diff --git a/src/citra_qt/bootmanager.cpp b/src/citra_qt/bootmanager.cpp
index d09c356f4..9c9e99232 100644
--- a/src/citra_qt/bootmanager.cpp
+++ b/src/citra_qt/bootmanager.cpp
@@ -10,9 +10,6 @@
 #include <QOpenGLContext>
 #include <QOpenGLFunctions>
 #include <QOpenGLFunctions_3_3_Core>
-#include <QOpenGLWindow>
-#include <QScreen>
-#include <QWindow>
 #include <fmt/format.h>
 #include "citra_qt/bootmanager.h"
 #include "citra_qt/main.h"
@@ -233,8 +230,8 @@ void GRenderWindow::OnFramebufferSizeChanged() {
     // Screen changes potentially incur a change in screen DPI, hence we should update the
     // framebuffer size
     const qreal pixel_ratio = windowPixelRatio();
-    const u32 width = this->width() * pixel_ratio;
-    const u32 height = this->height() * pixel_ratio;
+    const u32 width = static_cast<u32>(this->width() * pixel_ratio);
+    const u32 height = static_cast<u32>(this->height() * pixel_ratio);
     UpdateCurrentFramebufferLayout(width, height);
 }
 
diff --git a/src/citra_qt/bootmanager.h b/src/citra_qt/bootmanager.h
index 40946abb6..c0f1134b8 100644
--- a/src/citra_qt/bootmanager.h
+++ b/src/citra_qt/bootmanager.h
@@ -16,7 +16,6 @@
 #include "core/frontend/emu_window.h"
 
 class QKeyEvent;
-class QScreen;
 class QTouchEvent;
 class QOffscreenSurface;
 class QOpenGLContext;
diff --git a/src/citra_qt/camera/camera_util.cpp b/src/citra_qt/camera/camera_util.cpp
index 8e67ca452..878ac910c 100644
--- a/src/citra_qt/camera/camera_util.cpp
+++ b/src/citra_qt/camera/camera_util.cpp
@@ -175,9 +175,9 @@ std::vector<u16> Rgb2Yuv(const QImage& source, int width, int height) {
     auto dest = buffer.begin();
     bool write = false;
     int py, pu, pv;
-    for (int y = 0; y < height; ++y) {
-        for (int x = 0; x < width; ++x) {
-            QRgb rgb = source.pixel(x, y);
+    for (int j = 0; j < height; ++j) {
+        for (int i = 0; i < width; ++i) {
+            QRgb rgb = source.pixel(i, j);
             int r = qRed(rgb);
             int g = qGreen(rgb);
             int b = qBlue(rgb);
diff --git a/src/citra_qt/camera/qt_multimedia_camera.cpp b/src/citra_qt/camera/qt_multimedia_camera.cpp
index 0e977cc6e..f7c3b14d8 100644
--- a/src/citra_qt/camera/qt_multimedia_camera.cpp
+++ b/src/citra_qt/camera/qt_multimedia_camera.cpp
@@ -12,9 +12,8 @@
 
 namespace Camera {
 
-QList<QVideoFrame::PixelFormat> QtCameraSurface::supportedPixelFormats(
-    QAbstractVideoBuffer::HandleType handleType) const {
-    Q_UNUSED(handleType);
+QList<QVideoFrame::PixelFormat> QtCameraSurface::supportedPixelFormats([
+    [maybe_unused]] QAbstractVideoBuffer::HandleType handleType) const {
     return QList<QVideoFrame::PixelFormat>()
            << QVideoFrame::Format_ARGB32 << QVideoFrame::Format_ARGB32_Premultiplied
            << QVideoFrame::Format_RGB32 << QVideoFrame::Format_RGB24 << QVideoFrame::Format_RGB565
diff --git a/src/citra_qt/configuration/configure_audio.cpp b/src/citra_qt/configuration/configure_audio.cpp
index e84c1c4a8..40d2ae759 100644
--- a/src/citra_qt/configuration/configure_audio.cpp
+++ b/src/citra_qt/configuration/configure_audio.cpp
@@ -61,7 +61,8 @@ void ConfigureAudio::SetConfiguration() {
     SetAudioDeviceFromDeviceID();
 
     ui->toggle_audio_stretching->setChecked(Settings::values.enable_audio_stretching);
-    ui->volume_slider->setValue(Settings::values.volume * ui->volume_slider->maximum());
+    ui->volume_slider->setValue(
+        static_cast<int>(Settings::values.volume * ui->volume_slider->maximum()));
     SetVolumeIndicatorText(ui->volume_slider->sliderPosition());
 
     int selection;
diff --git a/src/citra_qt/configuration/configure_camera.cpp b/src/citra_qt/configuration/configure_camera.cpp
index 1ee577988..c11dbca62 100644
--- a/src/citra_qt/configuration/configure_camera.cpp
+++ b/src/citra_qt/configuration/configure_camera.cpp
@@ -184,7 +184,7 @@ void ConfigureCamera::StartPreviewing() {
     ui->preview_box->setHidden(false);
     ui->preview_button->setHidden(true);
     preview_width = ui->preview_box->size().width();
-    preview_height = preview_width * 0.75;
+    preview_height = static_cast<int>(preview_width * 0.75);
     ui->preview_box->setToolTip(
         tr("Resolution: %1*%2")
             .arg(QString::number(preview_width), QString::number(preview_height)));
@@ -232,7 +232,7 @@ void ConfigureCamera::timerEvent(QTimerEvent* event) {
     }
     std::vector<u16> frame = previewing_camera->ReceiveFrame();
     int width = ui->preview_box->size().width();
-    int height = width * 0.75;
+    int height = static_cast<int>(width * 0.75);
     if (width != preview_width || height != preview_height) {
         StopPreviewing();
         return;
diff --git a/src/citra_qt/configuration/configure_input.cpp b/src/citra_qt/configuration/configure_input.cpp
index c1ce931d6..64fb7c840 100644
--- a/src/citra_qt/configuration/configure_input.cpp
+++ b/src/citra_qt/configuration/configure_input.cpp
@@ -256,7 +256,7 @@ ConfigureInput::ConfigureInput(QWidget* parent)
             }
         });
         connect(analog_map_deadzone_and_modifier_slider[analog_id], &QSlider::valueChanged, [=] {
-            const float slider_value = analog_map_deadzone_and_modifier_slider[analog_id]->value();
+            const int slider_value = analog_map_deadzone_and_modifier_slider[analog_id]->value();
             if (analogs_param[analog_id].Get("engine", "") == "sdl") {
                 analog_map_deadzone_and_modifier_slider_label[analog_id]->setText(
                     tr("Deadzone: %1%").arg(slider_value));
diff --git a/src/citra_qt/configuration/configure_motion_touch.cpp b/src/citra_qt/configuration/configure_motion_touch.cpp
index 7573e2217..b0398a77d 100644
--- a/src/citra_qt/configuration/configure_motion_touch.cpp
+++ b/src/citra_qt/configuration/configure_motion_touch.cpp
@@ -168,10 +168,10 @@ void ConfigureMotionTouch::UpdateUiDisplay() {
 void ConfigureMotionTouch::ConnectEvents() {
     connect(ui->motion_provider,
             static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this,
-            [this](int index) { UpdateUiDisplay(); });
+            [this]([[maybe_unused]] int index) { UpdateUiDisplay(); });
     connect(ui->touch_provider,
             static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this,
-            [this](int index) { UpdateUiDisplay(); });
+            [this]([[maybe_unused]] int index) { UpdateUiDisplay(); });
     connect(ui->udp_test, &QPushButton::clicked, this, &ConfigureMotionTouch::OnCemuhookUDPTest);
     connect(ui->touch_calibration_config, &QPushButton::clicked, this,
             &ConfigureMotionTouch::OnConfigureTouchCalibration);
diff --git a/src/citra_qt/configuration/configure_touch_from_button.cpp b/src/citra_qt/configuration/configure_touch_from_button.cpp
index 12473e3f6..376ab6ada 100644
--- a/src/citra_qt/configuration/configure_touch_from_button.cpp
+++ b/src/citra_qt/configuration/configure_touch_from_button.cpp
@@ -326,7 +326,8 @@ void ConfigureTouchFromButton::OnBindingChanged(QStandardItem* item) {
     }
 }
 
-void ConfigureTouchFromButton::OnBindingDeleted(const QModelIndex& parent, int first, int last) {
+void ConfigureTouchFromButton::OnBindingDeleted([[maybe_unused]] const QModelIndex& parent,
+                                                int first, int last) {
     for (int i = first; i <= last; ++i) {
         auto ix = binding_list_model->index(i, 0);
         if (!ix.isValid()) {
@@ -513,7 +514,7 @@ void TouchScreenPreview::mouseMoveEvent(QMouseEvent* event) {
     }
 }
 
-void TouchScreenPreview::leaveEvent(QEvent* event) {
+void TouchScreenPreview::leaveEvent([[maybe_unused]] QEvent* event) {
     if (coord_label) {
         coord_label->clear();
     }
diff --git a/src/citra_qt/debugger/graphics/graphics.cpp b/src/citra_qt/debugger/graphics/graphics.cpp
index 65d10f78b..1a3c0157c 100644
--- a/src/citra_qt/debugger/graphics/graphics.cpp
+++ b/src/citra_qt/debugger/graphics/graphics.cpp
@@ -14,7 +14,7 @@ GPUCommandStreamItemModel::GPUCommandStreamItemModel(QObject* parent)
             &GPUCommandStreamItemModel::OnGXCommandFinishedInternal);
 }
 
-int GPUCommandStreamItemModel::rowCount(const QModelIndex& parent) const {
+int GPUCommandStreamItemModel::rowCount([[maybe_unused]] const QModelIndex& parent) const {
     return command_count;
 }
 
diff --git a/src/citra_qt/debugger/graphics/graphics_breakpoints.cpp b/src/citra_qt/debugger/graphics/graphics_breakpoints.cpp
index 477762cff..55ab0a98e 100644
--- a/src/citra_qt/debugger/graphics/graphics_breakpoints.cpp
+++ b/src/citra_qt/debugger/graphics/graphics_breakpoints.cpp
@@ -16,11 +16,11 @@ BreakPointModel::BreakPointModel(std::shared_ptr<Pica::DebugContext> debug_conte
       at_breakpoint(debug_context->at_breakpoint),
       active_breakpoint(debug_context->active_breakpoint) {}
 
-int BreakPointModel::columnCount(const QModelIndex& parent) const {
+int BreakPointModel::columnCount([[maybe_unused]] const QModelIndex& parent) const {
     return 1;
 }
 
-int BreakPointModel::rowCount(const QModelIndex& parent) const {
+int BreakPointModel::rowCount([[maybe_unused]] const QModelIndex& parent) const {
     return static_cast<int>(Pica::DebugContext::Event::NumEvents);
 }
 
diff --git a/src/citra_qt/debugger/graphics/graphics_cmdlists.cpp b/src/citra_qt/debugger/graphics/graphics_cmdlists.cpp
index 9b94b17d6..af99c111c 100644
--- a/src/citra_qt/debugger/graphics/graphics_cmdlists.cpp
+++ b/src/citra_qt/debugger/graphics/graphics_cmdlists.cpp
@@ -57,11 +57,11 @@ public:
 
 GPUCommandListModel::GPUCommandListModel(QObject* parent) : QAbstractListModel(parent) {}
 
-int GPUCommandListModel::rowCount(const QModelIndex& parent) const {
+int GPUCommandListModel::rowCount([[maybe_unused]] const QModelIndex& parent) const {
     return static_cast<int>(pica_trace.writes.size());
 }
 
-int GPUCommandListModel::columnCount(const QModelIndex& parent) const {
+int GPUCommandListModel::columnCount([[maybe_unused]] const QModelIndex& parent) const {
     return 4;
 }
 
@@ -89,7 +89,8 @@ QVariant GPUCommandListModel::data(const QModelIndex& index, int role) const {
     return QVariant();
 }
 
-QVariant GPUCommandListModel::headerData(int section, Qt::Orientation orientation, int role) const {
+QVariant GPUCommandListModel::headerData(int section, [[maybe_unused]] Qt::Orientation orientation,
+                                         int role) const {
     switch (role) {
     case Qt::DisplayRole: {
         switch (section) {
diff --git a/src/citra_qt/debugger/graphics/graphics_surface.cpp b/src/citra_qt/debugger/graphics/graphics_surface.cpp
index 1e11ca371..95a7df824 100644
--- a/src/citra_qt/debugger/graphics/graphics_surface.cpp
+++ b/src/citra_qt/debugger/graphics/graphics_surface.cpp
@@ -398,7 +398,6 @@ void GraphicsSurfaceWidget::Pick(int x, int y) {
         default:
             return QStringLiteral("Unhandled format");
         }
-        return QString{};
     };
 
     QString nibbles;
diff --git a/src/citra_qt/debugger/graphics/graphics_tracing.cpp b/src/citra_qt/debugger/graphics/graphics_tracing.cpp
index c24576834..a38d15bc5 100644
--- a/src/citra_qt/debugger/graphics/graphics_tracing.cpp
+++ b/src/citra_qt/debugger/graphics/graphics_tracing.cpp
@@ -12,12 +12,12 @@
 #include <QMessageBox>
 #include <QPushButton>
 #include <boost/range/algorithm/copy.hpp>
+#include <nihstro/float24.h>
 #include "citra_qt/debugger/graphics/graphics_tracing.h"
 #include "common/common_types.h"
 #include "core/hw/gpu.h"
 #include "core/hw/lcd.h"
 #include "core/tracer/recorder.h"
-#include "nihstro/float24.h"
 #include "video_core/pica_state.h"
 
 GraphicsTracingWidget::GraphicsTracingWidget(std::shared_ptr<Pica::DebugContext> debug_context,
diff --git a/src/citra_qt/debugger/graphics/graphics_vertex_shader.cpp b/src/citra_qt/debugger/graphics/graphics_vertex_shader.cpp
index 91695f43a..5ce5d7996 100644
--- a/src/citra_qt/debugger/graphics/graphics_vertex_shader.cpp
+++ b/src/citra_qt/debugger/graphics/graphics_vertex_shader.cpp
@@ -29,15 +29,16 @@ using nihstro::SwizzlePattern;
 GraphicsVertexShaderModel::GraphicsVertexShaderModel(GraphicsVertexShaderWidget* parent)
     : QAbstractTableModel(parent), par(parent) {}
 
-int GraphicsVertexShaderModel::columnCount(const QModelIndex& parent) const {
+int GraphicsVertexShaderModel::columnCount([[maybe_unused]] const QModelIndex& parent) const {
     return 3;
 }
 
-int GraphicsVertexShaderModel::rowCount(const QModelIndex& parent) const {
+int GraphicsVertexShaderModel::rowCount([[maybe_unused]] const QModelIndex& parent) const {
     return static_cast<int>(par->info.code.size());
 }
 
-QVariant GraphicsVertexShaderModel::headerData(int section, Qt::Orientation orientation,
+QVariant GraphicsVertexShaderModel::headerData(int section,
+                                               [[maybe_unused]] Qt::Orientation orientation,
                                                int role) const {
     switch (role) {
     case Qt::DisplayRole: {
diff --git a/src/citra_qt/debugger/graphics/graphics_vertex_shader.h b/src/citra_qt/debugger/graphics/graphics_vertex_shader.h
index aeb827c3a..166b6ba23 100644
--- a/src/citra_qt/debugger/graphics/graphics_vertex_shader.h
+++ b/src/citra_qt/debugger/graphics/graphics_vertex_shader.h
@@ -6,8 +6,8 @@
 
 #include <QAbstractTableModel>
 #include <QTreeView>
+#include <nihstro/parser_shbin.h>
 #include "citra_qt/debugger/graphics/graphics_breakpoint_observer.h"
-#include "nihstro/parser_shbin.h"
 #include "video_core/shader/debug_data.h"
 #include "video_core/shader/shader.h"
 
diff --git a/src/citra_qt/debugger/ipc/recorder.cpp b/src/citra_qt/debugger/ipc/recorder.cpp
index ef634d750..b4ed84ad0 100644
--- a/src/citra_qt/debugger/ipc/recorder.cpp
+++ b/src/citra_qt/debugger/ipc/recorder.cpp
@@ -2,6 +2,7 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <QBrush>
 #include <QString>
 #include <QTreeWidgetItem>
 #include <fmt/format.h>
@@ -72,16 +73,16 @@ void IPCRecorderWidget::OnEntryUpdated(IPCDebugger::RequestRecord record) {
         service = QStringLiteral("%1 (%2)").arg(service, record.is_hle ? tr("HLE") : tr("LLE"));
     }
 
-    QTreeWidgetItem item{
+    QTreeWidgetItem entry{
         {QString::number(record.id), GetStatusStr(record), service, GetFunctionName(record)}};
 
     const int row_id = record.id - id_offset;
     if (ui->main->invisibleRootItem()->childCount() > row_id) {
         records[row_id] = record;
-        (*ui->main->invisibleRootItem()->child(row_id)) = item;
+        (*ui->main->invisibleRootItem()->child(row_id)) = entry;
     } else {
         records.emplace_back(record);
-        ui->main->invisibleRootItem()->addChild(new QTreeWidgetItem(item));
+        ui->main->invisibleRootItem()->addChild(new QTreeWidgetItem(entry));
     }
 
     if (record.status == IPCDebugger::RequestStatus::HLEUnimplemented ||
@@ -90,7 +91,7 @@ void IPCRecorderWidget::OnEntryUpdated(IPCDebugger::RequestRecord record) {
 
         auto* item = ui->main->invisibleRootItem()->child(row_id);
         for (int column = 0; column < item->columnCount(); ++column) {
-            item->setBackgroundColor(column, QColor::fromRgb(255, 0, 0));
+            item->setBackground(column, QBrush(QColor::fromRgb(255, 0, 0)));
         }
     }
 
diff --git a/src/citra_qt/debugger/profiler.cpp b/src/citra_qt/debugger/profiler.cpp
index e005d01a2..be51e61c1 100644
--- a/src/citra_qt/debugger/profiler.cpp
+++ b/src/citra_qt/debugger/profiler.cpp
@@ -24,17 +24,17 @@ public:
     MicroProfileWidget(QWidget* parent = nullptr);
 
 protected:
-    void paintEvent(QPaintEvent* ev) override;
-    void showEvent(QShowEvent* ev) override;
-    void hideEvent(QHideEvent* ev) override;
+    void paintEvent(QPaintEvent* event) override;
+    void showEvent(QShowEvent* event) override;
+    void hideEvent(QHideEvent* event) override;
 
-    void mouseMoveEvent(QMouseEvent* ev) override;
-    void mousePressEvent(QMouseEvent* ev) override;
-    void mouseReleaseEvent(QMouseEvent* ev) override;
-    void wheelEvent(QWheelEvent* ev) override;
+    void mouseMoveEvent(QMouseEvent* event) override;
+    void mousePressEvent(QMouseEvent* event) override;
+    void mouseReleaseEvent(QMouseEvent* event) override;
+    void wheelEvent(QWheelEvent* event) override;
 
-    void keyPressEvent(QKeyEvent* ev) override;
-    void keyReleaseEvent(QKeyEvent* ev) override;
+    void keyPressEvent(QKeyEvent* event) override;
+    void keyReleaseEvent(QKeyEvent* event) override;
 
 private:
     /// This timer is used to redraw the widget's contents continuously. To save resources, it only
@@ -82,18 +82,18 @@ QAction* MicroProfileDialog::toggleViewAction() {
     return toggle_view_action;
 }
 
-void MicroProfileDialog::showEvent(QShowEvent* ev) {
+void MicroProfileDialog::showEvent(QShowEvent* event) {
     if (toggle_view_action) {
         toggle_view_action->setChecked(isVisible());
     }
-    QWidget::showEvent(ev);
+    QWidget::showEvent(event);
 }
 
-void MicroProfileDialog::hideEvent(QHideEvent* ev) {
+void MicroProfileDialog::hideEvent(QHideEvent* event) {
     if (toggle_view_action) {
         toggle_view_action->setChecked(isVisible());
     }
-    QWidget::hideEvent(ev);
+    QWidget::hideEvent(event);
 }
 
 #if MICROPROFILE_ENABLED
@@ -112,7 +112,7 @@ MicroProfileWidget::MicroProfileWidget(QWidget* parent) : QWidget(parent) {
     connect(&update_timer, &QTimer::timeout, this, qOverload<>(&MicroProfileWidget::update));
 }
 
-void MicroProfileWidget::paintEvent(QPaintEvent* ev) {
+void MicroProfileWidget::paintEvent([[maybe_unused]] QPaintEvent* event) {
     QPainter painter(this);
 
     // The units used by Microprofile for drawing are based in pixels on a 96 dpi display.
@@ -132,51 +132,51 @@ void MicroProfileWidget::paintEvent(QPaintEvent* ev) {
     mp_painter = nullptr;
 }
 
-void MicroProfileWidget::showEvent(QShowEvent* ev) {
+void MicroProfileWidget::showEvent(QShowEvent* event) {
     update_timer.start(15); // ~60 Hz
-    QWidget::showEvent(ev);
+    QWidget::showEvent(event);
 }
 
-void MicroProfileWidget::hideEvent(QHideEvent* ev) {
+void MicroProfileWidget::hideEvent(QHideEvent* event) {
     update_timer.stop();
-    QWidget::hideEvent(ev);
+    QWidget::hideEvent(event);
 }
 
-void MicroProfileWidget::mouseMoveEvent(QMouseEvent* ev) {
-    MicroProfileMousePosition(ev->x() / x_scale, ev->y() / y_scale, 0);
-    ev->accept();
+void MicroProfileWidget::mouseMoveEvent(QMouseEvent* event) {
+    MicroProfileMousePosition(event->x() / x_scale, event->y() / y_scale, 0);
+    event->accept();
 }
 
-void MicroProfileWidget::mousePressEvent(QMouseEvent* ev) {
-    MicroProfileMousePosition(ev->x() / x_scale, ev->y() / y_scale, 0);
-    MicroProfileMouseButton(ev->buttons() & Qt::LeftButton, ev->buttons() & Qt::RightButton);
-    ev->accept();
+void MicroProfileWidget::mousePressEvent(QMouseEvent* event) {
+    MicroProfileMousePosition(event->x() / x_scale, event->y() / y_scale, 0);
+    MicroProfileMouseButton(event->buttons() & Qt::LeftButton, event->buttons() & Qt::RightButton);
+    event->accept();
 }
 
-void MicroProfileWidget::mouseReleaseEvent(QMouseEvent* ev) {
-    MicroProfileMousePosition(ev->x() / x_scale, ev->y() / y_scale, 0);
-    MicroProfileMouseButton(ev->buttons() & Qt::LeftButton, ev->buttons() & Qt::RightButton);
-    ev->accept();
+void MicroProfileWidget::mouseReleaseEvent(QMouseEvent* event) {
+    MicroProfileMousePosition(event->x() / x_scale, event->y() / y_scale, 0);
+    MicroProfileMouseButton(event->buttons() & Qt::LeftButton, event->buttons() & Qt::RightButton);
+    event->accept();
 }
 
-void MicroProfileWidget::wheelEvent(QWheelEvent* ev) {
-    MicroProfileMousePosition(ev->x() / x_scale, ev->y() / y_scale, ev->delta() / 120);
-    ev->accept();
+void MicroProfileWidget::wheelEvent(QWheelEvent* event) {
+    MicroProfileMousePosition(event->x() / x_scale, event->y() / y_scale, event->delta() / 120);
+    event->accept();
 }
 
-void MicroProfileWidget::keyPressEvent(QKeyEvent* ev) {
-    if (ev->key() == Qt::Key_Control) {
+void MicroProfileWidget::keyPressEvent(QKeyEvent* event) {
+    if (event->key() == Qt::Key_Control) {
         // Inform MicroProfile that the user is holding Ctrl.
         MicroProfileModKey(1);
     }
-    QWidget::keyPressEvent(ev);
+    QWidget::keyPressEvent(event);
 }
 
-void MicroProfileWidget::keyReleaseEvent(QKeyEvent* ev) {
-    if (ev->key() == Qt::Key_Control) {
+void MicroProfileWidget::keyReleaseEvent(QKeyEvent* event) {
+    if (event->key() == Qt::Key_Control) {
         MicroProfileModKey(0);
     }
-    QWidget::keyReleaseEvent(ev);
+    QWidget::keyReleaseEvent(event);
 }
 
 // These functions are called by MicroProfileDraw to draw the interface elements on the screen.
diff --git a/src/citra_qt/debugger/profiler.h b/src/citra_qt/debugger/profiler.h
index e2a542767..43d470aee 100644
--- a/src/citra_qt/debugger/profiler.h
+++ b/src/citra_qt/debugger/profiler.h
@@ -17,8 +17,8 @@ public:
     QAction* toggleViewAction();
 
 protected:
-    void showEvent(QShowEvent* ev) override;
-    void hideEvent(QHideEvent* ev) override;
+    void showEvent(QShowEvent* event) override;
+    void hideEvent(QHideEvent* event) override;
 
 private:
     QAction* toggle_view_action = nullptr;
diff --git a/src/citra_qt/debugger/wait_tree.cpp b/src/citra_qt/debugger/wait_tree.cpp
index 907c5f6bb..d46d99758 100644
--- a/src/citra_qt/debugger/wait_tree.cpp
+++ b/src/citra_qt/debugger/wait_tree.cpp
@@ -83,9 +83,9 @@ std::vector<std::unique_ptr<WaitTreeThread>> WaitTreeItem::MakeThreadItemList()
         const auto& threads =
             Core::System::GetInstance().Kernel().GetThreadManager(i).GetThreadList();
         item_list.reserve(item_list.size() + threads.size());
-        for (std::size_t i = 0; i < threads.size(); ++i) {
-            item_list.push_back(std::make_unique<WaitTreeThread>(*threads[i]));
-            item_list.back()->row = i;
+        for (std::size_t j = 0; j < threads.size(); ++j) {
+            item_list.push_back(std::make_unique<WaitTreeThread>(*threads[j]));
+            item_list.back()->row = j;
         }
     }
     return item_list;
diff --git a/src/citra_qt/game_list.cpp b/src/citra_qt/game_list.cpp
index d75df2859..f2c0860c7 100644
--- a/src/citra_qt/game_list.cpp
+++ b/src/citra_qt/game_list.cpp
@@ -768,6 +768,6 @@ void GameListPlaceholder::onUpdateThemedIcons() {
     image->setPixmap(QIcon::fromTheme(QStringLiteral("plus_folder")).pixmap(200));
 }
 
-void GameListPlaceholder::mouseDoubleClickEvent(QMouseEvent* event) {
+void GameListPlaceholder::mouseDoubleClickEvent([[maybe_unused]] QMouseEvent* event) {
     emit GameListPlaceholder::AddDirectory();
 }
diff --git a/src/citra_qt/loading_screen.cpp b/src/citra_qt/loading_screen.cpp
index dff964174..7b9537ac9 100644
--- a/src/citra_qt/loading_screen.cpp
+++ b/src/citra_qt/loading_screen.cpp
@@ -3,21 +3,16 @@
 // Refer to the license.txt file included.
 
 #include <unordered_map>
-#include <QBuffer>
-#include <QByteArray>
 #include <QGraphicsOpacityEffect>
-#include <QHBoxLayout>
-#include <QIODevice>
 #include <QImage>
 #include <QLabel>
 #include <QPainter>
-#include <QPalette>
 #include <QPixmap>
 #include <QProgressBar>
 #include <QPropertyAnimation>
+#include <QString>
 #include <QStyleOption>
 #include <QTime>
-#include <QtConcurrent/QtConcurrentRun>
 #include "citra_qt/loading_screen.h"
 #include "common/logging/log.h"
 #include "core/loader/loader.h"
diff --git a/src/citra_qt/loading_screen.h b/src/citra_qt/loading_screen.h
index 59e841f9d..fb18f2be9 100644
--- a/src/citra_qt/loading_screen.h
+++ b/src/citra_qt/loading_screen.h
@@ -6,7 +6,6 @@
 
 #include <chrono>
 #include <memory>
-#include <QString>
 #include <QWidget>
 
 namespace Loader {
diff --git a/src/citra_qt/main.cpp b/src/citra_qt/main.cpp
index c8639f616..b93df716e 100644
--- a/src/citra_qt/main.cpp
+++ b/src/citra_qt/main.cpp
@@ -1459,7 +1459,6 @@ void GMainWindow::InstallCIA(QStringList filepaths) {
     progress_bar->setMaximum(INT_MAX);
 
     QtConcurrent::run([&, filepaths] {
-        QString current_path;
         Service::AM::InstallStatus status;
         const auto cia_progress = [&](std::size_t written, std::size_t total) {
             emit UpdateProgress(written, total);
@@ -2102,15 +2101,15 @@ void GMainWindow::OnMouseActivity() {
     ShowMouseCursor();
 }
 
-void GMainWindow::mouseMoveEvent(QMouseEvent* event) {
+void GMainWindow::mouseMoveEvent([[maybe_unused]] QMouseEvent* event) {
     OnMouseActivity();
 }
 
-void GMainWindow::mousePressEvent(QMouseEvent* event) {
+void GMainWindow::mousePressEvent([[maybe_unused]] QMouseEvent* event) {
     OnMouseActivity();
 }
 
-void GMainWindow::mouseReleaseEvent(QMouseEvent* event) {
+void GMainWindow::mouseReleaseEvent([[maybe_unused]] QMouseEvent* event) {
     OnMouseActivity();
 }
 
diff --git a/src/citra_qt/multiplayer/state.cpp b/src/citra_qt/multiplayer/state.cpp
index 6fa6d1809..28f884a12 100644
--- a/src/citra_qt/multiplayer/state.cpp
+++ b/src/citra_qt/multiplayer/state.cpp
@@ -232,9 +232,8 @@ bool MultiplayerState::OnCloseRoom() {
             return true;
         }
         // Save ban list
-        if (auto room = Network::GetRoom().lock()) {
-            UISettings::values.ban_list = std::move(room->GetBanList());
-        }
+        UISettings::values.ban_list = std::move(room->GetBanList());
+
         room->Destroy();
         announce_multiplayer_session->Stop();
         LOG_DEBUG(Frontend, "Closed the room (as a server)");
diff --git a/src/citra_qt/updater/updater.cpp b/src/citra_qt/updater/updater.cpp
index 8701eee7b..33d5c9da0 100644
--- a/src/citra_qt/updater/updater.cpp
+++ b/src/citra_qt/updater/updater.cpp
@@ -133,8 +133,9 @@ bool UpdaterPrivate::StartUpdateCheck() {
     connect(main_process,
             static_cast<void (QProcess::*)(int, QProcess::ExitStatus)>(&QProcess::finished), this,
             &UpdaterPrivate::UpdaterReady, Qt::QueuedConnection);
-    connect(main_process, static_cast<void (QProcess::*)(QProcess::ProcessError)>(&QProcess::error),
-            this, &UpdaterPrivate::UpdaterError, Qt::QueuedConnection);
+    connect(main_process,
+            static_cast<void (QProcess::*)(QProcess::ProcessError)>(&QProcess::errorOccurred), this,
+            &UpdaterPrivate::UpdaterError, Qt::QueuedConnection);
 
     main_process->start(QIODevice::ReadOnly);
     running = true;
diff --git a/src/citra_qt/util/clickable_label.cpp b/src/citra_qt/util/clickable_label.cpp
index e990423a9..2a1ea5df1 100644
--- a/src/citra_qt/util/clickable_label.cpp
+++ b/src/citra_qt/util/clickable_label.cpp
@@ -4,8 +4,9 @@
 
 #include "citra_qt/util/clickable_label.h"
 
-ClickableLabel::ClickableLabel(QWidget* parent, Qt::WindowFlags f) : QLabel(parent) {}
+ClickableLabel::ClickableLabel(QWidget* parent, [[maybe_unused]] Qt::WindowFlags f)
+    : QLabel(parent) {}
 
-void ClickableLabel::mouseReleaseEvent(QMouseEvent* event) {
+void ClickableLabel::mouseReleaseEvent([[maybe_unused]] QMouseEvent* event) {
     emit clicked();
 }
diff --git a/src/core/cheats/cheats.cpp b/src/core/cheats/cheats.cpp
index f4b48fd06..37700bb2c 100644
--- a/src/core/cheats/cheats.cpp
+++ b/src/core/cheats/cheats.cpp
@@ -102,7 +102,7 @@ void CheatEngine::LoadCheatFile() {
     }
 }
 
-void CheatEngine::RunCallback([[maybe_unused]] u64 userdata, int cycles_late) {
+void CheatEngine::RunCallback([[maybe_unused]] u64 userdata, s64 cycles_late) {
     {
         std::shared_lock<std::shared_mutex> lock(cheats_list_mutex);
         for (auto& cheat : cheats_list) {
diff --git a/src/core/cheats/cheats.h b/src/core/cheats/cheats.h
index 1dfed7ab8..c45c1044f 100644
--- a/src/core/cheats/cheats.h
+++ b/src/core/cheats/cheats.h
@@ -35,7 +35,7 @@ public:
 
 private:
     void LoadCheatFile();
-    void RunCallback(u64 userdata, int cycles_late);
+    void RunCallback(u64 userdata, s64 cycles_late);
     std::vector<std::shared_ptr<CheatBase>> cheats_list;
     mutable std::shared_mutex cheats_list_mutex;
     Core::TimingEventType* event;
diff --git a/src/core/cheats/gateway_cheat.cpp b/src/core/cheats/gateway_cheat.cpp
index b36309d26..f5b5ff0b4 100644
--- a/src/core/cheats/gateway_cheat.cpp
+++ b/src/core/cheats/gateway_cheat.cpp
@@ -198,7 +198,7 @@ GatewayCheat::CheatLine::CheatLine(const std::string& line) {
         address = first & 0x0FFFFFFF;
         value = std::stoul(line.substr(9, 8), 0, 16);
         cheat_line = line;
-    } catch (const std::logic_error& e) {
+    } catch (const std::logic_error&) {
         type = CheatType::Null;
         cheat_line = line;
         LOG_ERROR(Core_Cheats, "Cheat contains invalid line: {}", line);
diff --git a/src/core/file_sys/patch.cpp b/src/core/file_sys/patch.cpp
index c93767165..f4fb05ac2 100644
--- a/src/core/file_sys/patch.cpp
+++ b/src/core/file_sys/patch.cpp
@@ -15,8 +15,8 @@
 namespace FileSys::Patch {
 
 bool ApplyIpsPatch(const std::vector<u8>& ips, std::vector<u8>& buffer) {
-    u32 cursor = 5;
-    u32 patch_length = ips.size() - 3;
+    std::size_t cursor = 5;
+    std::size_t patch_length = ips.size() - 3;
     std::string ips_header(ips.begin(), ips.begin() + 5);
 
     if (ips_header != "PATCH") {
@@ -30,7 +30,7 @@ bool ApplyIpsPatch(const std::vector<u8>& ips, std::vector<u8>& buffer) {
         if (eof_check == "EOF")
             return false;
 
-        u32 offset = ips[cursor] << 16 | ips[cursor + 1] << 8 | ips[cursor + 2];
+        std::size_t offset = ips[cursor] << 16 | ips[cursor + 1] << 8 | ips[cursor + 2];
         std::size_t length = ips[cursor + 3] << 8 | ips[cursor + 4];
 
         // check for an rle record
diff --git a/src/core/hle/service/csnd/csnd_snd.cpp b/src/core/hle/service/csnd/csnd_snd.cpp
index 4dc96d77c..160ce313f 100644
--- a/src/core/hle/service/csnd/csnd_snd.cpp
+++ b/src/core/hle/service/csnd/csnd_snd.cpp
@@ -459,8 +459,8 @@ void CSND_SND::ReleaseCapUnit(Kernel::HLERequestContext& ctx) {
 
 void CSND_SND::FlushDataCache(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp(ctx, 0x9, 2, 2);
-    const VAddr address = rp.Pop<u32>();
-    const u32 size = rp.Pop<u32>();
+    [[maybe_unused]] const VAddr address = rp.Pop<u32>();
+    [[maybe_unused]] const u32 size = rp.Pop<u32>();
     const auto process = rp.PopObject<Kernel::Process>();
 
     IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
@@ -472,8 +472,8 @@ void CSND_SND::FlushDataCache(Kernel::HLERequestContext& ctx) {
 
 void CSND_SND::StoreDataCache(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp(ctx, 0xA, 2, 2);
-    const VAddr address = rp.Pop<u32>();
-    const u32 size = rp.Pop<u32>();
+    [[maybe_unused]] const VAddr address = rp.Pop<u32>();
+    [[maybe_unused]] const u32 size = rp.Pop<u32>();
     const auto process = rp.PopObject<Kernel::Process>();
 
     IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
@@ -485,8 +485,8 @@ void CSND_SND::StoreDataCache(Kernel::HLERequestContext& ctx) {
 
 void CSND_SND::InvalidateDataCache(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp(ctx, 0xB, 2, 2);
-    const VAddr address = rp.Pop<u32>();
-    const u32 size = rp.Pop<u32>();
+    [[maybe_unused]] const VAddr address = rp.Pop<u32>();
+    [[maybe_unused]] const u32 size = rp.Pop<u32>();
     const auto process = rp.PopObject<Kernel::Process>();
 
     IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
diff --git a/src/core/hle/service/dsp/dsp_dsp.cpp b/src/core/hle/service/dsp/dsp_dsp.cpp
index ea179ef55..ff6fecb3b 100644
--- a/src/core/hle/service/dsp/dsp_dsp.cpp
+++ b/src/core/hle/service/dsp/dsp_dsp.cpp
@@ -202,8 +202,8 @@ void DSP_DSP::UnloadComponent(Kernel::HLERequestContext& ctx) {
 
 void DSP_DSP::FlushDataCache(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp(ctx, 0x13, 2, 2);
-    const VAddr address = rp.Pop<u32>();
-    const u32 size = rp.Pop<u32>();
+    [[maybe_unused]] const VAddr address = rp.Pop<u32>();
+    [[maybe_unused]] const u32 size = rp.Pop<u32>();
     const auto process = rp.PopObject<Kernel::Process>();
 
     IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
@@ -215,8 +215,8 @@ void DSP_DSP::FlushDataCache(Kernel::HLERequestContext& ctx) {
 
 void DSP_DSP::InvalidateDataCache(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp(ctx, 0x14, 2, 2);
-    const VAddr address = rp.Pop<u32>();
-    const u32 size = rp.Pop<u32>();
+    [[maybe_unused]] const VAddr address = rp.Pop<u32>();
+    [[maybe_unused]] const u32 size = rp.Pop<u32>();
     const auto process = rp.PopObject<Kernel::Process>();
 
     IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
index bf165d9fb..c4a429ccb 100644
--- a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
@@ -236,7 +236,7 @@ private:
 template <SwizzlePattern::Selector (SwizzlePattern::*getter)(int) const>
 std::string GetSelectorSrc(const SwizzlePattern& pattern) {
     std::string out;
-    for (std::size_t i = 0; i < 4; ++i) {
+    for (int i = 0; i < 4; ++i) {
         switch ((pattern.*getter)(i)) {
         case SwizzlePattern::Selector::x:
             out += 'x';
diff --git a/src/web_service/announce_room_json.cpp b/src/web_service/announce_room_json.cpp
index 44d0b0578..e64bd7ea4 100644
--- a/src/web_service/announce_room_json.cpp
+++ b/src/web_service/announce_room_json.cpp
@@ -30,7 +30,7 @@ void from_json(const nlohmann::json& json, Room::Member& member) {
     try {
         member.username = json.at("username").get<std::string>();
         member.avatar_url = json.at("avatarUrl").get<std::string>();
-    } catch (const nlohmann::detail::out_of_range& e) {
+    } catch (const nlohmann::detail::out_of_range&) {
         member.username = member.avatar_url = "";
         LOG_DEBUG(Network, "Member \'{}\' isn't authenticated", member.nickname);
     }
@@ -59,7 +59,7 @@ void from_json(const nlohmann::json& json, Room& room) {
     room.name = json.at("name").get<std::string>();
     try {
         room.description = json.at("description").get<std::string>();
-    } catch (const nlohmann::detail::out_of_range& e) {
+    } catch (const nlohmann::detail::out_of_range&) {
         room.description = "";
         LOG_DEBUG(Network, "Room \'{}\' doesn't contain a description", room.name);
     }