diff --git a/packages/react-native/Libraries/NativeComponent/BaseViewConfig.android.js b/packages/react-native/Libraries/NativeComponent/BaseViewConfig.android.js
index c322077715d..407943c4c9d 100644
--- a/packages/react-native/Libraries/NativeComponent/BaseViewConfig.android.js
+++ b/packages/react-native/Libraries/NativeComponent/BaseViewConfig.android.js
@@ -10,7 +10,6 @@
 
 import type {PartialViewConfigWithoutName} from './PlatformBaseViewConfig';
 
-import * as ReactNativeFeatureFlags from '../../src/private/featureflags/ReactNativeFeatureFlags';
 import ReactNativeStyleAttributes from '../Components/View/ReactNativeStyleAttributes';
 import {DynamicallyInjectedByGestureHandler} from './ViewConfigIgnore';
 
@@ -171,9 +170,7 @@ const validAttributesForNonEventProps = {
     process: require('../StyleSheet/processBackgroundImage').default,
   },
   boxShadow: {
-    process: ReactNativeFeatureFlags.enableNativeCSSParsing()
-      ? undefined
-      : require('../StyleSheet/processBoxShadow').default,
+    process: require('../StyleSheet/processBoxShadow').default,
   },
   filter: {
     process: require('../StyleSheet/processFilter').default,
diff --git a/packages/react-native/Libraries/NativeComponent/BaseViewConfig.ios.js b/packages/react-native/Libraries/NativeComponent/BaseViewConfig.ios.js
index bac309f7cf5..2cd155760db 100644
--- a/packages/react-native/Libraries/NativeComponent/BaseViewConfig.ios.js
+++ b/packages/react-native/Libraries/NativeComponent/BaseViewConfig.ios.js
@@ -10,7 +10,6 @@
 
 import type {PartialViewConfigWithoutName} from './PlatformBaseViewConfig';
 
-import * as ReactNativeFeatureFlags from '../../src/private/featureflags/ReactNativeFeatureFlags';
 import ReactNativeStyleAttributes from '../Components/View/ReactNativeStyleAttributes';
 import {
   ConditionallyIgnoredEventHandlers,
@@ -230,9 +229,7 @@ const validAttributesForNonEventProps = {
     process: require('../StyleSheet/processFilter').default,
   },
   boxShadow: {
-    process: ReactNativeFeatureFlags.enableNativeCSSParsing()
-      ? undefined
-      : require('../StyleSheet/processBoxShadow').default,
+    process: require('../StyleSheet/processBoxShadow').default,
   },
   mixBlendMode: true,
   isolation: true,
diff --git a/packages/react-native/ReactCommon/react/renderer/components/view/BaseViewProps.cpp b/packages/react-native/ReactCommon/react/renderer/components/view/BaseViewProps.cpp
index b4218879c67..28e880f0e37 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/view/BaseViewProps.cpp
+++ b/packages/react-native/ReactCommon/react/renderer/components/view/BaseViewProps.cpp
@@ -10,7 +10,6 @@
 #include <algorithm>
 
 #include <react/featureflags/ReactNativeFeatureFlags.h>
-#include <react/renderer/components/view/BoxShadowPropsConversions.h>
 #include <react/renderer/components/view/conversions.h>
 #include <react/renderer/components/view/primitives.h>
 #include <react/renderer/components/view/propsConversions.h>
diff --git a/packages/react-native/ReactCommon/react/renderer/components/view/BoxShadowPropsConversions.h b/packages/react-native/ReactCommon/react/renderer/components/view/BoxShadowPropsConversions.h
deleted file mode 100644
index 89d07939c08..00000000000
--- a/packages/react-native/ReactCommon/react/renderer/components/view/BoxShadowPropsConversions.h
+++ /dev/null
@@ -1,310 +0,0 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-#pragma once
-
-#include <glog/logging.h>
-#include <react/debug/react_native_expect.h>
-#include <react/featureflags/ReactNativeFeatureFlags.h>
-#include <react/renderer/components/view/primitives.h>
-#include <react/renderer/core/PropsParserContext.h>
-#include <react/renderer/core/RawProps.h>
-#include <react/renderer/core/graphicsConversions.h>
-#include <react/renderer/css/CSSShadow.h>
-#include <react/renderer/css/CSSValueParser.h>
-#include <react/renderer/graphics/BoxShadow.h>
-#include <react/renderer/graphics/PlatformColorParser.h>
-#include <optional>
-#include <string>
-#include <unordered_map>
-
-namespace facebook::react {
-
-inline void parseProcessedBoxShadow(
-    const PropsParserContext& context,
-    const RawValue& value,
-    std::vector<BoxShadow>& result) {
-  react_native_expect(value.hasType<std::vector<RawValue>>());
-  if (!value.hasType<std::vector<RawValue>>()) {
-    result = {};
-    return;
-  }
-
-  std::vector<BoxShadow> boxShadows{};
-  auto rawBoxShadows = static_cast<std::vector<RawValue>>(value);
-  for (const auto& rawBoxShadow : rawBoxShadows) {
-    bool isMap =
-        rawBoxShadow.hasType<std::unordered_map<std::string, RawValue>>();
-    react_native_expect(isMap);
-    if (!isMap) {
-      // If any box shadow is malformed then we should not apply any of them
-      // which is the web behavior.
-      result = {};
-      return;
-    }
-
-    auto rawBoxShadowMap =
-        static_cast<std::unordered_map<std::string, RawValue>>(rawBoxShadow);
-    BoxShadow boxShadow{};
-    auto offsetX = rawBoxShadowMap.find("offsetX");
-    react_native_expect(offsetX != rawBoxShadowMap.end());
-    if (offsetX == rawBoxShadowMap.end()) {
-      result = {};
-      return;
-    }
-    react_native_expect(offsetX->second.hasType<Float>());
-    if (!offsetX->second.hasType<Float>()) {
-      result = {};
-      return;
-    }
-    boxShadow.offsetX = (Float)offsetX->second;
-
-    auto offsetY = rawBoxShadowMap.find("offsetY");
-    react_native_expect(offsetY != rawBoxShadowMap.end());
-    if (offsetY == rawBoxShadowMap.end()) {
-      result = {};
-      return;
-    }
-    react_native_expect(offsetY->second.hasType<Float>());
-    if (!offsetY->second.hasType<Float>()) {
-      result = {};
-      return;
-    }
-    boxShadow.offsetY = (Float)offsetY->second;
-
-    auto blurRadius = rawBoxShadowMap.find("blurRadius");
-    if (blurRadius != rawBoxShadowMap.end()) {
-      react_native_expect(blurRadius->second.hasType<Float>());
-      if (!blurRadius->second.hasType<Float>()) {
-        result = {};
-        return;
-      }
-      boxShadow.blurRadius = (Float)blurRadius->second;
-    }
-
-    auto spreadDistance = rawBoxShadowMap.find("spreadDistance");
-    if (spreadDistance != rawBoxShadowMap.end()) {
-      react_native_expect(spreadDistance->second.hasType<Float>());
-      if (!spreadDistance->second.hasType<Float>()) {
-        result = {};
-        return;
-      }
-      boxShadow.spreadDistance = (Float)spreadDistance->second;
-    }
-
-    auto inset = rawBoxShadowMap.find("inset");
-    if (inset != rawBoxShadowMap.end()) {
-      react_native_expect(inset->second.hasType<bool>());
-      if (!inset->second.hasType<bool>()) {
-        result = {};
-        return;
-      }
-      boxShadow.inset = (bool)inset->second;
-    }
-
-    auto color = rawBoxShadowMap.find("color");
-    if (color != rawBoxShadowMap.end()) {
-      fromRawValue(
-          context.contextContainer,
-          context.surfaceId,
-          color->second,
-          boxShadow.color);
-    }
-
-    boxShadows.push_back(boxShadow);
-  }
-
-  result = boxShadows;
-}
-
-inline SharedColor fromCSSColor(const CSSColor& cssColor) {
-  return hostPlatformColorFromRGBA(
-      cssColor.r, cssColor.g, cssColor.b, cssColor.a);
-}
-
-inline std::optional<BoxShadow> fromCSSShadow(const CSSShadow& cssShadow) {
-  // TODO: handle non-px values
-  if (cssShadow.offsetX.unit != CSSLengthUnit::Px ||
-      cssShadow.offsetY.unit != CSSLengthUnit::Px ||
-      cssShadow.blurRadius.unit != CSSLengthUnit::Px ||
-      cssShadow.spreadDistance.unit != CSSLengthUnit::Px) {
-    return {};
-  }
-
-  return BoxShadow{
-      .offsetX = cssShadow.offsetX.value,
-      .offsetY = cssShadow.offsetY.value,
-      .blurRadius = cssShadow.blurRadius.value,
-      .spreadDistance = cssShadow.spreadDistance.value,
-      .color = fromCSSColor(cssShadow.color),
-  };
-}
-
-inline void parseUnprocessedBoxShadowString(
-    std::string&& value,
-    std::vector<BoxShadow>& result) {
-  auto boxShadowList = parseCSSProperty<CSSShadowList>((std::string)value);
-  if (!std::holds_alternative<CSSShadowList>(boxShadowList)) {
-    result = {};
-    return;
-  }
-
-  for (const auto& cssShadow : std::get<CSSShadowList>(boxShadowList)) {
-    if (auto boxShadow = fromCSSShadow(cssShadow)) {
-      result.push_back(*boxShadow);
-    } else {
-      result = {};
-      return;
-    }
-  }
-}
-
-inline std::optional<Float> coerceLength(const RawValue& value) {
-  if (value.hasType<Float>()) {
-    return (Float)value;
-  }
-
-  if (value.hasType<std::string>()) {
-    auto len = parseCSSProperty<CSSLength>((std::string)value);
-    if (!std::holds_alternative<CSSLength>(len)) {
-      return {};
-    }
-
-    auto cssLen = std::get<CSSLength>(len);
-    if (cssLen.unit != CSSLengthUnit::Px) {
-      return {};
-    }
-
-    return cssLen.value;
-  }
-  return {};
-}
-
-inline std::optional<BoxShadow> parseBoxShadowRawValue(
-    const PropsParserContext& context,
-    const RawValue& value) {
-  if (!value.hasType<std::unordered_map<std::string, RawValue>>()) {
-    return {};
-  }
-
-  auto boxShadow = std::unordered_map<std::string, RawValue>(value);
-  auto rawOffsetX = boxShadow.find("offsetX");
-  if (rawOffsetX == boxShadow.end()) {
-    return {};
-  }
-  auto offsetX = coerceLength(rawOffsetX->second);
-  if (!offsetX.has_value()) {
-    return {};
-  }
-
-  auto rawOffsetY = boxShadow.find("offsetY");
-  if (rawOffsetY == boxShadow.end()) {
-    return {};
-  }
-  auto offsetY = coerceLength(rawOffsetY->second);
-  if (!offsetY.has_value()) {
-    return {};
-  }
-
-  Float blurRadius = 0;
-  auto rawBlurRadius = boxShadow.find("blurRadius");
-  if (rawBlurRadius != boxShadow.end()) {
-    if (auto blurRadiusValue = coerceLength(rawBlurRadius->second)) {
-      blurRadius = *blurRadiusValue;
-    } else {
-      return {};
-    }
-  }
-
-  Float spreadDistance = 0;
-  auto rawSpreadDistance = boxShadow.find("spreadDistance");
-  if (rawSpreadDistance != boxShadow.end()) {
-    if (auto spreadDistanceValue = coerceLength(rawSpreadDistance->second)) {
-      spreadDistance = *spreadDistanceValue;
-    } else {
-      return {};
-    }
-  }
-
-  bool inset = false;
-  auto rawInset = boxShadow.find("inset");
-  if (rawInset != boxShadow.end()) {
-    if (rawInset->second.hasType<bool>()) {
-      inset = (bool)rawInset->second;
-    } else {
-      return {};
-    }
-  }
-
-  SharedColor color;
-  auto rawColor = boxShadow.find("color");
-  if (rawColor != boxShadow.end()) {
-    const auto& rawColorValue = rawColor->second;
-    if (rawColorValue.hasType<std::string>()) {
-      auto cssColor = parseCSSProperty<CSSColor>((std::string)rawColorValue);
-      if (!std::holds_alternative<CSSColor>(cssColor)) {
-        return {};
-      }
-      color = fromCSSColor(std::get<CSSColor>(cssColor));
-    } else {
-      fromRawValue(
-          context.contextContainer, context.surfaceId, rawColor->second, color);
-      if (!color) {
-        return {};
-      }
-    }
-  }
-
-  return BoxShadow{
-      .offsetX = *offsetX,
-      .offsetY = *offsetY,
-      .blurRadius = blurRadius,
-      .spreadDistance = spreadDistance,
-      .color = color,
-      .inset = inset};
-}
-
-inline void parseUnprocessedBoxShadowList(
-    const PropsParserContext& context,
-    std::vector<RawValue>&& value,
-    std::vector<BoxShadow>& result) {
-  for (const auto& rawValue : value) {
-    if (auto boxShadow = parseBoxShadowRawValue(context, rawValue)) {
-      result.push_back(*boxShadow);
-    } else {
-      result = {};
-      return;
-    }
-  }
-}
-
-inline void parseUnprocessedBoxShadow(
-    const PropsParserContext& context,
-    const RawValue& value,
-    std::vector<BoxShadow>& result) {
-  if (value.hasType<std::string>()) {
-    parseUnprocessedBoxShadowString((std::string)value, result);
-  } else if (value.hasType<std::vector<RawValue>>()) {
-    parseUnprocessedBoxShadowList(
-        context, (std::vector<RawValue>)value, result);
-  } else {
-    result = {};
-  }
-}
-
-inline void fromRawValue(
-    const PropsParserContext& context,
-    const RawValue& value,
-    std::vector<BoxShadow>& result) {
-  if (ReactNativeFeatureFlags::enableNativeCSSParsing()) {
-    parseUnprocessedBoxShadow(context, value, result);
-  } else {
-    parseProcessedBoxShadow(context, value, result);
-  }
-}
-
-} // namespace facebook::react
diff --git a/packages/react-native/ReactCommon/react/renderer/components/view/conversions.h b/packages/react-native/ReactCommon/react/renderer/components/view/conversions.h
index f2a03483d83..31f3f587550 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/view/conversions.h
+++ b/packages/react-native/ReactCommon/react/renderer/components/view/conversions.h
@@ -16,6 +16,7 @@
 #include <react/renderer/core/graphicsConversions.h>
 #include <react/renderer/graphics/BackgroundImage.h>
 #include <react/renderer/graphics/BlendMode.h>
+#include <react/renderer/graphics/BoxShadow.h>
 #include <react/renderer/graphics/Filter.h>
 #include <react/renderer/graphics/Isolation.h>
 #include <react/renderer/graphics/LinearGradient.h>
@@ -1052,6 +1053,102 @@ inline void fromRawValue(
   }
 }
 
+inline void fromRawValue(
+    const PropsParserContext& context,
+    const RawValue& value,
+    std::vector<BoxShadow>& result) {
+  react_native_expect(value.hasType<std::vector<RawValue>>());
+  if (!value.hasType<std::vector<RawValue>>()) {
+    result = {};
+    return;
+  }
+
+  std::vector<BoxShadow> boxShadows{};
+  auto rawBoxShadows = static_cast<std::vector<RawValue>>(value);
+  for (const auto& rawBoxShadow : rawBoxShadows) {
+    bool isMap =
+        rawBoxShadow.hasType<std::unordered_map<std::string, RawValue>>();
+    react_native_expect(isMap);
+    if (!isMap) {
+      // If any box shadow is malformed then we should not apply any of them
+      // which is the web behavior.
+      result = {};
+      return;
+    }
+
+    auto rawBoxShadowMap =
+        static_cast<std::unordered_map<std::string, RawValue>>(rawBoxShadow);
+    BoxShadow boxShadow{};
+    auto offsetX = rawBoxShadowMap.find("offsetX");
+    react_native_expect(offsetX != rawBoxShadowMap.end());
+    if (offsetX == rawBoxShadowMap.end()) {
+      result = {};
+      return;
+    }
+    react_native_expect(offsetX->second.hasType<Float>());
+    if (!offsetX->second.hasType<Float>()) {
+      result = {};
+      return;
+    }
+    boxShadow.offsetX = (Float)offsetX->second;
+
+    auto offsetY = rawBoxShadowMap.find("offsetY");
+    react_native_expect(offsetY != rawBoxShadowMap.end());
+    if (offsetY == rawBoxShadowMap.end()) {
+      result = {};
+      return;
+    }
+    react_native_expect(offsetY->second.hasType<Float>());
+    if (!offsetY->second.hasType<Float>()) {
+      result = {};
+      return;
+    }
+    boxShadow.offsetY = (Float)offsetY->second;
+
+    auto blurRadius = rawBoxShadowMap.find("blurRadius");
+    if (blurRadius != rawBoxShadowMap.end()) {
+      react_native_expect(blurRadius->second.hasType<Float>());
+      if (!blurRadius->second.hasType<Float>()) {
+        result = {};
+        return;
+      }
+      boxShadow.blurRadius = (Float)blurRadius->second;
+    }
+
+    auto spreadDistance = rawBoxShadowMap.find("spreadDistance");
+    if (spreadDistance != rawBoxShadowMap.end()) {
+      react_native_expect(spreadDistance->second.hasType<Float>());
+      if (!spreadDistance->second.hasType<Float>()) {
+        result = {};
+        return;
+      }
+      boxShadow.spreadDistance = (Float)spreadDistance->second;
+    }
+
+    auto inset = rawBoxShadowMap.find("inset");
+    if (inset != rawBoxShadowMap.end()) {
+      react_native_expect(inset->second.hasType<bool>());
+      if (!inset->second.hasType<bool>()) {
+        result = {};
+        return;
+      }
+      boxShadow.inset = (bool)inset->second;
+    }
+
+    auto color = rawBoxShadowMap.find("color");
+    if (color != rawBoxShadowMap.end()) {
+      fromRawValue(
+          context.contextContainer,
+          context.surfaceId,
+          color->second,
+          boxShadow.color);
+    }
+
+    boxShadows.push_back(boxShadow);
+  }
+
+  result = boxShadows;
+}
 inline void fromRawValue(
     const PropsParserContext& context,
     const RawValue& value,