diff --git a/backend/app/api/v1/endpoints/map.py b/backend/app/api/v1/endpoints/map.py
index 56dce52..5a0465a 100644
--- a/backend/app/api/v1/endpoints/map.py
+++ b/backend/app/api/v1/endpoints/map.py
@@ -62,6 +62,20 @@ async def upload_map(file: UploadFile = File(...), user=Depends(get_current_user
     raise HTTPException(status_code=500, detail=str(e))
 
 
+@router.post("/open")
+async def open_map(file: UploadFile = File(...)):
+  try:
+    content = await file.read()
+    chkt = get_chkt(BytesIO(content))
+    chk = CHK(chkt)
+    dat = DAT()
+
+    raw_map = get_map(chk, dat)
+    return {"file_name": file.filename, "raw_map": raw_map}
+  except Exception as e:
+    raise HTTPException(status_code=500, detail=str(e))
+
+
 @router.get("/test_map")
 async def get_test_map():
   with open("./example/various_units.scx", "rb") as f:
diff --git a/backend/app/services/rawdata/chk.py b/backend/app/services/rawdata/chk.py
index 8aae8b1..2f4de39 100644
--- a/backend/app/services/rawdata/chk.py
+++ b/backend/app/services/rawdata/chk.py
@@ -413,11 +413,14 @@ def sprites(self) -> list[chk_types.Sprite]:
 
   @cached_property
   def strings(self) -> list[chk_types.String]:
-    str_bytes = self.chkt.getsection("STRx")
-    string_count = struct.unpack("I", str_bytes[0:4])[0]
+    str_section = "STRx" if b"STRx" in self.chkt.sections else "STR "
+    size = 2 if str_section == "STR " else 4
+    format = "H" if str_section == "STR " else "I"
+    str_bytes = self.chkt.getsection(str_section)
+    string_count = struct.unpack(format, str_bytes[0:size])[0]
     offsets = [
-      struct.unpack("I", str_bytes[i : i + 4])[0]
-      for i in range(4, 4 + 4 * string_count, 4)
+      struct.unpack(format, str_bytes[i : i + size])[0]
+      for i in range(size, size + size * string_count, size)
     ]
 
     result: list[chk_types.String] = []
diff --git a/backend/example/A_Tale_of_Two_Cities.scx b/backend/example/A_Tale_of_Two_Cities.scx
new file mode 100644
index 0000000..7e84b59
Binary files /dev/null and b/backend/example/A_Tale_of_Two_Cities.scx differ
diff --git a/backend/example/goe.scx b/backend/example/goe.scx
new file mode 100644
index 0000000..ee5edb8
Binary files /dev/null and b/backend/example/goe.scx differ
diff --git a/frontend/components/layout/app-menu.tsx b/frontend/components/layout/app-menu.tsx
index ff4debe..4639bdf 100644
--- a/frontend/components/layout/app-menu.tsx
+++ b/frontend/components/layout/app-menu.tsx
@@ -8,7 +8,9 @@ import {
 } from "../ui/menubar";
 import { useUsemapStore } from "@/components/pages/editor-page";
 import api from "@/lib/api";
+import { UsemapActions } from "@/store/mapStore";
 import { Usemap } from "@/types/schemas/project/Usemap";
+import { useRef } from "react";
 
 async function onClickBuild(usemap: Usemap | null) {
   if (!usemap) return;
@@ -35,8 +37,46 @@ async function onClickBuild(usemap: Usemap | null) {
   }
 }
 
+async function onClickOpenUsemap(
+  file: File,
+  openUsemap: UsemapActions["openUsemap"],
+) {
+  try {
+    openUsemap(file);
+  } catch (error) {
+    console.error("Failed to upload map:", error);
+    alert("Failed to load map file. Please try again.");
+  }
+}
+
+async function onClickSave(usemap: Usemap) {
+  const a = document.createElement("a");
+  const blob = new Blob([JSON.stringify(usemap)], { type: "application/json" });
+  const url = window.URL.createObjectURL(blob);
+  a.download = `${usemap.scenario_property.name.content}.wproject`;
+  a.href = url;
+
+  document.body.appendChild(a);
+  a.click();
+  a.remove();
+  window.URL.revokeObjectURL(url);
+}
+
 export function AppMenu() {
   const rawMap = useUsemapStore((state) => state.usemap);
+  const openUsemap = useUsemapStore((state) => state.openUsemap);
+
+  const usemapInputRef = useRef<HTMLInputElement>(null);
+
+  const handleFileSelect = async (
+    event: React.ChangeEvent<HTMLInputElement>,
+  ) => {
+    const file = event.target.files?.[0];
+    if (file) {
+      await onClickOpenUsemap(file, openUsemap);
+      event.target.value = "";
+    }
+  };
 
   return (
     <Menubar>
@@ -44,12 +84,16 @@ export function AppMenu() {
         <MenubarTrigger>File</MenubarTrigger>
         <MenubarContent>
           <MenubarItem>New Project</MenubarItem>
-          <MenubarItem onClick={() => onClickBuild(rawMap)}>
-            Download
-          </MenubarItem>
           <MenubarSeparator />
-          <MenubarItem>Open</MenubarItem>
+          <MenubarItem onClick={() => usemapInputRef.current?.click()}>
+            Open
+          </MenubarItem>
           <MenubarItem>Open Recents</MenubarItem>
+          <MenubarSeparator />
+          <MenubarItem onClick={() => rawMap && onClickSave(rawMap)}>
+            Save
+          </MenubarItem>
+          <MenubarItem onClick={() => onClickBuild(rawMap)}>Build</MenubarItem>
         </MenubarContent>
       </MenubarMenu>
       <MenubarMenu>
@@ -80,6 +124,14 @@ export function AppMenu() {
           <MenubarItem>Redo</MenubarItem>
         </MenubarContent>
       </MenubarMenu>
+
+      <input
+        ref={usemapInputRef}
+        type="file"
+        accept=".chk,.scx,.scm,.wproject"
+        className="hidden"
+        onChange={handleFileSelect}
+      />
     </Menubar>
   );
 }
diff --git a/frontend/components/ui/menubar.tsx b/frontend/components/ui/menubar.tsx
index 3edf641..22587a4 100644
--- a/frontend/components/ui/menubar.tsx
+++ b/frontend/components/ui/menubar.tsx
@@ -171,6 +171,7 @@ export function MenubarItem({
       </li>
     );
   }
+
   return (
     <li className={twMerge("w-full whitespace-nowrap text-sm", className)}>
       <Button {...props}></Button>
diff --git a/frontend/hooks/useImage.ts b/frontend/hooks/useImage.ts
index dca9115..1089eea 100644
--- a/frontend/hooks/useImage.ts
+++ b/frontend/hooks/useImage.ts
@@ -152,7 +152,9 @@ export function useViewportImage(): ViewportImageBundle {
 
     terrainImage.current = getTerrainImage(
       usemap.terrain,
-      usemap.entities.filter((entity) => entity.data && entity.data.kind === "Tile").map(e => e.data) as Tile[],
+      usemap.entities
+        .filter((entity) => entity.data && entity.data.kind === "Tile")
+        .map((e) => e.data) as Tile[],
       tileGroup,
       tilesetData,
     );
@@ -161,8 +163,12 @@ export function useViewportImage(): ViewportImageBundle {
   const requiredImageIDs = useMemo(() => {
     const result = new Set<number>();
     if (usemap) {
-      const unitEntities = usemap.entities.filter((entity) => entity.data && entity.data.kind === "Unit").map(e => e.data) as Unit[];
-      const spriteEntities = usemap.entities.filter((entity) => entity.data && entity.data.kind === "Sprite").map(e => e.data) as Sprite[];
+      const unitEntities = usemap.entities
+        .filter((entity) => entity.data && entity.data.kind === "Unit")
+        .map((e) => e.data) as Unit[];
+      const spriteEntities = usemap.entities
+        .filter((entity) => entity.data && entity.data.kind === "Sprite")
+        .map((e) => e.data) as Sprite[];
 
       unitEntities.forEach((unit) => {
         result.add(unit.unit_definition.specification.graphics.sprite.image.id);
@@ -183,7 +189,8 @@ export function useViewportImage(): ViewportImageBundle {
       const bmp = await getPlacedUnitImage(
         usemap.terrain,
         usemap.entities
-          .filter((entity) => entity.data && entity.data.kind === "Unit").map(e => e.data) as Unit[],
+          .filter((entity) => entity.data && entity.data.kind === "Unit")
+          .map((e) => e.data) as Unit[],
         imagesData,
       );
       setUnitImage(bmp);
@@ -197,7 +204,8 @@ export function useViewportImage(): ViewportImageBundle {
       const bmp = await getPlacedSpriteImages(
         usemap.terrain,
         usemap.entities
-          .filter((entity) => entity.data && entity.data.kind === "Sprite").map(e => e.data) as Sprite[],
+          .filter((entity) => entity.data && entity.data.kind === "Sprite")
+          .map((e) => e.data) as Sprite[],
         imagesData,
       );
       setSpriteImage(bmp);
@@ -209,7 +217,8 @@ export function useViewportImage(): ViewportImageBundle {
     locationImage.current = getLocationImage(
       usemap.terrain,
       usemap.entities
-        .filter((entity) => entity.data && entity.data.kind === "Location").map(e => e.data) as Location[],
+        .filter((entity) => entity.data && entity.data.kind === "Location")
+        .map((e) => e.data) as Location[],
     );
   }, [usemap?.entities]);
 
diff --git a/frontend/store/mapStore.ts b/frontend/store/mapStore.ts
index 37e8df9..e46c4f3 100644
--- a/frontend/store/mapStore.ts
+++ b/frontend/store/mapStore.ts
@@ -1,7 +1,8 @@
 "use client";
 
-import { Usemap } from "@/types/schemas/project/Usemap";
+import { Usemap, UsemapSchema } from "@/types/schemas/project/Usemap";
 import { createStore } from "zustand";
+import { immer } from "zustand/middleware/immer";
 import { produce } from "immer";
 import { Entity } from "@/types/schemas/entities/Entity";
 import { Asset } from "@/types/asset";
@@ -29,9 +30,11 @@ export type UsemapState = {
 };
 
 export type UsemapActions = {
+  fetchUsemap: (mapName: string) => Promise<void>;
+  setUsemap: (usemap: Usemap) => void;
+  openUsemap: (file: File) => Promise<void>;
   addEntity: (entity: Asset<Entity>) => void;
   deleteEntity: (entity: Asset<Entity>) => void;
-  fetchUsemap: (mapName: string) => Promise<void>;
   updateEntityAssetName: (id: number, name: string) => void;
   updateEntity: (id: number, path: string[], value: any) => void;
   addAsset: (asset: Asset) => void;
@@ -51,66 +54,103 @@ export const createUsemapStore = () => {
     return obj;
   };
 
-  return createStore<UsemapStore>()((set) => ({
-    usemap: null,
-    fetchUsemap: async (mapName: string) => {
-      try {
-        const res = await api.get<Usemap>(`/api/v1/maps/${mapName}`);
-        set({ usemap: res.data });
-      } catch (error) {
-        console.error("Failed to fetch usemap:", error);
-      }
-    },
-    addEntity: (entity: Asset<Entity>) =>
-      set((state) => ({
-        usemap: produce(state.usemap, (draft: Usemap) => {
-          draft.entities.push(entity);
-        }),
-      })),
-    deleteEntity: (entity: Asset<Entity>) =>
-      set((state) => ({
-        usemap: produce(state.usemap, (draft: Usemap) => {
-          draft.entities = draft.entities.filter(
-            (e: Asset<Entity>) => e.id !== entity.id,
-          );
-          // maybe can replaced with delete draft.entities[entity.id]?
-        }),
-      })),
-    updateEntityAssetName: (id: number, name: string) =>
-      set((state) => ({
-        usemap: produce(state.usemap, (draft: Usemap) => {
-          draft.entities = draft.entities.map((e) =>
-            e.id === id ? { ...e, name: name } : e,
-          );
-        }),
-      })),
-    updateEntity: (id: number, path: string[], value: any) =>
-      set((state) => ({
-        usemap: produce(state.usemap, (draft: Usemap) => {
-          draft.entities = draft.entities.map((e) =>
-            e.id === id ? { ...e, data: update(e.data, path, value) } : e,
-          );
-        }),
-      })),
-    addAsset: (asset: Asset) =>
-      set((state) => ({
-        usemap: produce(state.usemap, (draft: Usemap) => {
-          draft.assets.push(asset);
-        }),
-      })),
-    deleteAsset: (asset: Asset) =>
-      set((state) => ({
-        usemap: produce(state.usemap, (draft: Usemap) => {
-          draft.assets = draft.assets.filter((a) => a.id !== asset.id);
-        }),
-      })),
-    updateAsset: (id: number, path: string[], value: any) =>
-      set((state) => ({
-        usemap: produce(state.usemap, (draft: Usemap) => {
-          draft.assets = draft.assets.map((a) =>
-            a.id === id ? { ...a, data: update(a.data, path, value) } : a,
-          );
-        }),
-      })),
-  }));
+  return createStore<UsemapStore>()(
+    immer((set) => ({
+      usemap: null,
+      fetchUsemap: async (mapName: string) => {
+        try {
+          const res = await api.get<Usemap>(`/api/v1/maps/${mapName}`);
+          set({ usemap: res.data });
+        } catch (error) {
+          console.error("Failed to fetch usemap:", error);
+        }
+      },
+      openUsemap: async (file: File) => {
+        try {
+          const extension = file.name.split(".").pop()?.toLowerCase();
+          if (extension === "wproject") {
+            const jsonData = JSON.parse(await file.text());
+
+            // 검증만 하고 원본 데이터 사용
+            const validation = UsemapSchema.safeParse(jsonData);
+            if (!validation.success) {
+              console.warn("Schema validation failed:", validation.error);
+              // 경고만 하고 계속 진행하거나 에러 처리
+            }
+
+            set({ usemap: jsonData }); // 원본 데이터 사용
+          } else if (["chk", "scx", "scm"].includes(extension || "")) {
+            const formData = new FormData();
+            formData.append("file", file);
+
+            const response = await api.post("/api/v1/maps/open/", formData, {
+              headers: {
+                "Content-Type": "multipart/form-data",
+              },
+            });
+
+            const { raw_map } = response.data;
+            if (raw_map) {
+              set({ usemap: raw_map });
+            }
+          }
+        } catch (error) {
+          console.error("Failed to upload usemap:", error);
+          throw error; // 에러를 다시 던져서 컴포넌트에서 처리할 수 있도록
+        }
+      },
+      setUsemap: (usemap: Usemap) => set({ usemap: usemap }),
+      addEntity: (entity: Asset<Entity>) =>
+        set((state) => ({
+          usemap: produce(state.usemap, (draft: Usemap) => {
+            draft.entities.push(entity);
+          }),
+        })),
+      deleteEntity: (entity: Asset<Entity>) =>
+        set((state) => ({
+          usemap: produce(state.usemap, (draft: Usemap) => {
+            draft.entities = draft.entities.filter(
+              (e: Asset<Entity>) => e.id !== entity.id,
+            );
+            // maybe can replaced with delete draft.entities[entity.id]?
+          }),
+        })),
+      updateEntityAssetName: (id: number, name: string) =>
+        set((state) => ({
+          usemap: produce(state.usemap, (draft: Usemap) => {
+            draft.entities = draft.entities.map((e) =>
+              e.id === id ? { ...e, name: name } : e,
+            );
+          }),
+        })),
+      updateEntity: (id: number, path: string[], value: any) =>
+        set((state) => ({
+          usemap: produce(state.usemap, (draft: Usemap) => {
+            draft.entities = draft.entities.map((e) =>
+              e.id === id ? { ...e, data: update(e.data, path, value) } : e,
+            );
+          }),
+        })),
+      addAsset: (asset: Asset) =>
+        set((state) => ({
+          usemap: produce(state.usemap, (draft: Usemap) => {
+            draft.assets.push(asset);
+          }),
+        })),
+      deleteAsset: (asset: Asset) =>
+        set((state) => ({
+          usemap: produce(state.usemap, (draft: Usemap) => {
+            draft.assets = draft.assets.filter((a) => a.id !== asset.id);
+          }),
+        })),
+      updateAsset: (id: number, path: string[], value: any) =>
+        set((state) => ({
+          usemap: produce(state.usemap, (draft: Usemap) => {
+            draft.assets = draft.assets.map((a) =>
+              a.id === id ? { ...a, data: update(a.data, path, value) } : a,
+            );
+          }),
+        })),
+    })),
+  );
 };
diff --git a/frontend/store/projectStore.ts b/frontend/store/projectStore.ts
new file mode 100644
index 0000000..c95a5ba
--- /dev/null
+++ b/frontend/store/projectStore.ts
@@ -0,0 +1,39 @@
+import { Project, ProjectSchema } from "@/types/schemas/project/Project";
+import { create } from "zustand";
+
+export interface ProjectState {
+  project: Project | null;
+}
+
+export interface ProjectActions {
+  /**
+   * Open Webditor Project from .wproject extension file.
+   * @param file Webditor Project File (.wproject)
+   * @returns Open Result
+   */
+  openProject: (file: File) => Promise<boolean>;
+  /**
+   * Set project state from passed project object.
+   * @param project
+   */
+  setProject: (project: Project) => void;
+}
+
+export type ProjectStore = ProjectState & ProjectActions;
+
+export const useProjectStore = create<ProjectStore>()((set) => ({
+  project: null,
+  openProject: async (file: File) => {
+    try {
+      const parseResult = ProjectSchema.parse(
+        JSON.stringify(await file.text()),
+      );
+      set({ project: parseResult });
+      return true;
+    } catch (err) {
+      alert(`Failed to open project ${file.name}: ${err}`);
+      return false;
+    }
+  },
+  setProject: (project: Project) => set({ project: project }),
+}));