# http/ws-send-binary
Send a binary frame on a WebSocket connection.
## Syntax
[http/ws-send-binary $conn $bytes]
## Parameters
- `$conn` — `ws_conn` resource
- `$bytes` — binary payload (string of raw bytes)
## Examples
[http/ws-send-binary $conn $blob]
## Returns
`nil`.
## See Also
`http/ws-send`, `http/ws-ping`