	}
 	qDebug() << "Wrote" << filename;
 
 	setWindowTitle(filename + "[*]");