diff --git a/mainwindow.cpp b/mainwindow.cpp
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -21,6 +21,9 @@
 #include "ui_mainwindow.h"
 #include <QByteArray>
 #include <QApplication>
+#include <QFileDialog>
+#include <QFile>
+#include <QTextStream>
 #include <QtDebug>
 #include <qwt_plot.h>
 #include <limits.h>
@@ -45,6 +48,9 @@ MainWindow::MainWindow(QWidget *parent) 
     QObject::connect(ui->actionHelpAbout, &QAction::triggered,
               &aboutDialog, &QWidget::show);
 
+    QObject::connect(ui->actionExportCsv, &QAction::triggered,
+                     this, &MainWindow::onExportCsv);
+
     QObject::connect(&portControl, &PortControl::portToggled,
                      this, &MainWindow::onPortToggled);
 
@@ -550,3 +556,45 @@ QColor MainWindow::makeColor(unsigned in
         return QColor::fromHsv(360*i/n + 360/pow(2,p+1), 255, 230);
     }
 }
+
+void MainWindow::onExportCsv()
+{
+    bool wasPaused = ui->actionPause->isChecked();
+    ui->actionPause->setChecked(true); // pause plotting
+
+    QString fileName = QFileDialog::getSaveFileName(this, tr("Export CSV File"));
+
+    if (fileName.isNull())  // user canceled export
+    {
+        ui->actionPause->setChecked(wasPaused);
+    }
+    else
+    {
+        QFile file(fileName);
+        if (file.open(QIODevice::WriteOnly | QIODevice::Text))
+        {
+            QTextStream fileStream(&file);
+
+            for (unsigned int ci = 0; ci < numOfChannels; ci++)
+            {
+                fileStream << "Channel " << ci;
+                if (ci != numOfChannels-1) fileStream << ",";
+            }
+            fileStream << '\n';
+
+            for (unsigned int i = 0; i < numOfSamples; i++)
+            {
+                for (unsigned int ci = 0; ci < numOfChannels; ci++)
+                {
+                    fileStream << channelsData[ci][i];
+                    if (ci != numOfChannels-1) fileStream << ",";
+                }
+                fileStream << '\n';
+            }
+        }
+        else
+        {
+            qDebug() << "File open error during export: " << file.error();
+        }
+    }
+}
diff --git a/mainwindow.h b/mainwindow.h
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -115,6 +115,8 @@ private slots:
 
     void demoTimerTimeout();
     void enableDemo(bool enabled);
+
+    void onExportCsv();
 };
 
 #endif // MAINWINDOW_H
diff --git a/mainwindow.ui b/mainwindow.ui
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -324,6 +324,13 @@
     <addaction name="actionDemoMode"/>
     <addaction name="actionHelpAbout"/>
    </widget>
+   <widget class="QMenu" name="menuFile">
+    <property name="title">
+     <string>File</string>
+    </property>
+    <addaction name="actionExportCsv"/>
+   </widget>
+   <addaction name="menuFile"/>
    <addaction name="menuHelp"/>
   </widget>
   <widget class="QToolBar" name="mainToolBar">
@@ -372,6 +379,14 @@
     <string>Toggle Demo Mode</string>
    </property>
   </action>
+  <action name="actionExportCsv">
+   <property name="text">
+    <string>Export CSV</string>
+   </property>
+   <property name="toolTip">
+    <string>Export plot data to CSV</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <customwidgets>