# isContentTypeBinary

**Kind:** Function

**Source:** [`src/adapter/lambda-edge/handler.ts`](https://github.com/honojs/hono/blob/main/src/adapter/lambda-edge/handler.ts#L214)

**Part of:** [Adapter](subsystem-src-adapter)

## Signature

```ts
function isContentTypeBinary(contentType: string): boolean
```

## Parameters

| Name | Type |
|---|---|
| `contentType` | `string` |

**Returns:** `boolean`