diff --git a/backend/app/Controllers/GroupController.php b/backend/app/Controllers/GroupController.php
index 7f567e6..37bd615 100644
--- a/backend/app/Controllers/GroupController.php
+++ b/backend/app/Controllers/GroupController.php
@@ -70,4 +70,47 @@ class GroupController extends BaseController
 
         $response->json(['status' => 'success', 'message' => 'Contact added to group']);
     }
+
+    /**
+     * Attach multiple contacts to a group in bulk
+     */
+    public function bulkAddContacts(Request $request, Response $response)
+    {
+        $errors = $this->validate($request, [
+            'group_id' => 'required',
+            'contact_ids' => 'required'
+        ]);
+        if (!empty($errors)) {
+            $response->status(400)->json(['status' => 'error', 'errors' => $errors]);
+            return;
+        }
+
+        $body = $request->getBody();
+        $groupId = (int)$body['group_id'];
+        $contactIds = $body['contact_ids'];
+
+        if (!is_array($contactIds)) {
+            $response->status(400)->json(['status' => 'error', 'message' => 'contact_ids must be an array']);
+            return;
+        }
+
+        $groupModel = new ContactGroup();
+        
+        $pdo = \App\Core\Database::getConnection();
+        try {
+            $pdo->beginTransaction();
+            foreach ($contactIds as $contactId) {
+                $groupModel->attachContact($groupId, (int)$contactId);
+            }
+            $pdo->commit();
+        } catch (\Exception $e) {
+            if ($pdo->inTransaction()) {
+                $pdo->rollBack();
+            }
+            $response->status(500)->json(['status' => 'error', 'message' => 'Bulk insert failed: ' . $e->getMessage()]);
+            return;
+        }
+
+        $response->json(['status' => 'success', 'message' => 'Contacts added to group in bulk']);
+    }
 }
diff --git a/backend/public/index.html b/backend/public/index.html
index ab8198a..e26e56f 100644
--- a/backend/public/index.html
+++ b/backend/public/index.html
@@ -713,7 +713,7 @@
                         <button class="nav-item" :class="{ 'active': activeDashboardTab === 'whatsapp' }" @click="activeDashboardTab = 'whatsapp'" id="nav-whatsapp-btn">
                             <span>📱</span> WhatsApp Connection
                         </button>
-                        <button class="nav-item" :class="{ 'active': activeDashboardTab === 'contacts' }" @click="activeDashboardTab = 'contacts'; fetchContacts()" id="nav-contacts-btn">
+                        <button class="nav-item" :class="{ 'active': activeDashboardTab === 'contacts' }" @click="activeDashboardTab = 'contacts'; fetchContacts(); fetchGroups()" id="nav-contacts-btn">
                             <span>👥</span> Contacts Directory
                         </button>
                         <button class="nav-item" :class="{ 'active': activeDashboardTab === 'templates' }" @click="activeDashboardTab = 'templates'; fetchTemplates()" id="nav-templates-btn">
@@ -846,10 +846,31 @@
                                 <button class="btn btn-primary" style="width: auto; padding: 0.5rem 1rem; font-size: 0.85rem;" @click="openAddContactModal()" id="btn-add-contact">+ Add Contact</button>
                             </div>
 
+                            <!-- Bulk Action Bar -->
+                            <div x-show="selectedContactIds.length > 0" class="bulk-action-bar" style="background: rgba(6, 182, 212, 0.1); border: 1px solid var(--primary-accent); padding: 1rem; border-radius: 10px; margin-bottom: 1.5rem; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; animation: fadeIn 0.3s ease-out;">
+                                <span style="font-size: 0.9rem; color: var(--text-primary); font-weight: 600;">
+                                    Selected: <span x-text="selectedContactIds.length" style="color: var(--primary-accent);"></span> contact(s)
+                                </span>
+                                <div style="display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap;">
+                                    <select class="form-input" style="width: auto; padding: 0.5rem 1rem; font-size: 0.85rem;" x-model="bulkGroupId" @focus="fetchGroups()">
+                                        <option value="">-- Add to Existing Group --</option>
+                                        <template x-for="grp in groups" :key="grp.id">
+                                            <option :value="grp.id" x-text="grp.name"></option>
+                                        </template>
+                                    </select>
+                                    <span style="color: var(--text-secondary); font-size: 0.85rem;">or</span>
+                                    <input type="text" class="form-input" style="width: 180px; padding: 0.5rem 1rem; font-size: 0.85rem;" placeholder="New Group Name" x-model="bulkNewGroupName">
+                                    <button class="btn btn-primary" style="width: auto; padding: 0.5rem 1rem; font-size: 0.85rem;" @click="applyBulkGroup()">Apply Grouping</button>
+                                </div>
+                            </div>
+
                             <div class="data-table-container">
                                 <table class="data-table">
                                     <thead>
                                         <tr>
+                                            <th style="width: 40px; text-align: center;">
+                                                <input type="checkbox" @change="selectedContactIds = $event.target.checked ? contacts.map(c => c.id) : []" :checked="contacts.length > 0 && selectedContactIds.length === contacts.length" style="cursor: pointer; width: 16px; height: 16px;">
+                                            </th>
                                             <th>Name</th>
                                             <th>Phone</th>
                                             <th>Email</th>
@@ -859,6 +880,9 @@
                                     <tbody>
                                         <template x-for="contact in contacts" :key="contact.id">
                                             <tr>
+                                                <td style="text-align: center;">
+                                                    <input type="checkbox" :value="contact.id" x-model="selectedContactIds" style="cursor: pointer; width: 16px; height: 16px;">
+                                                </td>
                                                 <td class="font-semibold" x-text="contact.name"></td>
                                                 <td x-text="contact.phone || 'N/A'"></td>
                                                 <td x-text="contact.email || 'N/A'"></td>
@@ -1154,6 +1178,9 @@
                 activeDashboardTab: 'whatsapp',
                 whatsappSession: null,
                 contacts: [],
+                selectedContactIds: [],
+                bulkGroupId: '',
+                bulkNewGroupName: '',
                 templates: [],
                 campaigns: [],
                 pollingIntervalId: null,
@@ -1397,6 +1424,9 @@
 
                 // CRM List Fetchers
                 async fetchContacts() {
+                    this.selectedContactIds = [];
+                    this.bulkGroupId = '';
+                    this.bulkNewGroupName = '';
                     try {
                         const response = await fetch('/api/contacts', {
                             headers: { 'Authorization': `Bearer ${this.token}` }
@@ -1410,6 +1440,67 @@
                     }
                 },
 
+                async applyBulkGroup() {
+                    if (this.selectedContactIds.length === 0) {
+                        alert('Please select at least one contact first.');
+                        return;
+                    }
+                    if (!this.bulkGroupId && !this.bulkNewGroupName.trim()) {
+                        alert('Please select an existing group or type a new group name.');
+                        return;
+                    }
+
+                    this.actionLoading = true;
+                    try {
+                        let groupId = this.bulkGroupId;
+
+                        // If a new group name is typed, create the group first
+                        if (this.bulkNewGroupName.trim()) {
+                            const newGroupRes = await fetch('/api/groups', {
+                                method: 'POST',
+                                headers: {
+                                    'Content-Type': 'application/json',
+                                    'Authorization': `Bearer ${this.token}`
+                                },
+                                body: JSON.stringify({ name: this.bulkNewGroupName.trim() })
+                            });
+                            const newGroupData = await newGroupRes.json();
+                            if (!newGroupRes.ok) {
+                                throw new Error(newGroupData.message || newGroupData.error || 'Failed to create group');
+                            }
+                            groupId = newGroupData.id;
+                        }
+
+                        // Attach selected contacts in bulk
+                        const bulkRes = await fetch('/api/groups/bulk-add', {
+                            method: 'POST',
+                            headers: {
+                                'Content-Type': 'application/json',
+                                'Authorization': `Bearer ${this.token}`
+                            },
+                            body: JSON.stringify({
+                                group_id: groupId,
+                                contact_ids: this.selectedContactIds
+                            })
+                        });
+                        const bulkData = await bulkRes.json();
+                        if (bulkRes.ok) {
+                            alert('Successfully added selected contacts to the group!');
+                            this.selectedContactIds = [];
+                            this.bulkGroupId = '';
+                            this.bulkNewGroupName = '';
+                            await this.fetchGroups();
+                        } else {
+                            alert(bulkData.error || bulkData.message || 'Failed to apply grouping.');
+                        }
+                    } catch (err) {
+                        console.error('Error applying bulk grouping:', err);
+                        alert(err.message || 'An error occurred during bulk grouping.');
+                    } finally {
+                        this.actionLoading = false;
+                    }
+                },
+
                 async fetchTemplates() {
                     try {
                         const response = await fetch('/api/templates', {
diff --git a/backend/public/index.php b/backend/public/index.php
index 84b1ff4..18a1998 100644
--- a/backend/public/index.php
+++ b/backend/public/index.php
@@ -56,6 +56,7 @@ $router->post('/api/contacts',     [\App\Controllers\ContactController::class, '
 $router->get('/api/groups',        [\App\Controllers\GroupController::class, 'index'],        [\App\Middlewares\AuthMiddleware::class]);
 $router->post('/api/groups',       [\App\Controllers\GroupController::class, 'store'],        [\App\Middlewares\AuthMiddleware::class]);
 $router->post('/api/groups/add',   [\App\Controllers\GroupController::class, 'addContact'],   [\App\Middlewares\AuthMiddleware::class]);
+$router->post('/api/groups/bulk-add', [\App\Controllers\GroupController::class, 'bulkAddContacts'], [\App\Middlewares\AuthMiddleware::class]);
 
 $router->get('/api/templates',     [\App\Controllers\TemplateController::class, 'index'],     [\App\Middlewares\AuthMiddleware::class]);
 $router->post('/api/templates',    [\App\Controllers\TemplateController::class, 'store'],     [\App\Middlewares\AuthMiddleware::class]);