# appendingPathComponent(_:) Returns a new URL by appending a path component to the original URL. ``` func appendingPathComponent(_ pathComponent: String) -> URL? ``` ## Parameters `pathComponent` The path component to add to the URL, in its original form (not URL encoded). ## Return Value A new URL with `pathComponent` appended. ## Discussion If the original URL does not end with a forward slash and `pathComponent` does not begin with a forward slash, a forward slash is inserted between the two parts of the returned URL, unless the original URL is the empty string. If the receiver is a file URL and `pathComponent` does not end with a trailing slash, this method may read file metadata to determine whether the resulting path is a directory. This is done synchronously, and may have significant performance costs if the receiver is a location on a network mounted filesystem. You can instead call the [`appendingPathComponent(_:isDirectory:)`](/documentation/Foundation/NSURL/appendingPathComponent(_:isDirectory:)) method if you know whether the resulting path is a directory to avoid this file metadata operation. --- Copyright © 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)