# WISSID The Service Set Identifier (SSID) for a Wi-Fi network, from which applications derive the human-readable network name. ``` struct WISSID ``` ## Overview An SSID represents the identifier for a wireless network, as the Wi-Fi standard defines. Your app converts this binary data to text when displaying network names to people. The Wi-Fi standard defines SSIDs as binary values between 1 and 32 bytes long, without specifying a text encoding. This means SSID data can include: - Embedded null bytes (`0x00`) - Control characters and escape sequences - Non-printable binary data - Text in various encodings (UTF-8, ASCII, Latin-1, etc.) - Mixed binary and text content Don’t assume SSID data represents UTF-8 encoded text. Use [`stringRepresentation(encoding:)`](/documentation/WiFiInfrastructure/WISSID/stringRepresentation(encoding:)) to safely convert the raw data to a readable format. Since no standard encoding exists for SSIDs, different networks may use different text encodings or contain pure binary data. When converting SSIDs to strings: - Try UTF-8 encoding first, as it’s most common. - Fall back to other encodings if UTF-8 conversion fails. - Handle cases where no text representation is possible. - Consider displaying raw hexadecimal values for non-text SSIDs. ## Topics ### Working with SSIDs as a string [`init?(String, encoding: String.Encoding)`](/documentation/WiFiInfrastructure/WISSID/init(_:encoding:)) Creates an SSID from a text string using the specified encoding. [`func stringRepresentation(encoding: String.Encoding) -> String?`](/documentation/WiFiInfrastructure/WISSID/stringRepresentation(encoding:)) Converts the SSID’s raw data to a string representation using the specified encoding. ### Working with raw SSID data [`init?(Data)`](/documentation/WiFiInfrastructure/WISSID/init(_:)) Creates an SSID from raw binary data. [`let data: Data`](/documentation/WiFiInfrastructure/WISSID/data) The raw binary data of the SSID as transmitted over-the-air. ### Getting a description [`var description: String`](/documentation/WiFiInfrastructure/WISSID/description) This property provides a readable representation suitable for logging and debugging. ## Relationships ### Conforms To [`Encodable`](/documentation/Swift/Encodable) [`Hashable`](/documentation/Swift/Hashable) [`Sendable`](/documentation/Swift/Sendable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible) [`Equatable`](/documentation/Swift/Equatable) [`Decodable`](/documentation/Swift/Decodable) --- 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)