diff --git a/filesystemwidget.cpp b/filesystemwidget.cpp
index 804acc2..aa4e680 100644
--- a/filesystemwidget.cpp
+++ b/filesystemwidget.cpp
@@ -1,6 +1,10 @@
 #include "filesystemwidget.h"
 #include <QSettings>
 #include <QVBoxLayout>
+#include <QContextMenuEvent>
+#include <QMenu>
+#include <QSettings>
+#include <QHeaderView>
 
 FilesystemWidget::FilesystemWidget(QAbstractItemModel *model, QWidget *parent) : QWidget(parent)
   , m_model(model)
@@ -34,3 +38,62 @@ void FilesystemWidget::fileClicked(const QModelIndex &index)
 {
     emit fileSelected(index.row());
 }
+
+Filetree::Filetree(QWidget *parent) : QTreeView(parent)
+{
+    QSettings settings;
+    m_rootDir = settings.value("filetree/rootDir", QDir::homePath()).toString();
+    m_fileSystemModel = new QFileSystemModel(this);
+    m_fileSystemModel->setRootPath(m_rootDir);
+    m_fileSystemModel->setNameFilters({"*.fits", "*.fit", "*.xisf", "*.jpg", "*.jpeg", "*.png"});
+    m_fileSystemModel->setNameFilterDisables(false);
+    setModel(m_fileSystemModel);
+    setRootIndex(m_fileSystemModel->index(m_rootDir));
+    header()->restoreState(settings.value("filetree/header").toByteArray());
+}
+
+Filetree::~Filetree()
+{
+    QSettings settings;
+    settings.setValue("filetree/rootDir", m_rootDir);
+    settings.setValue("filetree/header", header()->saveState());
+}
+
+void Filetree::contextMenuEvent(QContextMenuEvent *event)
+{
+    QModelIndex index = indexAt(event->pos());
+    QFileInfo info = m_fileSystemModel->fileInfo(index);
+    QMenu menu;
+    QAction *open = nullptr;
+    QAction *setRoot = nullptr;
+
+    if(info.isFile())
+        open = menu.addAction(tr("Open"));
+
+    if(info.isDir())
+        setRoot = menu.addAction("Set as root");
+
+    QAction *resetRoot = menu.addAction("Reset root");
+    QAction *goUp = menu.addAction("Go up");
+
+    QAction *a = menu.exec(event->globalPos());
+    if(a == open)
+    {
+        emit fileSelected(m_fileSystemModel->filePath(index));
+    }
+    if(a == setRoot && index.isValid())
+    {
+        setRootIndex(index);
+        m_rootDir = m_fileSystemModel->filePath(index);
+    }
+    else if(a == resetRoot)
+    {
+        setRootIndex(QModelIndex());
+        m_rootDir = QDir::rootPath();
+    }
+    else if(a == goUp)
+    {
+        setRootIndex(rootIndex().parent());
+        m_rootDir = m_fileSystemModel->filePath(rootIndex().parent());
+    }
+}
diff --git a/filesystemwidget.h b/filesystemwidget.h
index ae455b7..0999133 100644
--- a/filesystemwidget.h
+++ b/filesystemwidget.h
@@ -4,6 +4,7 @@
 #include <QWidget>
 #include <QFileSystemModel>
 #include <QListView>
+#include <QTreeView>
 
 class FilesystemWidget : public QWidget
 {
@@ -20,4 +21,17 @@ signals:
     void fileSelected(int row);
 };
 
+class Filetree : public QTreeView
+{
+    Q_OBJECT
+    QFileSystemModel *m_fileSystemModel;
+    QString m_rootDir;
+public:
+    explicit Filetree(QWidget *parent = nullptr);
+    ~Filetree();
+    void contextMenuEvent(QContextMenuEvent *event);
+signals:
+    void fileSelected(const QString &path);
+};
+
 #endif // FILESYSTEMWIDGET_H
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 8a2ce57..603fb57 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -55,6 +55,9 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
     m_filesystem = new FilesystemWidget(m_ringList, this);
     connect(m_filesystem, SIGNAL(fileSelected(int)), this, SLOT(loadFile(int)));
 
+    m_filetree = new Filetree(this);
+    connect(m_filetree, &Filetree::fileSelected, this, static_cast<void (MainWindow::*)(const QString &)>(&MainWindow::loadFile));
+
     m_database = new Database(this);
     if(!m_database->init())
         QMessageBox::critical(this, tr("Can't open DB"), tr("Can't open SQLITE database"));
@@ -75,6 +78,12 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
     databaseViewDock->hide();
     addDockWidget(Qt::BottomDockWidgetArea, databaseViewDock);
 
+    QDockWidget *filetreeDock = new QDockWidget(tr("File tree"), this);
+    filetreeDock->setWidget(m_filetree);
+    filetreeDock->setObjectName("filetreeDock");
+    databaseViewDock->hide();
+    addDockWidget(Qt::LeftDockWidgetArea, filetreeDock);
+
     setWindowTitle(tr("Tenmon"));
 
     connect(m_ringList, SIGNAL(pixmapLoaded(Image*)), this, SLOT(pixmapLoaded(Image*)));
@@ -156,6 +165,7 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
     dockMenu->addAction(m_stretchPanel->toggleViewAction());
     dockMenu->addAction(filesystemDock->toggleViewAction());
     dockMenu->addAction(databaseViewDock->toggleViewAction());
+    dockMenu->addAction(filetreeDock->toggleViewAction());
     menuBar()->addMenu(dockMenu);
 
     QMenu *helpMenu = menuBar()->addMenu(tr("Help"));
diff --git a/mainwindow.h b/mainwindow.h
index 7de9ad6..74fe6d6 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -22,6 +22,7 @@ class MainWindow : public QMainWindow
     Database *m_database;
     ImageInfo *m_info;
     FilesystemWidget *m_filesystem;
+    Filetree *m_filetree;
     DataBaseView *m_databaseView;
     static int socketPair[2];
     QSocketNotifier *socketNotifier;