diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..ea1e767
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.21)
+project(ImageBrowser LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_AUTOMOC ON)
+
+find_package(Qt6 REQUIRED COMPONENTS Widgets)
+
+qt_add_executable(ImageBrowser
+    main.cpp
+    mainwindow.cpp
+    mainwindow.h
+    imagemodel.cpp
+    imagemodel.h
+)
+
+target_link_libraries(ImageBrowser PRIVATE Qt6::Widgets)
\ No newline at end of file
diff --git a/imagemodel.cpp b/imagemodel.cpp
new file mode 100644
index 0000000..f22f119
--- /dev/null
+++ b/imagemodel.cpp
@@ -0,0 +1,70 @@
+#include "imagemodel.h"
+
+#include <QDir>
+#include <QImageReader>
+#include <QFileInfo>
+
+ImageModel::ImageModel(QObject *parent)
+    : QAbstractListModel(parent)
+{
+}
+
+void ImageModel::setDirectory(const QString &path)
+{
+    beginResetModel();
+    m_items.clear();
+
+    QDir dir(path);
+    QStringList filters;
+
+    const auto formats = QImageReader::supportedImageFormats();
+    for (const QByteArray &fmt : formats)
+        filters << "*." + fmt;
+
+    dir.setNameFilters(filters);
+    dir.setFilter(QDir::Files);
+
+    for (const QFileInfo &file : dir.entryInfoList())
+    {
+        QImageReader reader(file.absoluteFilePath());
+        reader.setAutoTransform(true);
+
+        QImage image = reader.read();
+        QPixmap thumb = QPixmap::fromImage(
+            image.scaled(128, 128, Qt::KeepAspectRatio,
+                         Qt::SmoothTransformation));
+
+        m_items.append({file.absoluteFilePath(), thumb});
+    }
+
+    endResetModel();
+}
+
+QString ImageModel::filePath(const QModelIndex &index) const
+{
+    if (!index.isValid())
+        return {};
+
+    return m_items[index.row()].path;
+}
+
+int ImageModel::rowCount(const QModelIndex &) const
+{
+    return m_items.size();
+}
+
+QVariant ImageModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid())
+        return {};
+
+    const Item &item = m_items[index.row()];
+
+    if (role == Qt::DecorationRole)
+        return item.thumbnail;
+
+    if (role == Qt::DisplayRole)
+        return QFileInfo(item.path).fileName();
+
+    return {};
+}
diff --git a/imagemodel.h b/imagemodel.h
new file mode 100644
index 0000000..3915a94
--- /dev/null
+++ b/imagemodel.h
@@ -0,0 +1,28 @@
+#pragma once
+
+#include <QAbstractListModel>
+#include <QPixmap>
+#include <QVector>
+
+class ImageModel : public QAbstractListModel
+{
+    Q_OBJECT
+
+public:
+    explicit ImageModel(QObject *parent = nullptr);
+
+    void setDirectory(const QString &path);
+    QString filePath(const QModelIndex &index) const;
+
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role) const override;
+
+private:
+    struct Item
+    {
+        QString path;
+        QPixmap thumbnail;
+    };
+
+    QVector<Item> m_items;
+};
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..6ce4d29
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,13 @@
+#include <QApplication>
+#include "mainwindow.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+
+    MainWindow w;
+    w.resize(1200, 700);
+    w.show();
+
+    return app.exec();
+}
diff --git a/mainwindow.cpp b/mainwindow.cpp
new file mode 100644
index 0000000..a724b32
--- /dev/null
+++ b/mainwindow.cpp
@@ -0,0 +1,90 @@
+#include "mainwindow.h"
+#include "imagemodel.h"
+
+#include <QFileSystemModel>
+#include <QTreeView>
+#include <QListView>
+#include <QLabel>
+#include <QSplitter>
+#include <QDir>
+#include <QImageReader>
+#include <QHeaderView>
+
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+{
+    setupUi();
+    setupConnections();
+}
+
+void MainWindow::setupUi()
+{
+    // Folder model (left pane)
+    m_dirModel = new QFileSystemModel(this);
+    m_dirModel->setFilter(QDir::AllDirs | QDir::NoDotAndDotDot);
+    m_dirModel->setRootPath(QDir::homePath());
+
+    m_treeView = new QTreeView;
+    m_treeView->setModel(m_dirModel);
+    m_treeView->setRootIndex(m_dirModel->index(QDir::homePath()));
+    m_treeView->header()->hide();
+    m_treeView->setColumnHidden(1, true);
+    m_treeView->setColumnHidden(2, true);
+    m_treeView->setColumnHidden(3, true);
+
+    // Thumbnail model (center pane)
+    m_imageModel = new ImageModel(this);
+
+    m_listView = new QListView;
+    m_listView->setModel(m_imageModel);
+    m_listView->setViewMode(QListView::IconMode);
+    m_listView->setIconSize(QSize(128, 128));
+    m_listView->setResizeMode(QListView::Adjust);
+    m_listView->setSelectionMode(QAbstractItemView::SingleSelection);
+    m_listView->setSpacing(10);
+
+    // Preview pane (right)
+    m_previewLabel = new QLabel;
+    m_previewLabel->setAlignment(Qt::AlignCenter);
+    m_previewLabel->setMinimumWidth(300);
+
+    // Layout
+    QSplitter *rightSplitter = new QSplitter(Qt::Horizontal);
+    rightSplitter->addWidget(m_listView);
+    rightSplitter->addWidget(m_previewLabel);
+    rightSplitter->setStretchFactor(0, 3);
+    rightSplitter->setStretchFactor(1, 2);
+
+    QSplitter *mainSplitter = new QSplitter(Qt::Horizontal);
+    mainSplitter->addWidget(m_treeView);
+    mainSplitter->addWidget(rightSplitter);
+    mainSplitter->setStretchFactor(1, 1);
+
+    setCentralWidget(mainSplitter);
+}
+
+void MainWindow::setupConnections()
+{
+    connect(m_treeView, &QTreeView::clicked, this,
+            [this](const QModelIndex &index)
+    {
+        QString path = m_dirModel->filePath(index);
+        m_imageModel->setDirectory(path);
+    });
+
+    connect(m_listView, &QListView::clicked, this,
+            [this](const QModelIndex &index)
+    {
+        QString path = m_imageModel->filePath(index);
+
+        QImageReader reader(path);
+        reader.setAutoTransform(true);
+        QImage image = reader.read();
+
+        m_previewLabel->setPixmap(
+            QPixmap::fromImage(image).scaled(
+                m_previewLabel->size(),
+                Qt::KeepAspectRatio,
+                Qt::SmoothTransformation));
+    });
+}
diff --git a/mainwindow.h b/mainwindow.h
new file mode 100644
index 0000000..43ecfe2
--- /dev/null
+++ b/mainwindow.h
@@ -0,0 +1,28 @@
+#pragma once
+
+#include <QMainWindow>
+
+class QTreeView;
+class QListView;
+class QLabel;
+class QFileSystemModel;
+class ImageModel;
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit MainWindow(QWidget *parent = nullptr);
+
+private:
+    void setupUi();
+    void setupConnections();
+
+    QFileSystemModel *m_dirModel;
+    ImageModel *m_imageModel;
+
+    QTreeView *m_treeView;
+    QListView *m_listView;
+    QLabel *m_previewLabel;
+};