📚 Documentation • 🚀 Getting Started • 📃 Support Policy • 💬 Feedback

This library doesn’t validate the JWT. Any well-formed JWT can be decoded from Base64URL.

Migrating from v2? Check the Migration Guide.

Documentation

• API Documentation - documentation auto-generated from the code comments that explains all the available features.
  • JWT
  • Claim
  • JWTDecodeError
• Auth0 Documentation - explore our docs site and learn more about Auth0.

Note Check the Support Policy to learn when dropping Xcode, Swift, and platform versions will not be considered a breaking change.

Getting Started

Requirements

• iOS 12.0+ / macOS 10.15+ / tvOS 12.0+ / watchOS 6.2+
• Xcode 13.x / 14.x
• Swift 5.5+

Installation

Swift Package Manager

Open the following menu item in Xcode:

File > Add Packages…

In the Search or Enter Package URL search box enter this URL:

https://github.com/auth0/JWTDecode.swift

Then, select the dependency rule and press Add Package.

Cocoapods

Add the following line to your Podfile:

pod 'JWTDecode', '~> 3.1'

Then, run pod install.

Carthage

Add the following line to your Cartfile:

github "auth0/JWTDecode.swift" ~> 3.1

Then, run carthage bootstrap --use-xcframeworks.

Usage

See all the available features in the API documentation ↗

1. Import the framework

import JWTDecode

2. Decode the token

let jwt = try decode(jwt: token)    

JWT parts

Part	Property
Header dictionary	jwt.header
Claims in JWT body	jwt.body
JWT signature	jwt.signature

Registered claims

Claim	Property
aud Audience	jwt.audience
sub Subject	jwt.subject
jti JWT ID	jwt.identifier
iss Issuer	jwt.issuer
nbf Not Before	jwt.notBefore
iat Issued At	jwt.issuedAt
exp Expiration Time	jwt.expiresAt

Custom claims

You can retrieve a custom claim through a subscript and then attempt to convert the value to a specific type.

if let email = jwt["email"].string {
    print("Email is \(email)")
}

The supported conversions are:

var string: String?
var boolean: Bool?
var integer: Int?
var double: Double?
var date: Date?
var array: [String]?

You can easily add a convenience accessor for a custom claim in an extension.

extension JWT {
    var myClaim: String? {
        return self["my_claim"].string
    }
}

Error handling

If the JWT is malformed the decode(jwt:) function will throw a JWTDecodeError.

catch let error as JWTDecodeError {
    print(error)
}

Support Policy

This Policy defines the extent of the support for Xcode, Swift, and platform (iOS, macOS, tvOS, and watchOS) versions in JWTDecode.swift.

Xcode

The only supported versions of Xcode are those that can be currently used to submit apps to the App Store. Once a Xcode version becomes unsupported, dropping it from JWTDecode.swift will not be considered a breaking change, and will be done in a minor release.

Swift

The minimum supported Swift minor version is the one released with the oldest-supported Xcode version. Once a Swift minor becomes unsupported, dropping it from JWTDecode.swift will not be considered a breaking change, and will be done in a minor release.

Platforms

Only the last 4 major platform versions are supported, starting from:

• iOS 12
• macOS 10.15
• macCatalyst 13
• tvOS 12
• watchOS 6.2

Once a platform version becomes unsupported, dropping it from JWTDecode.swift will not be considered a breaking change, and will be done in a minor release. For example, iOS 13 will cease to be supported when iOS 17 gets released, and JWTDecode.swift will be able to drop it in a minor release.

In the case of macOS, the yearly named releases are considered a major platform version for the purposes of this Policy, regardless of the actual version numbers.

Feedback

Contributing

We appreciate feedback and contribution to this repo! Before you get started, please see the following:

• Auth0’s general contribution guidelines
• Auth0’s code of conduct guidelines
• JWTDecode.swift’s contribution guide

Raise an issue

To provide feedback or report a bug, please raise an issue on our issue tracker.

Vulnerability reporting

Please do not report security vulnerabilities on the public GitHub issue tracker. The Responsible Disclosure Program details the procedure for disclosing security issues.

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Auth0 is an easy to implement, adaptable authentication and authorization platform. To learn more checkout Why Auth0?

This project is licensed under the MIT license. See the LICENSE file for more info.