diff --git a/package-lock.json b/package-lock.json
index 501caab..d9f5392 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,11 +8,13 @@
       "name": "hammer",
       "version": "0.0.0",
       "dependencies": {
+        "pako": "^2.1.0",
         "react": "^19.1.0",
         "react-dom": "^19.1.0"
       },
       "devDependencies": {
         "@eslint/js": "^9.30.1",
+        "@types/pako": "^2.0.3",
         "@types/react": "^19.1.8",
         "@types/react-dom": "^19.1.6",
         "@vitejs/plugin-react": "^4.6.0",
@@ -1406,6 +1408,13 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/pako": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/@types/pako/-/pako-2.0.3.tgz",
+      "integrity": "sha512-bq0hMV9opAcrmE0Byyo0fY3Ew4tgOevJmQ9grUhpXQhYfyLJ1Kqg3P33JT5fdbT2AjeAjR51zqqVjAL/HMkx7Q==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/react": {
       "version": "19.1.9",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.1.9.tgz",
@@ -2745,6 +2754,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/pako": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/pako/-/pako-2.1.0.tgz",
+      "integrity": "sha512-w+eufiZ1WuJYgPXbV/PO3NCMEc3xqylkKHzp8bxp1uW4qaSNQUkwmLLEc3kKsfz8lpV1F8Ht3U1Cm+9Srog2ug==",
+      "license": "(MIT AND Zlib)"
+    },
     "node_modules/parent-module": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/parent-module/-/parent-module-1.0.1.tgz",
diff --git a/package.json b/package.json
index b2460c8..f93de01 100644
--- a/package.json
+++ b/package.json
@@ -10,11 +10,13 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "pako": "^2.1.0",
     "react": "^19.1.0",
     "react-dom": "^19.1.0"
   },
   "devDependencies": {
     "@eslint/js": "^9.30.1",
+    "@types/pako": "^2.0.3",
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
     "@vitejs/plugin-react": "^4.6.0",
diff --git a/src/App.tsx b/src/App.tsx
index bf4ef12..384762c 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,5 +1,6 @@
 import { useEffect, useRef } from "react"
 import { Hammer } from "./classes/Hammer";
+import pako from "pako";
 
 function App() {
 
@@ -57,17 +58,20 @@ function App() {
                 };
                 try {
                     let reader = new FileReader();
-                    reader.readAsText(files[0], "UTF-8");
+                    reader.readAsArrayBuffer(files[0]);
                     reader.onload = (evt) => {
                         if (evt.target) {
-                            const data = JSON.parse(evt.target.result as string);
+                            // @ts-expect-error
+                            const uncompressed_data = pako.inflate(evt.target.result, {to: "string"});
+                            console.log(uncompressed_data)
+                            const data = JSON.parse(uncompressed_data as string);
                             if (hammerRef.current) {
                                 const tl = new Image();
                                 tl.src = data.tilesheet;
                                 tl.onload = () => {
                                     if (hammerRef.current) {
                                         hammerRef.current.setTileSheet(tl);
-                                        hammerRef.current.tileMap = data.map;
+                                        hammerRef.current.heditor.tileMap = data.map;
                                     }
                                 };
 
diff --git a/src/classes/Hammer.ts b/src/classes/Hammer.ts
index 5c8a402..ed9e439 100644
--- a/src/classes/Hammer.ts
+++ b/src/classes/Hammer.ts
@@ -7,7 +7,7 @@ import { EventsManager } from "./EventManager";
 import { HammerConsole } from "./HammerConsole";
 import { HammerLoader } from "./HammerLoader";
 import { Tile } from "./Tile";
-
+import pako from "pako";
 
 export class Hammer {
     canvas: HTMLCanvasElement | null = null;
@@ -72,7 +72,8 @@ export class Hammer {
         if (this.tilesheet == null) return this.hconsole.push("Tilesheet not exist !", "ERROR");
         const tilesheet_string = ImageToString(this.tilesheet);
         if (tilesheet_string)
-            DownloadTextFile(JSON.stringify({ tilesheet: tilesheet_string, map: this.heditor.tileMap }), "my_map.tmpx");
+            // @ts-expect-error
+            DownloadTextFile(pako.deflate(JSON.stringify({ tilesheet: tilesheet_string, map: this.heditor.tileMap })), "my_map.tmpx");
         else
             return this.hconsole.push("An error has occurred !", "ERROR");
     }
@@ -120,8 +121,6 @@ export class Hammer {
     }
 
     async setTileSheet(img: HTMLImageElement) {
-        // ? Save le tilesheet
-        this.tilesheet = img;
 
         // ? desactiver le bouton pour add des ts
         if (this.helements.elements.button_set_tilesheet)
@@ -132,6 +131,9 @@ export class Hammer {
         // ? Reset l'ancien ts
         this.resetTiles();
 
+        // ? Save le tilesheet
+        this.tilesheet = img;
+
         // ? Recup le nombre
         const tilesMax = Math.floor(img.width / 16) * Math.floor(img.height / 16);
         this.hloader.loadingMax = tilesMax;