<!--
{
  "availability" : [
    "iOS: 16.0.0 -",
    "iPadOS: 16.0.0 -",
    "macOS: 11.0.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "FileProvider",
  "identifier" : "/documentation/FileProvider/NSFileProviderThumbnailing",
  "metadataVersion" : "0.1.0",
  "role" : "Protocol",
  "symbol" : {
    "kind" : "Protocol",
    "modules" : [
      "File Provider"
    ],
    "preciseIdentifier" : "c:objc(pl)NSFileProviderThumbnailing"
  },
  "title" : "NSFileProviderThumbnailing"
}
-->

# NSFileProviderThumbnailing

Support for item thumbnails.

```
protocol NSFileProviderThumbnailing : NSObjectProtocol
```

## Overview

Adopt this protocol if your File Provider extension supports downloading thumbnails from the remote storage.

## Topics

### Providing Thumbnails

[`fetchThumbnails(for:requestedSize:perThumbnailCompletionHandler:completionHandler:)`](/documentation/FileProvider/NSFileProviderThumbnailing/fetchThumbnails(for:requestedSize:perThumbnailCompletionHandler:completionHandler:))

Asks the file provider for a thumbnail of the specified items.


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)