diff --git a/crm/urls.py b/crm/urls.py
index e6e5749..5affcc4 100644
--- a/crm/urls.py
+++ b/crm/urls.py
@@ -14,6 +14,7 @@ urlpatterns = [
     path('sellers/', seller_views.list_sellers, name='list_sellers'),
     path('sellers/<int:pk>/', seller_views.get_seller_detail, name='get_seller_detail'),
     path('sellers/<int:pk>/documents/', seller_views.get_seller_documents, name='get_seller_documents'),
+    path('sellers/documents/preview/', seller_views.preview_document, name='preview_document'),
     path('sellers/<int:pk>/documents/<str:doc_id>/approve/', seller_views.approve_seller_document, name='approve_seller_document'),
     path('sellers/<int:pk>/approve/', seller_views.approve_seller, name='approve_seller'),
     path('sellers/<int:pk>/reject/', seller_views.reject_seller, name='reject_seller'),
diff --git a/crm/views/seller_views.py b/crm/views/seller_views.py
index 4b0537b..29edd0e 100644
--- a/crm/views/seller_views.py
+++ b/crm/views/seller_views.py
@@ -54,29 +54,33 @@ def get_seller_documents(request, pk):
     docs = []
     if seller.aadhar_file:
         is_verified = f"aadhar_{pk}" in APPROVED_DOCUMENTS
+        url = request.build_absolute_uri(f"/api/crm/sellers/documents/preview/?file={seller.aadhar_file}")
         docs.append({
             "id": "aadhar",
             "type": "Aadhar Card",
             "filename": seller.aadhar_file,
-            "url": f"https://digihox-kyc-bucket.s3.ap-south-2.amazonaws.com/{seller.aadhar_file}?token=presigned123",
+            "url": url,
             "status": "Verified" if is_verified else "Pending"
         })
     if seller.pan_file:
         is_verified = f"pan_{pk}" in APPROVED_DOCUMENTS
+        url = request.build_absolute_uri(f"/api/crm/sellers/documents/preview/?file={seller.pan_file}")
         docs.append({
             "id": "pan",
             "type": "PAN Card",
             "filename": seller.pan_file,
-            "url": f"https://digihox-kyc-bucket.s3.ap-south-2.amazonaws.com/{seller.pan_file}?token=presigned123",
+            "url": url,
             "status": "Verified" if is_verified else "Pending"
         })
     if seller.gstin:
         is_verified = f"gstin_{pk}" in APPROVED_DOCUMENTS or seller.is_gstin_verified
+        filename = f"gst_{seller.gstin}.pdf"
+        url = request.build_absolute_uri(f"/api/crm/sellers/documents/preview/?file={filename}")
         docs.append({
             "id": "gstin",
             "type": "GSTIN Certificate",
-            "filename": f"gst_{seller.gstin}.pdf",
-            "url": f"https://digihox-kyc-bucket.s3.ap-south-2.amazonaws.com/gst_{seller.gstin}.pdf?token=presigned123",
+            "filename": filename,
+            "url": url,
             "status": "Verified" if is_verified else "Pending"
         })
         
@@ -204,3 +208,32 @@ def delete_seller(request, pk):
 
     log_action(request.user, 'delete_seller', pk, {"name": name})
     return Response({"message": f"Seller account '{name}' and associated user permanently removed"})
+
+import io
+from django.http import FileResponse
+
+@api_view(['GET'])
+@permission_classes([IsCRMAdmin])
+def preview_document(request):
+    filename = request.query_params.get('file', 'document.pdf')
+    if filename.endswith('.pdf'):
+        pdf_data = (
+            b"%PDF-1.4\n"
+            b"1 0 obj\n<< /Type /Catalog /Pages 2 0 R >>\nendobj\n"
+            b"2 0 obj\n<< /Type /Pages /Kids [3 0 R] /Count 1 >>\nendobj\n"
+            b"3 0 obj\n<< /Type /Page /Parent 2 0 R /MediaBox [0 0 595 842] /Contents 4 0 R >>\nendobj\n"
+            b"4 0 obj\n<< /Length 73 >>\nstream\n"
+            b"BT\n/F1 24 Tf\n100 700 Td\n(DigiHox Verified KYC Document Preview) Tj\nET\n"
+            b"endstream\n"
+            b"endobj\n"
+            b"xref\n0 5\n0000000000 65535 f\n0000000009 00000 n\n0000000056 00000 n\n"
+            b"0000000111 00000 n\n0000000212 00000 n\n"
+            b"trailer\n<< /Size 5 /Root 1 0 R >>\nstartxref\n335\n%%EOF\n"
+        )
+        return FileResponse(io.BytesIO(pdf_data), content_type='application/pdf')
+    else:
+        png_data = (
+            b'\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00\x01\x00\x00\x00\x01\x08\x06\x00\x00\x00\x1f\x15\xc4\x89'
+            b'\x00\x00\x00\rIDATx\x9cc`\x00\x00\x00\x02\x00\x01H\xaf\xa4q\x00\x00\x00\x00IEND\xaeB`\x82'
+        )
+        return FileResponse(io.BytesIO(png_data), content_type='image/png')