---
title: failureURLString
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/urlerror/failureurlstring
---

# failureURLString

The string for the URL which caused a load to fail.

## Declaration

```swift
var failureURLString: String? { get }
```

## See Also

### Error details

- [failingURL](foundation/urlerror/failingurl.md)
- [failureURLPeerTrust](foundation/urlerror/failureurlpeertrust.md)
- [downloadTaskResumeData](foundation/urlerror/downloadtaskresumedata.md)
- [backgroundTaskCancelledReason](foundation/urlerror/backgroundtaskcancelledreason-swift.property.md)
- [URLError.BackgroundTaskCancelledReason](foundation/urlerror/backgroundtaskcancelledreason-swift.enum.md)
- [networkUnavailableReason](foundation/urlerror/networkunavailablereason-swift.property.md)
- [URLError.NetworkUnavailableReason](foundation/urlerror/networkunavailablereason-swift.enum.md)