diff --git a/backend/middleware/validator.js b/backend/middleware/validator.js
new file mode 100644
index 0000000..5dbce52
--- /dev/null
+++ b/backend/middleware/validator.js
@@ -0,0 +1,10 @@
+import { validationResult } from "express-validator"
+
+const validator = (req, res, next) => {
+    const result = validationResult(req);
+    if(result.isEmpty())
+       return next();
+    res.status(400).json({ errors: result.array() });
+}
+
+export default validator;
\ No newline at end of file
diff --git a/backend/routes/orderRoutes.js b/backend/routes/orderRoutes.js
index 8a0afe5..b44fb20 100644
--- a/backend/routes/orderRoutes.js
+++ b/backend/routes/orderRoutes.js
@@ -1,5 +1,4 @@
 import express from 'express';
-const router = express.Router();
 import { protect, admin } from '../middleware/authMiddleware.js';
 import {
   addOrderItems,
@@ -9,12 +8,55 @@ import {
   updateOrderToDeliver,
   getOrders
 } from '../controllers/orderController.js';
+import validateRequest from '../middleware/validator.js';
+import { param, check } from 'express-validator';
+
+const router = express.Router();
+
+const validator = {
+  getOrderById: [
+    param('id').notEmpty().withMessage('Id is required').isMongoId().withMessage('Invalid Id Format')
+  ],
+  updateOrderToPaid: [
+    param('id').notEmpty().withMessage('Id is required').isMongoId().withMessage('Invalid Id Format')
+  ],
+  updateOrderToDeliver: [
+    param('id').notEmpty().withMessage('Id is required').isMongoId().withMessage('Invalid Id Format')
+  ],
+  addOrderItems: [
+    check('cartItems').notEmpty().withMessage('Cart items are required'),
+    check('shippingAddress').notEmpty().withMessage('Shipping address is required'),
+    check('paymentMethod').notEmpty().withMessage('Payment method is required'),
+    check('itemsPrice')
+      .notEmpty()
+      .withMessage('Items price is required')
+      .isNumeric()
+      .withMessage('Items price must be a number'),
+    check('taxPrice')
+      .notEmpty()
+      .withMessage('Tax price is required')
+      .isNumeric()
+      .withMessage('Tax price must be a number'),
+    check('shippingPrice')
+      .notEmpty()
+      .withMessage('Shipping price is required')
+      .isNumeric()
+      .withMessage('Shipping price must be a number'),
+    check('totalPrice')
+      .notEmpty()
+      .withMessage('Total price is required')
+      .isNumeric()
+      .withMessage('Total price must be a number')
+  ]
+}
 
-router.route('/').post(protect, addOrderItems).get(protect, admin, getOrders);
+router.route('/')
+  .post(validator.addOrderItems, validateRequest, protect, addOrderItems)
+  .get(protect, admin, getOrders);
 
 router.get('/my-orders', protect, getMyOrders);
-router.get('/:id', protect, getOrderById);
-router.put('/:id/pay', protect, updateOrderToPaid);
-router.put('/:id/deliver', protect, admin, updateOrderToDeliver);
+router.get('/:id', validator.getOrderById, validateRequest, protect, getOrderById);
+router.put('/:id/pay', validator.updateOrderToPaid, validateRequest, protect, updateOrderToPaid);
+router.put('/:id/deliver', validator.updateOrderToDeliver, validateRequest, protect, admin, updateOrderToDeliver);
 
 export default router;
diff --git a/backend/routes/paymentRoutes.js b/backend/routes/paymentRoutes.js
index 6ad9c0c..75ad48b 100644
--- a/backend/routes/paymentRoutes.js
+++ b/backend/routes/paymentRoutes.js
@@ -2,13 +2,40 @@ import express from 'express';
 
 import { protect } from '../middleware/authMiddleware.js';
 import { config, order, validate } from '../controllers/paymentController.js';
+import validateRequest from '../middleware/validator.js';
+import {body, check} from 'express-validator';
 
 const router = express.Router();
 
+const validator = {
+    order: [
+        body().custom(body => {
+            if (Object.keys(body).length === 0) 
+                throw new Error('Request Body is empty')
+            return true;
+        })
+    ],
+    validate: [
+        body('razorpay_order_id')
+            .notEmpty()
+            .withMessage('Razorpay order ID is required')
+            .trim(),
+        body('razorpay_payment_id')
+            .notEmpty()
+            .withMessage('Razorpay payment ID is required')
+            .trim(),
+        body('razorpay_signature')
+            .notEmpty()
+            .withMessage('Razorpay signature is required')
+            .trim()
+            .escape()
+    ]
+}
+
 router.get('/razorpay/config', config);
 
-router.post('/razorpay/order', protect, order);
+router.post('/razorpay/order', validator.order, validateRequest, protect, order);
 
-router.post('/razorpay/order/validate', protect, validate);
+router.post('/razorpay/order/validate', validator.validate, validateRequest, protect, validate);
 
 export default router;
diff --git a/backend/routes/productRoutes.js b/backend/routes/productRoutes.js
index 67f48c0..b462983 100644
--- a/backend/routes/productRoutes.js
+++ b/backend/routes/productRoutes.js
@@ -1,4 +1,4 @@
-import express from 'express';
+import express, { query } from 'express';
 import {
   getProducts,
   getProduct,
@@ -9,16 +9,88 @@ import {
   getTopProducts
 } from '../controllers/productController.js';
 import { protect, admin } from '../middleware/authMiddleware.js';
+import validateRequest from '../middleware/validator.js';
+import {body, check, param} from 'express-validator';
 
 const router = express.Router();
 
-router.route('/').post(protect, admin, createProduct).get(getProducts);
+const validator = {
+  getProducts: [
+    check('limit').optional().isNumeric().withMessage('Limit parameter must be a number').custom(value => {
+      if(value < 0) throw new Error('Value should not be less than Zero');
+      return true;
+    }),
+    check('skip').optional().isNumeric().withMessage('skip parameter must be a number').custom(value => {
+      if(value < 0) throw new Error('Value should not be less than Zero');
+      return true;
+    }),
+    check('search').optional().trim().escape()
+  ],
+  createProduct: [
+    check('name').trim().notEmpty().withMessage('Name is required').escape(),
+    check('image').notEmpty().withMessage('Image is required'),
+    check('description')
+      .trim()
+      .notEmpty()
+      .withMessage('Description is required')
+      .escape(),
+    check('brand').trim().notEmpty().withMessage('Brand is required').escape(),
+    check('category').trim().notEmpty().withMessage('Category is required').escape(),
+    check('price')
+      .notEmpty()
+      .withMessage('Price is required')
+      .isNumeric()
+      .withMessage('Price must be a number'),
+    check('countInStock')
+      .notEmpty()
+      .withMessage('Count in stock is required')
+      .isNumeric()
+      .withMessage('Count in stock must be a number')
+  ],
+  createProductReview: [
+    param('id').notEmpty().withMessage('Id is required').isMongoId().withMessage('Invalid Id Format'),
+    body('rating').notEmpty().withMessage('Rating is Empty').bail().isNumeric().withMessage('Ratings must be number'),
+    body('comment').trim().escape()
+  ],
+  getProduct: [
+    param('id').notEmpty().withMessage('Id is required').isMongoId().withMessage('Invalid Id Format')
+  ],
+  deleteProduct: [
+    param('id').notEmpty().withMessage('Id is required').isMongoId().withMessage('Invalid Id Format')
+  ],
+  updateProduct: [
+    check('name').trim().notEmpty().withMessage('Name is required').escape(),
+    check('image').notEmpty().withMessage('Image is required'),
+    check('description')
+      .trim()
+      .notEmpty()
+      .withMessage('Description is required')
+      .escape(),
+    check('brand').trim().notEmpty().withMessage('Brand is required').escape(),
+    check('category').trim().notEmpty().withMessage('Category is required').escape(),
+    check('price')
+      .notEmpty()
+      .withMessage('Price is required')
+      .isNumeric()
+      .withMessage('Price must be a number'),
+    check('countInStock')
+      .notEmpty()
+      .withMessage('Count in stock is required')
+      .isNumeric()
+      .withMessage('Count in stock must be a number'),
+    param('id').notEmpty().withMessage('Id is required').isMongoId().withMessage('Invalid Id Format')
+  ]
+}
+
+router.route('/')
+  .post(validator.createProduct, validateRequest, protect, admin, createProduct)
+  .get(validator.getProducts, validateRequest, getProducts);
 router.get('/top', getTopProducts);
-router.post('/reviews/:id', protect, createProductReview);
+router.post('/reviews/:id', validator.createProductReview, validateRequest, protect, createProductReview);
 router
   .route('/:id')
-  .get(getProduct)
-  .put(protect, admin, updateProduct)
-  .delete(protect, admin, deleteProduct);
+  .get(validator.getProduct, validateRequest, getProduct)
+  .put(validator.updateProduct, validateRequest, protect, admin, updateProduct)
+  .delete(validator.deleteProduct, validateRequest, protect, admin, deleteProduct);
 
 export default router;
diff --git a/backend/routes/uploadRoutes.js b/backend/routes/uploadRoutes.js
index 7178d83..512bdb1 100644
--- a/backend/routes/uploadRoutes.js
+++ b/backend/routes/uploadRoutes.js
@@ -1,5 +1,6 @@
-import express from 'express';
+import express from 'express';import { body, check } from 'express-validator';
 import multer from 'multer';
+import validateRequest from '../middleware/validator.js';
 
 const router = express.Router();
 
@@ -13,7 +14,7 @@ const storage = multer.diskStorage({
 });
 
 const fileFilter = (req, file, cb) => {
-  if (
+    if (
     file.mimetype === 'image/png' ||
     file.mimetype === 'image/jpg' ||
     file.mimetype === 'image/jpeg'
@@ -21,7 +22,7 @@ const fileFilter = (req, file, cb) => {
     // To accept the file pass `true`, like so:
     cb(null, true);
   } else {
-    // To reject this file pass `false`, like so:
+        // To reject this file pass `false`, like so:
     cb('Images only!');
   }
 };
@@ -29,7 +30,9 @@ const fileFilter = (req, file, cb) => {
 const upload = multer({ storage, fileFilter }).single('image');
 
 router.post('/', upload, (req, res) => {
-  console.log(req.file);
+  if (!req.file)
+    throw res.status(400).json({error: 'No file uploaded'});
+
   res.send({
     message: 'Image uploaded',
     imageUrl: `/${req.file.path}`
diff --git a/backend/routes/userRoutes.js b/backend/routes/userRoutes.js
index 6fc71d2..bf95ddf 100644
--- a/backend/routes/userRoutes.js
+++ b/backend/routes/userRoutes.js
@@ -1,5 +1,4 @@
 import express from 'express';
-const router = express.Router();
 import {
   loginUser,
   registerUser,
@@ -15,24 +14,61 @@ import {
   resetPassword
 } from '../controllers/userController.js';
 import { protect, admin } from '../middleware/authMiddleware.js';
+import validateRequest from '../middleware/validator.js';
+import {body, param} from 'express-validator';
+
+const router = express.Router();
+const validator = {
+  checkLogin: [
+    body('email').trim().notEmpty().withMessage('Email is Required').bail().isEmail().withMessage("Please enter a valid email address"),
+    body('password').trim().isString().notEmpty().withMessage('Password is Empty')
+  ],
+  checkNewUser: [
+    body('email').trim().notEmpty().withMessage('Email is Required').bail().isEmail().withMessage("Please enter a valid email address"),
+    body('password').trim().isString().notEmpty().withMessage('Password is Empty').bail()
+      .isLength({ min: 6 }).withMessage('Password must be at least 6 characters'),
+    body('name').trim().notEmpty().withMessage('Name is Required').escape()
+  ],
+  checkGetUserById: [
+    param('id').exists().withMessage('Id is required').isMongoId().withMessage('Invalid Id')
+  ],
+  checkUpdateUser: [
+    body('email').trim().notEmpty().withMessage('Email is Required').bail().isEmail().withMessage("Please enter a valid email address"),
+    body('name').trim().notEmpty().withMessage('Name is Required').escape(),
+    body('isAdmin').isBoolean().withMessage('isAdmin value should be true/false'),
+    param('id').exists().withMessage('Id is required').isMongoId().withMessage('Invalid Id')
+  ],
+  resetPasswordRequest: [
+    body('email').trim().notEmpty().withMessage('Email is Required').bail().isEmail().withMessage("Please enter a valid email address")
+  ],
+  resetPassword: [
+    body('password').trim().notEmpty().withMessage('Password is Required').escape().bail()
+      .isLength({ min: 6 }).withMessage('Password must be at least 6 characters'),
+    param('id').exists().withMessage('Id is required').isMongoId().withMessage('Invalid Id'),
+    param('token').trim().notEmpty().withMessage('Token is Required')
+  ]
+}
+
+router.route('/')
+  .post(validator.checkNewUser, validateRequest, registerUser)
+  .get(protect, admin, getUsers);
 
-router.route('/').post(registerUser).get(protect, admin, getUsers);
 router.route('/admins').get(protect, admin, admins);
 
-router.post('/reset-password/request', resetPasswordRequest);
-router.post('/reset-password/reset/:id/:token', resetPassword);
-router.post('/login', loginUser);
+router.post('/reset-password/request', validator.resetPasswordRequest, validateRequest, resetPasswordRequest);
+router.post('/reset-password/reset/:id/:token', validator.resetPassword, validateRequest, resetPassword);
+router.post('/login', validator.checkLogin, validateRequest, loginUser);
 router.post('/logout', protect, logoutUser);
 
 router
   .route('/profile')
   .get(protect, getUserProfile)
-  .put(protect, updateUserProfile);
+  .put(validator.checkNewUser, validateRequest, protect, updateUserProfile);
 
 router
   .route('/:id')
-  .get(protect, admin, getUserById)
-  .put(protect, admin, updateUser)
-  .delete(protect, admin, deleteUser);
+  .get(validator.checkGetUserById, validateRequest, protect, admin, getUserById)
+  .put(validator.checkUpdateUser, validateRequest, protect, admin, updateUser)
+  .delete(validator.checkGetUserById, validateRequest, protect, admin, deleteUser);
 
 export default router;
diff --git a/package-lock.json b/package-lock.json
index 32dd0b4..c44126e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,6 +15,7 @@
         "cookie-parser": "^1.4.6",
         "cors": "^2.8.5",
         "express": "^4.18.2",
+        "express-validator": "^7.0.1",
         "jsonwebtoken": "^9.0.2",
         "mongoose": "^8.0.3",
         "multer": "^1.4.5-lts.1",
@@ -732,6 +733,18 @@
         "node": ">= 0.10.0"
       }
     },
+    "node_modules/express-validator": {
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/express-validator/-/express-validator-7.0.1.tgz",
+      "integrity": "sha512-oB+z9QOzQIE8FnlINqyIFA8eIckahC6qc8KtqLdLJcU3/phVyuhXH3bA4qzcrhme+1RYaCSwrq+TlZ/kAKIARA==",
+      "dependencies": {
+        "lodash": "^4.17.21",
+        "validator": "^13.9.0"
+      },
+      "engines": {
+        "node": ">= 8.0.0"
+      }
+    },
     "node_modules/extend": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
@@ -2241,6 +2254,14 @@
         "node": ">= 0.4.0"
       }
     },
+    "node_modules/validator": {
+      "version": "13.11.0",
+      "resolved": "https://registry.npmjs.org/validator/-/validator-13.11.0.tgz",
+      "integrity": "sha512-Ii+sehpSfZy+At5nPdnyMhx78fEoPDkR2XW/zimHEL3MyGJQOCQ7WeP20jPYRz7ZCpcKLB21NxuXHF3bxjStBQ==",
+      "engines": {
+        "node": ">= 0.10"
+      }
+    },
     "node_modules/vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
diff --git a/package.json b/package.json
index 8443b0a..bbd2214 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,7 @@
     "cookie-parser": "^1.4.6",
     "cors": "^2.8.5",
     "express": "^4.18.2",
+    "express-validator": "^7.0.1",
     "jsonwebtoken": "^9.0.2",
     "mongoose": "^8.0.3",
     "multer": "^1.4.5-lts.1",