diff --git a/controllers/application/chatRooms/chatRoomController.js b/controllers/application/chatRooms/chatRoomController.js
index 0b55296..e6587fa 100644
--- a/controllers/application/chatRooms/chatRoomController.js
+++ b/controllers/application/chatRooms/chatRoomController.js
@@ -7,6 +7,13 @@ const ChatRoomModel = require('../../../models/ChatRoomModel')
 const ChatRoomMessageModel = require('../../../models/ChatRoomMessageModel')
 const UserModel = require('../../../models/UserModel')
 const { ProvinceModel, CityModel } = require('../../../models/StateCity')
+const { optimizeImageFile } = require('../../../utils/imageOptimize')
+let optimizeVideoFaststart = async () => {}
+try {
+  ({ optimizeVideoFaststart } = require('../../../utils/postVideoProcessing'))
+} catch (error) {
+  console.warn('[chatRoomController] postVideoProcessing unavailable:', error.message)
+}
 const {
   slugifyTitle,
   userCanSeeRoom,
@@ -227,6 +234,7 @@ const createRoom = async (req, res, next) => {
       const uniqueFileName = `${Date.now()}-${crypto.randomUUID()}${path.extname(imageFile.name || '')}`
       const filePath = path.join(uploadDir, uniqueFileName)
       await fs.move(imageFile.path, filePath)
+      await optimizeImageFile(filePath, { maxDimension: 800 })
       imagePath = `/chat-rooms/${uniqueFileName}`
     }
 
@@ -397,6 +405,13 @@ const sendRoomMessage = async (req, res, next) => {
       const uniqueFileName = `${Date.now()}-${crypto.randomUUID()}${path.extname(uploaded.name || '')}`
       const filePath = path.join(uploadDir, uniqueFileName)
       await fs.move(uploaded.path, filePath)
+      if (resolvedFileType === 'image' || (uploaded.type || '').startsWith('image/')) {
+        await optimizeImageFile(filePath)
+      } else if (resolvedFileType === 'video' || (uploaded.type || '').startsWith('video/')) {
+        optimizeVideoFaststart(filePath).catch((err) => {
+          console.error('[chatRoomController] video optimize background error:', err.message)
+        })
+      }
       fileUrl = `/chat-rooms/messages/${uniqueFileName}`
     }
 
diff --git a/controllers/application/posts/postController.js b/controllers/application/posts/postController.js
index 6fa3e95..1be3e25 100644
--- a/controllers/application/posts/postController.js
+++ b/controllers/application/posts/postController.js
@@ -30,6 +30,7 @@ try {
 } catch (error) {
   console.warn('[postController] postVideoProcessing unavailable:', error.message)
 }
+const { optimizeImageFile } = require('../../../utils/imageOptimize')
 
 const createPostValidationRules = () => {
   return [
@@ -89,6 +90,14 @@ const createPost = async (req, res) => {
         ? maskPhoneNumbers(String(caption).trim().slice(0, 2000))
         : null
 
+    // کوچک/فشرده‌کردنِ عکس‌ها قبل از ذخیره — قبل از اینکه مسیرشون توی دیتابیس بره، چون
+    // مسیر (file.path) دست‌نخورده می‌ماند، فقط بایت‌های خودِ فایل جایگزین می‌شوند
+    await Promise.all(
+      files
+        .filter((file) => (file.mimetype || file.type || '').startsWith('image/'))
+        .map((file) => optimizeImageFile(file.path))
+    )
+
     const filePaths = files.map((file) => ({
       path: file.path,
       type: (file.mimetype || file.type || '').startsWith('video/') ? 'video' : 'image'
diff --git a/controllers/application/shop-chat/shopChatController.js b/controllers/application/shop-chat/shopChatController.js
index 69fa173..7b9d158 100644
--- a/controllers/application/shop-chat/shopChatController.js
+++ b/controllers/application/shop-chat/shopChatController.js
@@ -6,6 +6,13 @@ const crypto = require('crypto')
 const ShopModel = require('../../../models/ShopModel')
 const ShopChatMessageModel = require('../../../models/ShopChatMessageModel')
 const UserModel = require('../../../models/UserModel')
+const { optimizeImageFile } = require('../../../utils/imageOptimize')
+let optimizeVideoFaststart = async () => {}
+try {
+  ({ optimizeVideoFaststart } = require('../../../utils/postVideoProcessing'))
+} catch (error) {
+  console.warn('[shopChatController] postVideoProcessing unavailable:', error.message)
+}
 
 function chatError (res, status, message) {
   return res.status(status).json({ error: true, message })
@@ -235,6 +242,13 @@ const sendShopChatFileMessage = async (req, res, next) => {
     const uniqueFileName = `${Date.now()}-${crypto.randomUUID()}${path.extname(file.name || '')}`
     const filePath = path.join(uploadDir, uniqueFileName)
     await fs.move(file.path, filePath, { overwrite: true })
+    if (fileType === 'image') {
+      await optimizeImageFile(filePath)
+    } else if (fileType === 'video') {
+      optimizeVideoFaststart(filePath).catch((err) => {
+        console.error('[shopChatController] video optimize background error:', err.message)
+      })
+    }
     const fileUrl = `/shop-chat/${uniqueFileName}`
 
     const message = await ShopChatMessageModel.create({
diff --git a/controllers/application/shop-products/shopProductController.js b/controllers/application/shop-products/shopProductController.js
index e012796..aac6dee 100644
--- a/controllers/application/shop-products/shopProductController.js
+++ b/controllers/application/shop-products/shopProductController.js
@@ -19,6 +19,7 @@ const { enrichMessage, emitChatEvents } = require('../../../helpers/chatHelpers'
 const { viewerIsBlockedBy } = require('../../../utils/blockVisibility')
 const ShopCategoryModel = require('../../../models/ShopCategoryModel')
 const { buildUnifiedInterestScore } = require('../../../utils/exploreAlgorithm')
+const { optimizeImageFile } = require('../../../utils/imageOptimize')
 
 /** Best-effort JWT decode for public browsing endpoints — never throws, never blocks guests. */
 function getOptionalUserId (req) {
@@ -42,6 +43,9 @@ async function saveFile (file, folder, prefix) {
   const uniqueFileName = `${prefix}-${Date.now()}${Math.random().toString().slice(2, 9)}${path.extname(file.name)}`
   const filePath = path.join(uploadDir, uniqueFileName)
   await fs.move(file.path, filePath, { overwrite: true })
+  if ((file.mimetype || file.type || '').startsWith('image/')) {
+    await optimizeImageFile(filePath)
+  }
   return `/${folder}/${uniqueFileName}`
 }
 
diff --git a/controllers/application/shops/shopController.js b/controllers/application/shops/shopController.js
index d6bfe1e..08df933 100644
--- a/controllers/application/shops/shopController.js
+++ b/controllers/application/shops/shopController.js
@@ -8,6 +8,7 @@ const ShopRatingModel = require('../../../models/ShopRatingModel')
 const ShopFollowModel = require('../../../models/ShopFollowModel')
 const OrderModel = require('../../../models/OrderModel')
 const { maskPhoneNumbers } = require('../../../utils/phoneNumberMasking')
+const { optimizeImageFile } = require('../../../utils/imageOptimize')
 
 const MS_DAY = 24 * 60 * 60 * 1000
 const ANALYTICS_RANGE_DAYS = { '7d': 7, '30d': 30, '90d': 90, all: null }
@@ -286,6 +287,7 @@ const updateShopLogo = async (req, res, next) => {
     const uniqueFileName = `${shop._id}-${Date.now()}${path.extname(logo.name)}`
     const filePath = path.join(uploadDir, uniqueFileName)
     await fs.move(logo.path, filePath, { overwrite: true })
+    await optimizeImageFile(filePath, { maxDimension: 800 })
 
     shop.logo = `/shops/${uniqueFileName}`
     await shop.save()
diff --git a/controllers/application/stories/storyController.js b/controllers/application/stories/storyController.js
index 7d6bb9b..cb2e5ea 100644
--- a/controllers/application/stories/storyController.js
+++ b/controllers/application/stories/storyController.js
@@ -13,6 +13,17 @@ const { filterStoryUserIdsByPrivateProfile } = require('../../../utils/privatePr
 const { sendStoryReactionMessage } = require('../../../utils/storyChatMessage')
 const { enrichMessage, emitChatEvents } = require('../../../helpers/chatHelpers')
 const { resolveLinkedEntity } = require('../../../utils/resolveLinkedEntity')
+const { optimizeImageFile } = require('../../../utils/imageOptimize')
+let optimizeVideoFaststart = async () => {}
+try {
+  ({ optimizeVideoFaststart } = require('../../../utils/postVideoProcessing'))
+} catch (error) {
+  console.warn('[storyController] postVideoProcessing unavailable:', error.message)
+}
+
+// استوری روی صفحه‌ی کامل موبایل دیده می‌شه، ولی پهنا/ارتفاعِ خامِ دوربین (اغلب بیشتر از
+// عرضِ صفحه‌ست) لازم نیست دست‌نخورده بمونه
+const STORY_MAX_DIMENSION = 1440
 const { STORY_PHOTO_FILTER_NAMES, applyStoryPhotoFilter } = require('../../../utils/storyPhotoFilters')
 
 const LINK_OVERLAY_KINDS = ['pkg', 'project', 'billboard', 'shop', 'shopproduct', 'booking']
@@ -212,6 +223,13 @@ const createStoryBase64 = async (req, res) => {
     const filename = `${Date.now()}-${userId}${ext}`
     const filePath = path.join(storyStorageDir, filename)
     await fs.promises.writeFile(filePath, buffer)
+    if (mediaType === 'image') {
+      await optimizeImageFile(filePath, { maxDimension: STORY_MAX_DIMENSION })
+    } else {
+      optimizeVideoFaststart(filePath).catch((err) => {
+        console.error('[storyController] video optimize background error:', err.message)
+      })
+    }
 
     const story = await StoryModel.create({
       user_id: userId,
@@ -243,6 +261,13 @@ const createStoryMultipart = async (req, res) => {
     }
 
     const mediaType = (file.mimetype || '').startsWith('video/') ? 'video' : 'image'
+    if (mediaType === 'image') {
+      await optimizeImageFile(file.path, { maxDimension: STORY_MAX_DIMENSION })
+    } else {
+      optimizeVideoFaststart(file.path).catch((err) => {
+        console.error('[storyController] video optimize background error:', err.message)
+      })
+    }
 
     let overlays = []
     try {
diff --git a/controllers/application/verify/setProfileImageController.js b/controllers/application/verify/setProfileImageController.js
index 365da48..0f55692 100644
--- a/controllers/application/verify/setProfileImageController.js
+++ b/controllers/application/verify/setProfileImageController.js
@@ -3,6 +3,11 @@ const fs = require('fs-extra')
 const path = require('path')
 const UserModel = require('../../../models/UserModel')
 const jwt = require('jsonwebtoken')
+const { optimizeImageFile } = require('../../../utils/imageOptimize')
+
+// آواتار هیچ‌وقت بزرگ‌تر از این نمایش داده نمی‌شود — عکسِ خامِ دوربین (چند مگابایت) رو
+// برای یه دایره‌ی کوچیک نگه‌داشتن فقط مصرفِ اینترنت رو بالا می‌بره
+const AVATAR_MAX_DIMENSION = 800
 
 const setProfileImage = async (req, res, next) => {
   try {
@@ -34,6 +39,7 @@ const setProfileImage = async (req, res, next) => {
     const filePath = path.join(uploadDir, uniqueFileName)
 
     await fs.move(profile_image.path, filePath)
+    await optimizeImageFile(filePath, { maxDimension: AVATAR_MAX_DIMENSION })
     // ذخیره مسیر فایل در دیتابیس
     user.profile_image = `/profiles/${uniqueFileName}`
     await user.save()
@@ -81,6 +87,7 @@ const updateProfileImage = async (req, res, next) => {
     const filePath = path.join(uploadDir, uniqueFileName)
 
     await fs.move(profile_image.path, filePath)
+    await optimizeImageFile(filePath, { maxDimension: AVATAR_MAX_DIMENSION })
 
     user.profile_image = `/profiles/${uniqueFileName}`
     await user.save()
diff --git a/index.js b/index.js
index 1767143..ad33434 100644
--- a/index.js
+++ b/index.js
@@ -1,8 +1,16 @@
 require('dotenv').config();
 const express = require('express');
 const app = express();
+const compression = require('compression');
 const path = require('path');
 const crypto = require('crypto');
+const { optimizeImageFile } = require('./utils/imageOptimize');
+let optimizeVideoFaststart = async () => {};
+try {
+  ({ optimizeVideoFaststart } = require('./utils/postVideoProcessing'));
+} catch (error) {
+  console.warn('[index] postVideoProcessing unavailable:', error.message);
+}
 const http = require('http').createServer(app);
 const cors = require('cors');
 const jwt = require('jsonwebtoken');
@@ -106,30 +114,41 @@ const io = require('socket.io')(http, {
 
 app.set('io', io);
 
+// gzip/brotli فقط برای پاسخ‌های متنی (JSON فید/اکسپلور/چت) — فیلترِ پیش‌فرضِ compression
+// خودش مدیا (image/*، video/*) رو compressible نمی‌دونه و رد می‌کنه، پس نیازی به فیلترِ
+// دستی نیست؛ فقط باید قبل از هر res.json/res.send دیگه‌ای بیاد
+app.use(compression());
+
 // افزایش limit برای Base64 (1000mb کافیه)
 app.use(express.json({ limit: '1000mb' }));
 app.use(express.urlencoded({ limit: '1000mb', extended: true }));
 
+// کش طولانی برای مدیا — بدون این، مرورگر/اپ هر بار همون عکس/ویدیوی قبلی رو دوباره
+// دانلود می‌کرد. immutable نمی‌ذاریم چون مسیر آپلود تازه (optimizeImageFile/
+// optimizeVideoFaststart) گاهی چند ثانیه بعدِ همون ریسپانس، بایت‌های همون فایل رو در جا
+// عوض می‌کنه؛ بدونِ immutable مرورگر با ETag/Last-Modified همچنان رواعتبارسنجی می‌کنه
+const STATIC_MEDIA_OPTIONS = { maxAge: '365d' };
+
 // مسیرهای مشخص قبل از /storage عمومی — پروفایل از هر دو محل (قدیم و جدید) سرو می‌شود
-app.use('/storage/profiles', express.static(path.join(__dirname, '../storage/profiles')));
-app.use('/storage/profiles', express.static(path.join(__dirname, 'storage/profiles')));
-app.use('/storage/carts', express.static(path.join(__dirname, '../storage/carts')));
-app.use('/storage/carts', express.static(path.join(__dirname, 'storage/carts')));
-app.use('/storage/posts', express.static(path.join(__dirname, 'storage/posts')));
-app.use('/storage/posts', express.static(path.join(__dirname, '../storage/posts')));
-app.use('/storage/messages', express.static(path.join(__dirname, '../storage/messages')));
-app.use('/storage/messages', express.static(path.join(__dirname, 'storage/messages')));
-app.use('/storage/shop-chat', express.static(path.join(__dirname, '../storage/shop-chat')));
-app.use('/storage/shop-chat', express.static(path.join(__dirname, 'storage/shop-chat')));
-app.use('/storage/chat-rooms', express.static(path.join(__dirname, '../storage/chat-rooms')));
-app.use('/storage/chat-rooms', express.static(path.join(__dirname, 'storage/chat-rooms')));
-app.use('/storage/tickets', express.static(path.join(__dirname, '../storage/tickets')));
-app.use('/storage/tickets', express.static(path.join(__dirname, 'storage/tickets')));
-app.use('/storage/advertising', express.static(path.join(__dirname, '../storage/advertising')));
-app.use('/storage/advertising', express.static(path.join(__dirname, 'storage/advertising')));
-app.use('/storage/services', express.static(path.join(__dirname, '../storage/services')));
-app.use('/storage/services', express.static(path.join(__dirname, 'storage/services')));
-app.use('/storage', express.static(path.join(__dirname, 'storage')));
+app.use('/storage/profiles', express.static(path.join(__dirname, '../storage/profiles'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/profiles', express.static(path.join(__dirname, 'storage/profiles'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/carts', express.static(path.join(__dirname, '../storage/carts'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/carts', express.static(path.join(__dirname, 'storage/carts'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/posts', express.static(path.join(__dirname, 'storage/posts'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/posts', express.static(path.join(__dirname, '../storage/posts'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/messages', express.static(path.join(__dirname, '../storage/messages'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/messages', express.static(path.join(__dirname, 'storage/messages'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/shop-chat', express.static(path.join(__dirname, '../storage/shop-chat'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/shop-chat', express.static(path.join(__dirname, 'storage/shop-chat'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/chat-rooms', express.static(path.join(__dirname, '../storage/chat-rooms'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/chat-rooms', express.static(path.join(__dirname, 'storage/chat-rooms'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/tickets', express.static(path.join(__dirname, '../storage/tickets'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/tickets', express.static(path.join(__dirname, 'storage/tickets'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/advertising', express.static(path.join(__dirname, '../storage/advertising'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/advertising', express.static(path.join(__dirname, 'storage/advertising'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/services', express.static(path.join(__dirname, '../storage/services'), STATIC_MEDIA_OPTIONS));
+app.use('/storage/services', express.static(path.join(__dirname, 'storage/services'), STATIC_MEDIA_OPTIONS));
+app.use('/storage', express.static(path.join(__dirname, 'storage'), STATIC_MEDIA_OPTIONS));
 
 require('./boot');
 
@@ -394,6 +413,13 @@ app.post('/api/v1/chat/file', [blockCheck, chatPeerBlock], async (req, res) => {
       const uniqueFileName = `${Date.now()}-${crypto.randomUUID()}${path.extname(file.name || '')}`
       const filePath = path.join(uploadDir, uniqueFileName)
       await fs.move(file.path, filePath)
+      if (resolvedFileType === 'image' || (file.type || '').startsWith('image/')) {
+        await optimizeImageFile(filePath)
+      } else if (resolvedFileType === 'video' || (file.type || '').startsWith('video/')) {
+        optimizeVideoFaststart(filePath).catch((err) => {
+          console.error('[chat/file] video optimize background error:', err.message)
+        })
+      }
       fileUrl = `/messages/${uniqueFileName}`
     }
 
diff --git a/package-lock.json b/package-lock.json
index 015d12f..9aac1ab 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,6 +12,7 @@
                 "axios": "^1.6.7",
                 "bcryptjs": "^2.4.3",
                 "body-parser": "^1.20.2",
+                "compression": "^1.8.2",
                 "connect-redis": "^10.0.0",
                 "cors": "^2.8.5",
                 "dotenv": "^16.4.5",
@@ -2569,6 +2570,74 @@
             "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==",
             "dev": true
         },
+        "node_modules/compressible": {
+            "version": "2.0.18",
+            "resolved": "https://mirror-npm.runflare.com/compressible/-/compressible-2.0.18.tgz",
+            "integrity": "sha512-AF3r7P5dWxL8MxyITRMlORQNaOA2IkAFaTr4k7BUumjPtRpGDTZpl0Pb1XCO6JeDCBdp126Cgs9sMxqSjgYyRg==",
+            "license": "MIT",
+            "dependencies": {
+                "mime-db": ">= 1.43.0 < 2"
+            },
+            "engines": {
+                "node": ">= 0.6"
+            }
+        },
+        "node_modules/compression": {
+            "version": "1.8.2",
+            "resolved": "https://mirror-npm.runflare.com/compression/-/compression-1.8.2.tgz",
+            "integrity": "sha512-o8vI5RE5A6EVVOd9o41jKp41aJom+QTEO/Bx8MYNjexMo/Bv2WOjUfZr+aL0WnYSgymUy6zeguqLTsIhV0gMvQ==",
+            "license": "MIT",
+            "dependencies": {
+                "bytes": "3.1.2",
+                "compressible": "~2.0.18",
+                "debug": "2.6.9",
+                "destroy": "1.2.0",
+                "negotiator": "~0.6.4",
+                "on-headers": "~1.1.0",
+                "safe-buffer": "5.2.1",
+                "vary": "~1.1.2"
+            },
+            "engines": {
+                "node": ">= 0.8.0"
+            },
+            "funding": {
+                "type": "opencollective",
+                "url": "https://opencollective.com/express"
+            }
+        },
+        "node_modules/compression/node_modules/debug": {
+            "version": "2.6.9",
+            "resolved": "https://mirror-npm.runflare.com/debug/-/debug-2.6.9.tgz",
+            "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+            "license": "MIT",
+            "dependencies": {
+                "ms": "2.0.0"
+            }
+        },
+        "node_modules/compression/node_modules/ms": {
+            "version": "2.0.0",
+            "resolved": "https://mirror-npm.runflare.com/ms/-/ms-2.0.0.tgz",
+            "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A==",
+            "license": "MIT"
+        },
+        "node_modules/compression/node_modules/negotiator": {
+            "version": "0.6.4",
+            "resolved": "https://mirror-npm.runflare.com/negotiator/-/negotiator-0.6.4.tgz",
+            "integrity": "sha512-myRT3DiWPHqho5PrJaIRyaMv2kgYf0mUVgBNOYMuCH5Ki1yEiQaf/ZJuQ62nvpc44wL5WDbTX7yGJi1Neevw8w==",
+            "license": "MIT",
+            "engines": {
+                "node": ">= 0.6"
+            }
+        },
+        "node_modules/compression/node_modules/on-headers": {
+            "version": "1.1.0",
+            "resolved": "https://mirror-npm.runflare.com/on-headers/-/on-headers-1.1.0.tgz",
+            "integrity": "sha512-737ZY3yNnXy37FHkQxPzt4UZ2UWPWiCZWLvFZ4fu5cueciegX0zGPnrlY6bwRg4FdQOe9YU8MkmJwGhoMybl8A==",
+            "license": "MIT",
+            "engines": {
+                "node": ">= 0.8"
+            }
+        },
         "node_modules/concat-map": {
             "version": "0.0.1",
             "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
diff --git a/package.json b/package.json
index a90c028..c3e267f 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
         "axios": "^1.6.7",
         "bcryptjs": "^2.4.3",
         "body-parser": "^1.20.2",
+        "compression": "^1.8.2",
         "connect-redis": "^10.0.0",
         "cors": "^2.8.5",
         "dotenv": "^16.4.5",
diff --git a/utils/downloadRemoteImage.js b/utils/downloadRemoteImage.js
index 90455ad..297c45e 100644
--- a/utils/downloadRemoteImage.js
+++ b/utils/downloadRemoteImage.js
@@ -1,6 +1,7 @@
 const fs = require('fs-extra')
 const path = require('path')
 const axios = require('axios')
+const { optimizeImageFile } = require('./imageOptimize')
 
 const EXT_BY_CONTENT_TYPE = {
   'image/png': '.png',
@@ -32,6 +33,7 @@ async function downloadImageToProfiles(url, baseName) {
   const filePath = path.join(uploadDir, uniqueFileName)
 
   await fs.writeFile(filePath, Buffer.from(response.data))
+  await optimizeImageFile(filePath, { maxDimension: 800 })
 
   return `/profiles/${uniqueFileName}`
 }
diff --git a/utils/imageOptimize.js b/utils/imageOptimize.js
new file mode 100644
index 0000000..524e9ba
--- /dev/null
+++ b/utils/imageOptimize.js
@@ -0,0 +1,59 @@
+const sharp = require('sharp')
+const fs = require('fs-extra')
+const path = require('path')
+
+// اندازه/کیفیتِ نمایش — نه سایزِ چاپ؛ کاربر روی موبایل/وب حداکثر تا این عرض می‌بینه،
+// پس آپلودِ خامِ دوربین (معمولاً ۳۰۰۰-۴۰۰۰ پیکسل) فقط مصرفِ اینترنت رو چند برابر می‌کنه
+// بدون هیچ بهبودِ بصری. این مقادیر برای محتوای پست/استوری تنظیم شده‌اند.
+const DEFAULT_MAX_DIMENSION = 1600
+const DEFAULT_JPEG_QUALITY = 82
+
+/**
+ * تصویرِ رویِ دیسک را (در صورت لازم) کوچک و فشرده می‌کند — همون فایل با همون
+ * پسوند/فرمت بازنویسی می‌شود تا Content-Type و مسیرهای ذخیره‌شده در دیتابیس تغییر نکنند.
+ * اگر فایلِ فشرده‌شده کوچک‌تر نبود (مثلاً عکسِ کوچک/از قبل فشرده)، فایلِ اصلی نگه داشته می‌شود.
+ */
+async function optimizeImageFile(filePath, { maxDimension = DEFAULT_MAX_DIMENSION, jpegQuality = DEFAULT_JPEG_QUALITY } = {}) {
+  if (!filePath) return
+  let tempPath = null
+  try {
+    if (!(await fs.pathExists(filePath))) return
+
+    const ext = path.extname(filePath).toLowerCase()
+    const metadata = await sharp(filePath, { failOn: 'none' }).metadata()
+    if (!metadata.width || !metadata.height) return // فرمتِ ناشناس برای sharp (مثلاً gif متحرک) — دست‌نخورده می‌ماند
+
+    const needsResize = metadata.width > maxDimension || metadata.height > maxDimension
+
+    let pipeline = sharp(filePath, { failOn: 'none' }).rotate() // rotate() بدون آرگومان: EXIF orientation را اعمال و حذف می‌کند
+    if (needsResize) {
+      pipeline = pipeline.resize({ width: maxDimension, height: maxDimension, fit: 'inside', withoutEnlargement: true })
+    }
+
+    if (ext === '.png') {
+      pipeline = pipeline.png({ compressionLevel: 9, palette: true })
+    } else if (ext === '.webp') {
+      pipeline = pipeline.webp({ quality: jpegQuality })
+    } else {
+      // .jpg/.jpeg و هر پسوندِ دیگرِ عکس (heic و مشابه، اگر sharp بتواند دیکد کند)
+      pipeline = pipeline.jpeg({ quality: jpegQuality, mozjpeg: true })
+    }
+
+    tempPath = path.join(path.dirname(filePath), `optimize-${Date.now()}-${path.basename(filePath)}`)
+    await pipeline.toFile(tempPath)
+
+    const [originalStat, optimizedStat] = await Promise.all([fs.stat(filePath), fs.stat(tempPath)])
+    if (optimizedStat.size >= originalStat.size) {
+      await fs.remove(tempPath)
+      return
+    }
+
+    await fs.rename(tempPath, filePath)
+    console.log(`[imageOptimize] ${path.basename(filePath)}: ${originalStat.size} -> ${optimizedStat.size} bytes`)
+  } catch (error) {
+    console.error('[imageOptimize] failed:', error.message)
+    if (tempPath) await fs.remove(tempPath).catch(() => {})
+  }
+}
+
+module.exports = { optimizeImageFile, DEFAULT_MAX_DIMENSION, DEFAULT_JPEG_QUALITY }
diff --git a/utils/postVideoProcessing.js b/utils/postVideoProcessing.js
index 2dc8dc1..ff05c7c 100644
--- a/utils/postVideoProcessing.js
+++ b/utils/postVideoProcessing.js
@@ -16,26 +16,73 @@ async function runFfmpeg(command) {
   }
 }
 
-/** faststart بدون re-encode — شروع پخش سریع‌تر */
+// موبایل/وب هیچ‌جا بیشتر از این نمایش داده نمی‌شه — ویدیوی خامِ دوربین (اغلب ۱۰۸۰p+ با
+// بیت‌ریتِ چند برابرِ لازم) رو بدون افتِ کیفیتِ محسوس به این سقف می‌رسونیم
+const VIDEO_MAX_DIMENSION = 1280;
+const VIDEO_MAX_BITRATE_KBPS = 2500;
+
+async function probeVideo(filePath) {
+  try {
+    const { stdout } = await execPromise(
+      `ffprobe -v error -select_streams v:0 -show_entries stream=width,height,bit_rate -show_entries format=bit_rate -of json "${filePath}"`
+    );
+    const data = JSON.parse(stdout);
+    const stream = data.streams?.[0] || {};
+    const width = Number(stream.width) || 0;
+    const height = Number(stream.height) || 0;
+    const bitRateBps = Number(stream.bit_rate) || Number(data.format?.bit_rate) || 0;
+    return { width, height, bitRateKbps: bitRateBps ? Math.round(bitRateBps / 1000) : 0 };
+  } catch (error) {
+    console.error("[postVideoProcessing] probe failed:", error.message);
+    return null;
+  }
+}
+
+/**
+ * فایل رو یا فقط faststart می‌کنه (بدون کیفیت‌کاهی، وقتی از قبل کوچیک/بهینه‌ست) یا
+ * وقتی رزولوشن/بیت‌ریت بیشتر از چیزیه که کاربر واقعاً می‌بینه، دوباره با سقفِ
+ * رزولوشن+بیت‌ریت انکود می‌کنه (که faststart هم توش هست، جداگانه لازم نیست)
+ */
 async function optimizeVideoFaststart(filePath) {
   if (!(await fs.pathExists(filePath))) return;
 
   const dir = path.dirname(filePath);
   const base = path.basename(filePath);
-  const tempPath = path.join(dir, `faststart-${Date.now()}-${base}`);
+  const info = await probeVideo(filePath);
 
-  const ok = await runFfmpeg(
-    `ffmpeg -i "${filePath}" -c copy -movflags +faststart "${tempPath}" -y`
-  );
+  const needsReencode =
+    info && ((info.width > VIDEO_MAX_DIMENSION || info.height > VIDEO_MAX_DIMENSION) ||
+      (info.bitRateKbps > 0 && info.bitRateKbps > VIDEO_MAX_BITRATE_KBPS * 1.3));
+
+  const tempPath = path.join(dir, `optimize-${Date.now()}-${base}`);
+
+  const ok = needsReencode
+    ? await runFfmpeg(
+        `ffmpeg -i "${filePath}" -vf "scale='min(${VIDEO_MAX_DIMENSION},iw)':'min(${VIDEO_MAX_DIMENSION},ih)':force_original_aspect_ratio=decrease" -c:v libx264 -preset veryfast -crf 25 -maxrate ${VIDEO_MAX_BITRATE_KBPS}k -bufsize ${VIDEO_MAX_BITRATE_KBPS * 2}k -c:a aac -b:a 128k -movflags +faststart "${tempPath}" -y`
+      )
+    : await runFfmpeg(
+        `ffmpeg -i "${filePath}" -c copy -movflags +faststart "${tempPath}" -y`
+      );
 
   if (!ok || !(await fs.pathExists(tempPath))) return;
 
   try {
+    const [originalStat, optimizedStat] = await Promise.all([
+      fs.stat(filePath),
+      fs.stat(tempPath),
+    ]);
+    // اگه انکودِ جدید بزرگ‌تر شد (ویدیوی خیلی کوتاه/از قبل فشرده)، فایلِ اصلی نگه داشته می‌شه
+    if (needsReencode && optimizedStat.size >= originalStat.size) {
+      await fs.remove(tempPath).catch(() => {});
+      return;
+    }
     await fs.rename(tempPath, filePath);
-    console.log(`[postVideoProcessing] faststart applied: ${base}`);
+    console.log(
+      `[postVideoProcessing] ${needsReencode ? "re-encoded" : "faststart applied"}: ${base} (${originalStat.size} -> ${optimizedStat.size} bytes)`
+    );
   } catch (error) {
     await fs.remove(tempPath).catch(() => {});
-    console.error("[postVideoProcessing] faststart rename failed:", error.message);
+    console.error("[postVideoProcessing] rename failed:", error.message);
   }
 }
 
diff --git a/utils/storyPhotoFilters.js b/utils/storyPhotoFilters.js
index 45e472d..70f9337 100644
--- a/utils/storyPhotoFilters.js
+++ b/utils/storyPhotoFilters.js
@@ -15,10 +15,19 @@ const STORY_PHOTO_FILTERS = {
 
 const STORY_PHOTO_FILTER_NAMES = Object.keys(STORY_PHOTO_FILTERS)
 
+// همون سقفِ اندازه‌ی storyController.js — این بافر بعداً دوباره از موبایل به createStoryBase64
+// آپلود می‌شه، پس کوچیک نگه‌داشتنش اینجا هم رفت‌وبرگشتِ پیش‌نمایش و هم آپلودِ نهایی رو کم می‌کنه
+const STORY_MAX_DIMENSION = 1440
+
 /** buffer ورودی -> بافرِ jpeg خروجی با فیلترِ اعمال‌شده. filterName نامعتبر => همون تصویر اصلی. */
 async function applyStoryPhotoFilter (buffer, filterName) {
   const apply = STORY_PHOTO_FILTERS[filterName] || STORY_PHOTO_FILTERS.normal
-  return apply(sharp(buffer)).jpeg({ quality: 90 }).toBuffer()
+  const image = apply(sharp(buffer).rotate())
+  const metadata = await sharp(buffer).metadata()
+  const resized = (metadata.width > STORY_MAX_DIMENSION || metadata.height > STORY_MAX_DIMENSION)
+    ? image.resize({ width: STORY_MAX_DIMENSION, height: STORY_MAX_DIMENSION, fit: 'inside', withoutEnlargement: true })
+    : image
+  return resized.jpeg({ quality: 85, mozjpeg: true }).toBuffer()
 }
 
 module.exports = { STORY_PHOTO_FILTERS, STORY_PHOTO_FILTER_NAMES, applyStoryPhotoFilter }