diff --git a/cmake/templates/IOSInfo.plist.in b/cmake/templates/IOSInfo.plist.in
index f14de6e4..8ca2587e 100644
--- a/cmake/templates/IOSInfo.plist.in
+++ b/cmake/templates/IOSInfo.plist.in
@@ -32,8 +32,9 @@
     <string>${MACOSX_BUNDLE_COPYRIGHT}</string>
     <key>UILaunchStoryboardName</key>
     <string>${MACOSX_BUNDLE_LAUNCH_STORYBOARD}</string>
-    ${MACOSX_NSAPP_TRANSPORT_SECURITY}
-    ${IOS_SUPPORTED_INTERFACE_ORIENTATIONS}
+${MACOSX_NSAPP_TRANSPORT_SECURITY}
+${IOS_SUPPORTED_INTERFACE_ORIENTATIONS}
+${IOS_URI_HANDLERS}
+${IOS_ADDITIONAL_PLIST_PROPERTIES}
 </dict>
 </plist>
-
diff --git a/cmake/templates/OSXInfo.plist.in b/cmake/templates/OSXInfo.plist.in
index cfd75570..b1075386 100644
--- a/cmake/templates/OSXInfo.plist.in
+++ b/cmake/templates/OSXInfo.plist.in
@@ -36,6 +36,7 @@
     <true/>
     <key>NSHumanReadableCopyright</key>
     <string>${MACOSX_BUNDLE_COPYRIGHT}</string>
-    ${MACOSX_NSAPP_TRANSPORT_SECURITY}
+${MACOSX_NSAPP_TRANSPORT_SECURITY}
+${MACOSX_ADDITIONAL_PLIST_PROPERTIES}
 </dict>
 </plist>
diff --git a/cmake/utilities/ios.cmake b/cmake/utilities/ios.cmake
index b6d7db22..d61f1053 100644
--- a/cmake/utilities/ios.cmake
+++ b/cmake/utilities/ios.cmake
@@ -43,22 +43,22 @@ macro(ios_build_orientation_entries OUT )
     set(multiValueArgs )
     cmake_parse_arguments(_ARGUMENTS "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN} )
 
-    set(${OUT} "<array>\n")
+    set(${OUT} "    <array>\n")
 
     if(_ARGUMENTS_ALL OR _ARGUMENTS_PORTRAIT)
-        set(${OUT} "${${OUT}}<string>UIInterfaceOrientationPortrait</string>\n")
+        set(${OUT} "${${OUT}}        <string>UIInterfaceOrientationPortrait</string>\n")
     endif()
     if(_ARGUMENTS_ALL OR _ARGUMENTS_LANDSCAPE_LEFT)
-        set(${OUT} "${${OUT}}<string>UIInterfaceOrientationLandscapeLeft</string>\n")
+        set(${OUT} "${${OUT}}        <string>UIInterfaceOrientationLandscapeLeft</string>\n")
     endif()
     if(_ARGUMENTS_ALL OR _ARGUMENTS_LANDSCAPE_RIGHT)
-        set(${OUT} "${${OUT}}<string>UIInterfaceOrientationLandscapeRight</string>\n")
+        set(${OUT} "${${OUT}}        <string>UIInterfaceOrientationLandscapeRight</string>\n")
     endif()
     if(_ARGUMENTS_ALL OR _ARGUMENTS_UPSIDEDOWN)
-        set(${OUT} "${${OUT}}<string>UIInterfaceOrientationPortraitUpsideDown</string>\n")
+        set(${OUT} "${${OUT}}        <string>UIInterfaceOrientationPortraitUpsideDown</string>\n")
     endif()
 
-    set(${OUT} "${${OUT}}</array>\n")
+    set(${OUT} "${${OUT}}    </array>\n")
 endmacro()
 
 macro(ios_supported_orientations)
@@ -71,17 +71,46 @@ macro(ios_supported_orientations)
         set(result "")
         if(_TARGET_IPHONE)
             ios_build_orientation_entries(_iphone_entries ${_TARGET_IPHONE})
-            set(result "${result}<key>UISupportedInterfaceOrientations</key>\n${_iphone_entries}")
+            set(result "${result}    <key>UISupportedInterfaceOrientations</key>\n${_iphone_entries}")
         endif()
         if(_TARGET_IPAD)
             ios_build_orientation_entries(_ipad_entries ${_TARGET_IPAD})
-            set(result "${result}<key>UISupportedInterfaceOrientations~ipad</key>\n${_ipad_entries}")
+            set(result "${result}    <key>UISupportedInterfaceOrientations~ipad</key>\n${_ipad_entries}")
         endif()
 
         set(IOS_SUPPORTED_INTERFACE_ORIENTATIONS ${result})
     endif()
 endmacro()
 
+macro(ios_uri_handlers)
+    if(BDN_PLATFORM_IOS)
+        set(options)
+        set(oneValueArgs ROLE)
+        set(multiValueArgs HANDLERS)
+        cmake_parse_arguments(_ARGUMENTS "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN} )
+
+        set(result "")
+        if(_ARGUMENTS_HANDLERS)
+            set(result "${result}    <key>CFBundleURLTypes</key>\n")
+            set(result "${result}    <array>\n")
+            set(result "${result}        <dict>\n")
+            set(result "${result}            <key>CFBundleTypeRole</key>\n")
+            set(result "${result}            <string>${_ARGUMENTS_ROLE}</string>\n")
+            set(result "${result}            <key>CFBundleURLName</key>\n")
+            set(result "${result}            <string>${MACOSX_BUNDLE_GUI_IDENTIFIER}</string>\n")
+            set(result "${result}            <key>CFBundleURLSchemes</key>\n")
+            set(result "${result}            <array>\n")
+            string(REPLACE ";" "</string>\n                <string>" _ARGUMENTS_HANDLERS "${_ARGUMENTS_HANDLERS}")
+            set(result "${result}                <string>${_ARGUMENTS_HANDLERS}</string>\n")
+            set(result "${result}            </array>\n")
+            set(result "${result}        </dict>\n")
+            set(result "${result}    </array>\n")
+        endif()
+
+        set(IOS_URI_HANDLERS ${result})
+    endif()
+endmacro()
+
 macro(ios_set_launchboard_file LAUNCHBOARD_NAME)
     SET(MACOSX_BUNDLE_LAUNCH_STORYBOARD ${LAUNCHBOARD_NAME})
 endmacro()
@@ -96,8 +125,8 @@ endmacro()
 macro(ios_configure_app_info)
     if(BDN_PLATFORM_IOS)
         set(options )
-        set(oneValueArgs TARGET LAUNCHSCREEN)
-        set(multiValueArgs TARGETED_DEVICES IPHONE_ORIENTATIONS IPAD_ORIENTATIONS)
+        set(oneValueArgs TARGET LAUNCHSCREEN URI_ROLE)
+        set(multiValueArgs TARGETED_DEVICES IPHONE_ORIENTATIONS IPAD_ORIENTATIONS URI_HANDLERS)
         cmake_parse_arguments(_ARGUMENTS "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN} )
 
         set_xcode_property(${_ARGUMENTS_TARGET} INSTALL_PATH "$(LOCAL_APPS_DIR)")
@@ -110,6 +139,14 @@ macro(ios_configure_app_info)
         endif()
 
         ios_supported_orientations(IPHONE ${_ARGUMENTS_IPHONE_ORIENTATIONS} IPAD ${_ARGUMENTS_IPAD_ORIENTATIONS})
+
+        if(_ARGUMENTS_URI_HANDLERS)
+            if(NOT _ARGUMENTS_URI_ROLE)
+                # Options: Editor / Viewer / None
+                set(_ARGUMENTS_URI_ROLE None)
+            endif()
+            ios_uri_handlers(HANDLERS ${_ARGUMENTS_URI_HANDLERS} ROLE ${_ARGUMENTS_URI_ROLE})
+        endif()
     endif()
 endmacro()
 
diff --git a/cmake/utilities/permissions.cmake b/cmake/utilities/permissions.cmake
index de7a7050..89b52f61 100644
--- a/cmake/utilities/permissions.cmake
+++ b/cmake/utilities/permissions.cmake
@@ -4,18 +4,18 @@ macro(configure_app_permissions)
     cmake_parse_arguments(_permissions "${options}" "" "" ${ARGN} )
 
     if(BDN_PLATFORM_IOS OR BDN_PLATFORM_OSX)
-        set(_transport_security "<key>NSAppTransportSecurity</key><dict>")
+        set(_transport_security "    <key>NSAppTransportSecurity</key>\n    <dict>")
 
         # Allow HTTP
-        string(APPEND _transport_security "<key>NSAllowsArbitraryLoadsInWebContent</key>")
+        string(APPEND _transport_security "        <key>NSAllowsArbitraryLoadsInWebContent</key>")
 
         if(_permissions_ALLOW_HTTP)
-            string(APPEND _transport_security "<true/>")
+            string(APPEND _transport_security "        <true/>")
         else()
-            string(APPEND _transport_security "<false/>")
+            string(APPEND _transport_security "        <false/>")
         endif()
 
-        string(APPEND _transport_security "</dict>")
+        string(APPEND _transport_security "    </dict>\n")
         set(MACOSX_NSAPP_TRANSPORT_SECURITY ${_transport_security})
     elseif(BDN_PLATFORM_ANDROID)
         set(ANDROID_PERMISSIONS "")
diff --git a/framework/foundation/include/bdn/ApplicationController.h b/framework/foundation/include/bdn/ApplicationController.h
index ba024e64..f3c8b7cf 100644
--- a/framework/foundation/include/bdn/ApplicationController.h
+++ b/framework/foundation/include/bdn/ApplicationController.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <bdn/String.h>
 #include <memory>
 
 namespace bdn
@@ -17,5 +18,6 @@ namespace bdn
         virtual void onSuspend() {}
         virtual void onResume() {}
         virtual void onTerminate() {}
+        virtual void onOpenURL(const String &url) {}
     };
 }
diff --git a/framework/ui/platforms/ios/include/bdn/ios/UIApplication.hh b/framework/ui/platforms/ios/include/bdn/ios/UIApplication.hh
index 6d8e4fa2..18948ee8 100644
--- a/framework/ui/platforms/ios/include/bdn/ios/UIApplication.hh
+++ b/framework/ui/platforms/ios/include/bdn/ios/UIApplication.hh
@@ -30,6 +30,7 @@ namespace bdn::ui::ios
         void _applicationDidEnterBackground();
         void _applicationWillEnterForeground();
         void _applicationWillTerminate();
+        bool _applicationOpenURL(NSURL *url);
 
       private:
         void buildCommandlineArguments(int argCount, char *args[]);
diff --git a/framework/ui/platforms/ios/src/UIApplication.mm b/framework/ui/platforms/ios/src/UIApplication.mm
index dd9b7411..fc928990 100644
--- a/framework/ui/platforms/ios/src/UIApplication.mm
+++ b/framework/ui/platforms/ios/src/UIApplication.mm
@@ -78,6 +78,16 @@ - (void)applicationWillTerminate:(UIApplication *)application
     }
 }
 
+- (BOOL)application:(UIApplication *)app
+            openURL:(NSURL *)url
+            options:(NSDictionary<UIApplicationOpenURLOptionsKey, id> *)options
+{
+    if (auto app = self.bdnApplication.lock()) {
+        return app->_applicationOpenURL(url) ? YES : NO;
+    }
+    return NO;
+}
+
 @end
 
 namespace bdn::ui::ios
@@ -188,6 +198,16 @@ - (void)applicationWillTerminate:(UIApplication *)application
         bdn::platformEntryWrapper([&]() { applicationController()->onTerminate(); }, false);
     }
 
+    bool UIApplication::_applicationOpenURL(NSURL *url)
+    {
+        if (!url) {
+            return false;
+        }
+        bdn::String bdnUrl = [url absoluteString].UTF8String;
+        bdn::platformEntryWrapper([&]() { applicationController()->onOpenURL(bdnUrl); }, false);
+        return true;
+    }
+
     void UIApplication::initiateExitIfPossible(int exitCode) {}
 
     void UIApplication::disposeMainDispatcher()