# fileURL(withFileSystemRepresentation:isDirectory:relativeTo:) Returns a new URL object initialized with a C string representing a local file system path. ``` class func fileURL(withFileSystemRepresentation path: UnsafePointer, isDirectory isDir: Bool, relativeTo baseURL: URL?) -> URL ``` ## Parameters `path` A null-terminated C string in file system representation containing the path to represent as a URL. If this path is a relative path, it is treated as being relative to the current working directory. `isDir` if the last path part is a directory, otherwise . `baseURL` The base URL for the new URL object. This must be a file URL. If `path` is absolute, this URL is ignored. ## Return Value Returns the new object. ## Discussion The file system representation format is described in [File System Programming Guide](https://developer.apple.com/library/archive/documentation/FileManagement/Conceptual/FileSystemProgrammingGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40010672). --- 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)