> For the complete documentation index, see [llms.txt](https://wiki.4thtech.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.4thtech.io/sdk-and-white-label/encryptor/isinstalled.md).

# isInstalled

{% hint style="info" %}
Reference for SDK 0.5.x (maintenance mode). See [Status](/sdk-and-white-label/status.md).
{% endhint %}

Determines if the Encryptor Extension is installed.

### Usage

```ts
const isInstalled = await encryptorExtension.isInstalled();
```

### Returns

`Promise<boolean>`

A promise that resolves to true if the Encryptor Extension is installed, otherwise false.