# tctl v1.17 data-converter command reference

> Explore the new public preview of Temporal CLI and provide your feedback. Use the tctl dataconverter command to customize Data Converter operations with Temporal Web.

> **ℹ️ Info:**
> tctl is deprecated
>
> The tctl command line utility has been deprecated and is no longer actively supported.
> We recommend transitioning to [Temporal CLI](/cli) for continued use and access to new features.
>
> Thank you for being a valued part of the Temporal community.
>

The `tctl dataconverter` command enables custom [Data Converter](/dataconversion) operations.

- [tctl dataconverter web](#web)

## web

The `tctl dataconverter web` command specifies the WebSocket URL of a custom [Data Converter](/dataconversion) to use with Temporal Web.

`tctl dataconverter web --web_ui_url <url>`

The following modifiers control the behavior of the command.

### --port

Specify a port for the WebSocket URL of a custom [Data Converter](/dataconversion).
The default value is 0.

**Example**

```bash
tctl dataconverter web --web_ui_url <url> --port <value>
```

### --web_ui_url

_Required modifier_

Specify the WebSocket URL of a custom [Data Converter](/dataconversion).

**Example**

```bash
tctl dataconverter web --web_ui_url <url>
```