diff --git a/resources/translations/de.json b/resources/translations/de.json
index a041f31..b6fc844 100644
--- a/resources/translations/de.json
+++ b/resources/translations/de.json
@@ -99,6 +99,10 @@
   "settings.branding.window_title_label": "Fenstertitel (optional):",
   "settings.branding.logo_path_label": "Logo/Icon-Datei (optional):",
   "settings.branding.save_as_btn": "Branding speichern",
+  "settings.branding.delete_btn": "Branding löschen",
+  "settings.branding.preview_label": "Vorschau:",
+  "settings.branding.no_icon_selected": "Kein Icon ausgewählt",
+  "settings.branding.preview_default_name": "Default",
   "settings.branding.save_as_title": "Branding speichern",
   "settings.branding.save_as_prompt": "Name für das Branding eingeben:",
   "settings.branding.restart_note": "Branding-Änderungen werden persistent gespeichert und nach einem Neustart vollständig angewendet.",
diff --git a/resources/translations/en.json b/resources/translations/en.json
index 1a471f6..c4e8009 100644
--- a/resources/translations/en.json
+++ b/resources/translations/en.json
@@ -99,6 +99,10 @@
   "settings.branding.window_title_label": "Window title (optional):",
   "settings.branding.logo_path_label": "Logo/Icon file (optional):",
   "settings.branding.save_as_btn": "Save Branding",
+  "settings.branding.delete_btn": "Delete Branding",
+  "settings.branding.preview_label": "Preview:",
+  "settings.branding.no_icon_selected": "No icon selected",
+  "settings.branding.preview_default_name": "Default",
   "settings.branding.save_as_title": "Save Branding",
   "settings.branding.save_as_prompt": "Enter a name for the branding:",
   "settings.branding.restart_note": "Branding changes are persisted immediately and are fully applied after restarting the app.",
diff --git a/resources/translations/fr.json b/resources/translations/fr.json
index ae6b260..67d9bb3 100644
--- a/resources/translations/fr.json
+++ b/resources/translations/fr.json
@@ -98,9 +98,13 @@
   "settings.branding.app_name_label": "Nom de l’application :",
   "settings.branding.window_title_label": "Titre de la fenêtre (facultatif) :",
   "settings.branding.logo_path_label": "Chemin du logo (facultatif) :",
-  "settings.branding.save_as_btn": "Enregistrer comme modèle",
-  "settings.branding.save_as_title": "Enregistrer le modèle de branding",
-  "settings.branding.save_as_prompt": "Entrez un identifiant de modèle (par ex. client_a) :",
+  "settings.branding.save_as_btn": "Enregistrer le branding",
+  "settings.branding.delete_btn": "Supprimer le branding",
+  "settings.branding.preview_label": "Aperçu :",
+  "settings.branding.no_icon_selected": "Aucune icône sélectionnée",
+  "settings.branding.preview_default_name": "Default",
+  "settings.branding.save_as_title": "Enregistrer le branding",
+  "settings.branding.save_as_prompt": "Entrez un nom pour le branding :",
   "settings.branding.restart_note": "Les changements de branding sont enregistrés de façon persistante et seront entièrement appliqués après le redémarrage de l’application.",
   "settings.web_url.label": "URL de l'application web\u00a0:",
   "settings.web_url.placeholder": "p.ex. http://localhost:8080 ou file:///./webapp/index.html",
diff --git a/resources/translations/it.json b/resources/translations/it.json
index 3d1cb5f..4c0dcf6 100644
--- a/resources/translations/it.json
+++ b/resources/translations/it.json
@@ -98,9 +98,13 @@
   "settings.branding.app_name_label": "Nome applicazione:",
   "settings.branding.window_title_label": "Titolo finestra (opzionale):",
   "settings.branding.logo_path_label": "Percorso logo (opzionale):",
-  "settings.branding.save_as_btn": "Salva come modello",
-  "settings.branding.save_as_title": "Salva modello di branding",
-  "settings.branding.save_as_prompt": "Inserisci un ID modello (es. cliente_a):",
+  "settings.branding.save_as_btn": "Salva branding",
+  "settings.branding.delete_btn": "Elimina branding",
+  "settings.branding.preview_label": "Anteprima:",
+  "settings.branding.no_icon_selected": "Nessuna icona selezionata",
+  "settings.branding.preview_default_name": "Default",
+  "settings.branding.save_as_title": "Salva branding",
+  "settings.branding.save_as_prompt": "Inserisci un nome per il branding:",
   "settings.branding.restart_note": "Le modifiche al branding vengono salvate in modo persistente e saranno applicate completamente dopo il riavvio dell’applicazione.",
   "settings.web_url.label": "URL applicazione web:",
   "settings.web_url.placeholder": "es. http://localhost:8080 o file:///./webapp/index.html",
diff --git a/resources/translations/ru.json b/resources/translations/ru.json
index 7e17cf0..938956e 100644
--- a/resources/translations/ru.json
+++ b/resources/translations/ru.json
@@ -98,9 +98,13 @@
   "settings.branding.app_name_label": "Имя приложения:",
   "settings.branding.window_title_label": "Заголовок окна (необязательно):",
   "settings.branding.logo_path_label": "Путь к логотипу (необязательно):",
-  "settings.branding.save_as_btn": "Сохранить как шаблон",
-  "settings.branding.save_as_title": "Сохранить шаблон брендинга",
-  "settings.branding.save_as_prompt": "Введите ID шаблона (например, client_a):",
+  "settings.branding.save_as_btn": "Сохранить брендинг",
+  "settings.branding.delete_btn": "Удалить брендинг",
+  "settings.branding.preview_label": "Предпросмотр:",
+  "settings.branding.no_icon_selected": "Значок не выбран",
+  "settings.branding.preview_default_name": "Default",
+  "settings.branding.save_as_title": "Сохранить брендинг",
+  "settings.branding.save_as_prompt": "Введите имя для брендинга:",
   "settings.branding.restart_note": "Изменения брендинга сохраняются постоянно и будут полностью применены после перезапуска приложения.",
   "settings.web_url.label": "URL веб-приложения:",
   "settings.web_url.placeholder": "например, http://localhost:8080 или file:///./webapp/index.html",
diff --git a/resources/translations/zh.json b/resources/translations/zh.json
index 85c305b..b263d7e 100644
--- a/resources/translations/zh.json
+++ b/resources/translations/zh.json
@@ -98,9 +98,13 @@
   "settings.branding.app_name_label": "应用名称：",
   "settings.branding.window_title_label": "窗口标题（可选）：",
   "settings.branding.logo_path_label": "Logo 路径（可选）：",
-  "settings.branding.save_as_btn": "另存为模板",
-  "settings.branding.save_as_title": "保存品牌模板",
-  "settings.branding.save_as_prompt": "输入模板 ID（例如 customer_a）：",
+  "settings.branding.save_as_btn": "保存品牌配置",
+  "settings.branding.delete_btn": "删除品牌配置",
+  "settings.branding.preview_label": "预览：",
+  "settings.branding.no_icon_selected": "未选择图标",
+  "settings.branding.preview_default_name": "Default",
+  "settings.branding.save_as_title": "保存品牌配置",
+  "settings.branding.save_as_prompt": "输入品牌名称：",
   "settings.branding.restart_note": "品牌更改会被持久保存，并将在应用重启后完整生效。",
   "settings.web_url.label": "Web 应用 URL:",
   "settings.web_url.placeholder": "例如: http://localhost:8080 或 file:///./webapp/index.html",
diff --git a/src/webdrop_bridge/core/branding_manager.py b/src/webdrop_bridge/core/branding_manager.py
index d682938..9c01376 100644
--- a/src/webdrop_bridge/core/branding_manager.py
+++ b/src/webdrop_bridge/core/branding_manager.py
@@ -15,6 +15,7 @@ from webdrop_bridge.config import DEFAULT_CONFIG_DIR_NAME, Config, Configuration
 logger = logging.getLogger(__name__)
 
 DEFAULT_BRANDING_TEMPLATE_ID = "default"
+SUPPORTED_LOGO_SUFFIXES = {".png", ".jpg", ".jpeg", ".bmp", ".svg", ".ico", ".icns"}
 
 
 @dataclass(frozen=True)
@@ -185,6 +186,19 @@ class BrandingManager:
         logo = logo_path.strip()
         resolved_app_name = (app_name or display_name).strip()
 
+        if not safe_id:
+            raise ConfigurationError("Branding requires a name")
+        if not safe_name:
+            raise ConfigurationError("Branding requires a display name")
+        if logo:
+            logo_file = Path(logo)
+            if not logo_file.exists() or not logo_file.is_file():
+                raise ConfigurationError(f"Logo file not found: {logo}")
+            if logo_file.suffix.lower() not in SUPPORTED_LOGO_SUFFIXES:
+                raise ConfigurationError(
+                    "Unsupported logo format. Use PNG, JPG, BMP, SVG, ICO, or ICNS."
+                )
+
         return BrandingTemplate(
             template_id=safe_id,
             display_name=safe_name,
diff --git a/src/webdrop_bridge/ui/settings_dialog.py b/src/webdrop_bridge/ui/settings_dialog.py
index cf2d555..9e61e93 100644
--- a/src/webdrop_bridge/ui/settings_dialog.py
+++ b/src/webdrop_bridge/ui/settings_dialog.py
@@ -4,6 +4,7 @@ import logging
 from pathlib import Path
 from typing import Any, Dict, Optional
 
+from PySide6.QtGui import QIcon, QPixmap
 from PySide6.QtWidgets import (
     QComboBox,
     QDialog,
@@ -193,6 +194,7 @@ class SettingsDialog(QDialog):
         self.branding_display_name_input.setPlaceholderText(
             tr("settings.branding.display_name_label")
         )
+        self.branding_display_name_input.textChanged.connect(self._update_branding_preview)
         layout.addWidget(QLabel(tr("settings.branding.display_name_label")))
         layout.addWidget(self.branding_display_name_input)
 
@@ -200,6 +202,7 @@ class SettingsDialog(QDialog):
         logo_layout = QHBoxLayout()
         self.branding_logo_path_input = QLineEdit()
         self.branding_logo_path_input.setPlaceholderText(tr("settings.branding.logo_path_label"))
+        self.branding_logo_path_input.textChanged.connect(self._update_branding_preview)
         logo_layout.addWidget(self.branding_logo_path_input)
 
         self.browse_branding_logo_btn = QPushButton(tr("settings.log_file.browse_btn"))
@@ -207,10 +210,26 @@ class SettingsDialog(QDialog):
         logo_layout.addWidget(self.browse_branding_logo_btn)
         layout.addLayout(logo_layout)
 
+        layout.addWidget(QLabel(tr("settings.branding.preview_label")))
+        self.branding_preview_name_label = QLabel()
+        self.branding_preview_name_label.setStyleSheet("font-weight: bold;")
+        layout.addWidget(self.branding_preview_name_label)
+
+        self.branding_preview_icon_label = QLabel(tr("settings.branding.no_icon_selected"))
+        self.branding_preview_icon_label.setFixedSize(72, 72)
+        self.branding_preview_icon_label.setStyleSheet(
+            "border: 1px solid #ccc; padding: 4px; background: #fafafa;"
+        )
+        layout.addWidget(self.branding_preview_icon_label)
+
         branding_button_layout = QHBoxLayout()
         self.save_branding_as_btn = QPushButton(tr("settings.branding.save_as_btn"))
         self.save_branding_as_btn.clicked.connect(self._save_branding_as)
         branding_button_layout.addWidget(self.save_branding_as_btn)
+
+        self.delete_branding_btn = QPushButton(tr("settings.branding.delete_btn"))
+        self.delete_branding_btn.clicked.connect(self._delete_branding)
+        branding_button_layout.addWidget(self.delete_branding_btn)
         layout.addLayout(branding_button_layout)
 
         self._load_branding_into_editor(self.branding_combo.currentData() or "default")
@@ -240,10 +259,33 @@ class SettingsDialog(QDialog):
         self.branding_combo.blockSignals(False)
 
     def _load_branding_into_editor(self, template_id: str) -> None:
-        """Load the selected branding template into the editable fields."""
+        """Load the selected branding into the editable fields."""
         template = self.branding_manager.load_template(template_id)
         self.branding_display_name_input.setText(template.display_name)
         self.branding_logo_path_input.setText(template.logo_path)
+        self._update_branding_preview()
+
+    def _update_branding_preview(self) -> None:
+        """Refresh the small branding preview for name and icon."""
+        display_name = self.branding_display_name_input.text().strip() or tr(
+            "settings.branding.preview_default_name"
+        )
+        self.branding_preview_name_label.setText(display_name)
+
+        logo_path = self.branding_logo_path_input.text().strip()
+        if logo_path and Path(logo_path).exists():
+            pixmap = QPixmap(logo_path)
+            if pixmap.isNull():
+                icon = QIcon(logo_path)
+                pixmap = icon.pixmap(64, 64)
+
+            if not pixmap.isNull():
+                self.branding_preview_icon_label.setPixmap(pixmap.scaled(64, 64))
+                self.branding_preview_icon_label.setText("")
+                return
+
+        self.branding_preview_icon_label.setPixmap(QPixmap())
+        self.branding_preview_icon_label.setText(tr("settings.branding.no_icon_selected"))
 
     def _on_branding_selection_changed(self) -> None:
         """Update editable branding fields when a different template is selected."""
@@ -275,10 +317,11 @@ class SettingsDialog(QDialog):
             return
 
         try:
+            display_name = self.branding_display_name_input.text().strip() or branding_name
             template = self.branding_manager.build_template(
                 template_id=branding_name,
-                display_name=branding_name,
-                app_name=branding_name,
+                display_name=display_name,
+                app_name=display_name,
                 logo_path=self.branding_logo_path_input.text(),
             )
             self.branding_manager.save_template(template)
@@ -287,6 +330,19 @@ class SettingsDialog(QDialog):
         except ConfigurationError as e:
             self._show_error(f"Failed to save branding: {e}")
 
+    def _delete_branding(self) -> None:
+        """Delete the currently selected custom branding."""
+        template_id = self.branding_combo.currentData()
+        if not template_id:
+            return
+
+        try:
+            self.branding_manager.delete_template(template_id)
+            self._refresh_branding_combo("default")
+            self._load_branding_into_editor("default")
+        except ConfigurationError as e:
+            self._show_error(f"Failed to delete branding: {e}")
+
     def _create_web_source_tab(self) -> QWidget:
         """Create web source configuration tab."""
         widget = QWidget()
diff --git a/tests/unit/test_branding_manager.py b/tests/unit/test_branding_manager.py
index 2f08abe..f989365 100644
--- a/tests/unit/test_branding_manager.py
+++ b/tests/unit/test_branding_manager.py
@@ -1,6 +1,8 @@
 """Tests for runtime branding template management."""
 
-from webdrop_bridge.config import Config
+import pytest
+
+from webdrop_bridge.config import Config, ConfigurationError
 from webdrop_bridge.core.branding_manager import BrandingManager
 
 
@@ -97,3 +99,28 @@ def test_switching_back_to_default_restores_default_branding(tmp_path):
 
     assert config.app_name == "WebDrop Bridge"
     assert config.branding_display_name == "Default"
+
+
+def test_delete_custom_branding_removes_it(tmp_path):
+    """Custom brandings should be removable while built-ins stay protected."""
+    manager = BrandingManager(base_dir=tmp_path)
+    template = manager.build_template(template_id="Customer B", display_name="Customer B")
+    manager.save_template(template)
+
+    assert manager.has_template("customer_b")
+
+    manager.delete_template("customer_b")
+
+    assert not manager.has_template("customer_b")
+
+
+def test_invalid_logo_file_is_rejected(tmp_path):
+    """Non-existent logo files should not be accepted for saved brandings."""
+    manager = BrandingManager(base_dir=tmp_path)
+
+    with pytest.raises(ConfigurationError):
+        manager.build_template(
+            template_id="customer_c",
+            display_name="Customer C",
+            logo_path=str(tmp_path / "missing-logo.png"),
+        )
diff --git a/tests/unit/test_settings_dialog.py b/tests/unit/test_settings_dialog.py
index e7a973d..e2cfd8f 100644
--- a/tests/unit/test_settings_dialog.py
+++ b/tests/unit/test_settings_dialog.py
@@ -122,6 +122,8 @@ class TestSettingsDialogInitialization:
         assert dialog.branding_display_name_input.text() == "Default"
         assert dialog.branding_logo_path_input is not None
         assert dialog.browse_branding_logo_btn is not None
+        assert dialog.branding_preview_name_label.text() == "Default"
+        assert dialog.delete_branding_btn is not None
 
     def test_save_branding_as_creates_custom_template(
         self, qtbot, sample_config, monkeypatch, tmp_path
@@ -131,8 +133,11 @@ class TestSettingsDialogInitialization:
         dialog = SettingsDialog(sample_config)
         qtbot.addWidget(dialog)
 
+        logo_path = tmp_path / "customer-logo.png"
+        logo_path.write_bytes(b"fake-png-data")
+
         dialog.branding_display_name_input.setText("Customer A")
-        dialog.branding_logo_path_input.setText("/tmp/customer-logo.png")
+        dialog.branding_logo_path_input.setText(str(logo_path))
 
         with patch("PySide6.QtWidgets.QInputDialog.getText", return_value=("Customer A", True)):
             dialog._save_branding_as()