> For the complete documentation index, see [llms.txt](https://documentation.hak5.org/packet-squirrel-mark-ii/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.hak5.org/packet-squirrel-mark-ii/payload-development/duckyscript-for-packet-squirrel/ui_stop.md).

# UI\_STOP

The `UI_STOP` command halts the Packet Squirrel web UI.

Normally this is not needed, as the web UI only launches in setup or Arming mode, but advanced payloads may bring up and stop the web UI at other times.