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# QLFileThumbnailRequest

A request to generate a thumbnail for a custom file type.

```
class QLFileThumbnailRequest
```

## Topics

### Describing the Requested Thumbnail

[`maximumSize`](/documentation/QuickLookThumbnailing/QLFileThumbnailRequest/maximumSize)

The maximum accepted size of a thumbnail.

[`minimumSize`](/documentation/QuickLookThumbnailing/QLFileThumbnailRequest/minimumSize)

The minimum accepted size of a thumbnail.

[`scale`](/documentation/QuickLookThumbnailing/QLFileThumbnailRequest/scale)

The scale of the requested thumbnail.

[`fileURL`](/documentation/QuickLookThumbnailing/QLFileThumbnailRequest/fileURL)

The URL of the image file to use for the thumbnail.

## Relationships

### Conforms To

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`Hashable`](/documentation/Swift/Hashable)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`CVarArg`](/documentation/Swift/CVarArg)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`Equatable`](/documentation/Swift/Equatable)

### Inherits From

[`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class)

---

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