diff --git a/homeassistant/components/zwave_js/api.py b/homeassistant/components/zwave_js/api.py
index 91c316d307e..bed2166a4da 100644
--- a/homeassistant/components/zwave_js/api.py
+++ b/homeassistant/components/zwave_js/api.py
@@ -281,9 +281,9 @@ class DumpView(HomeAssistantView):
         msgs = await dump.dump_msgs(entry.data[CONF_URL], async_get_clientsession(hass))
 
         return web.Response(
-            body="\n".join(json.dumps(msg) for msg in msgs) + "\n",
+            body=json.dumps(msgs, indent=2) + "\n",
             headers={
-                hdrs.CONTENT_TYPE: "application/jsonl",
-                hdrs.CONTENT_DISPOSITION: 'attachment; filename="zwave_js_dump.jsonl"',
+                hdrs.CONTENT_TYPE: "application/json",
+                hdrs.CONTENT_DISPOSITION: 'attachment; filename="zwave_js_dump.json"',
             },
         )
diff --git a/tests/components/zwave_js/test_api.py b/tests/components/zwave_js/test_api.py
index 88e8acc5771..a36743421c9 100644
--- a/tests/components/zwave_js/test_api.py
+++ b/tests/components/zwave_js/test_api.py
@@ -1,4 +1,5 @@
 """Test the Z-Wave JS Websocket API."""
+import json
 from unittest.mock import patch
 
 from zwave_js_server.event import Event
@@ -164,7 +165,7 @@ async def test_dump_view(integration, hass_client):
     ):
         resp = await client.get(f"/api/zwave_js/dump/{integration.entry_id}")
     assert resp.status == 200
-    assert await resp.text() == '{"hello": "world"}\n{"second": "msg"}\n'
+    assert json.loads(await resp.text()) == [{"hello": "world"}, {"second": "msg"}]
 
 
 async def test_dump_view_invalid_entry_id(integration, hass_client):