diff --git a/client/src/features/editor/components/block/Block.style.ts b/client/src/features/editor/components/block/Block.style.ts
index cb9a8b20..8b884a28 100644
--- a/client/src/features/editor/components/block/Block.style.ts
+++ b/client/src/features/editor/components/block/Block.style.ts
@@ -64,6 +64,8 @@ export const textContainerStyle = cva({
   base: {
     ...baseTextStyle,
     position: "relative",
+    overflowWrap: "break-word",
+    whiteSpace: "pre-wrap",
     "&:empty::before": {
       color: "gray.300",
       pointerEvents: "none",
diff --git a/client/src/features/editor/utils/domSyncUtils.ts b/client/src/features/editor/utils/domSyncUtils.ts
index 2260af65..53a4a4b9 100644
--- a/client/src/features/editor/utils/domSyncUtils.ts
+++ b/client/src/features/editor/utils/domSyncUtils.ts
@@ -139,13 +139,7 @@ const setsEqual = (a: Set<string>, b: Set<string>): boolean => {
 };
 
 const sanitizeText = (text: string): string => {
-  return text
-    .replace(/<br>/g, "&nbsp;")
-    .replace(/&/g, "&amp;")
-    .replace(/</g, "&lt;")
-    .replace(/>/g, "&gt;")
-    .replace(/"/g, "&quot;")
-    .replace(/'/g, "&#039;");
+  return text.replace(/<br>/g, "\u00A0");
 };
 
 // 배열 비교 헬퍼 함수