How can I know when my JWT token will expire? (2024)

FAQs

How can I know when my JWT token will expire? ›

Checking JWT Expiry

To determine the expiration time of the current JWT token that was created for your Azure AD connector app, you can decode the token and check the value of the “exp” claim. There are various online JWT decoding tools available that you can use to decode the token, such as jwt.io or jwt-decode.com.

JWT validation checks the structure, claims, and signature to assure the least amount of risk. To visually inspect a JWT, visit JWT.io or use the JWT Debugger Chrome Extension). The JWT token signature is generated using a Signing Algorithm .

To verify that your expiration time is correct, you can look at the exp and iat claim of your access token. Then you can perform the following calculation: Token expiration (in seconds) = exp (Expiration time in seconds) - iat (Issued at in seconds)

The "exp" claim is used to prevent JWT token abuse, and to ensure that the JWT is not used for an extended period of time. The "exp" claim is a mandatory claim, and must be included in every JWT.

To handle JWT refresh in a SPA, you need to implement a mechanism that sends a refresh token to the server to obtain a new JWT. The refresh token is a long-lived token that is used to obtain a new JWT when the old one expires. The server verifies the refresh token and sends a new JWT to the client.

JWTs are self-contained, by-value tokens and it is very hard to revoke them, once issued and delivered to the recipient. Because of that, you should use as short an expiration time for your tokens as possible — minutes or hours at maximum. You should avoid giving your tokens expiration times in days or months.

jwt. verify(token, 'shhhhh', function(err, decoded) { if (err) { /* err = { name: 'TokenExpiredError', message: 'jwt expired', expiredAt: 1408621000 } */ } }); In short words: Check the error of that method. If it is the TokenExpiredError then, guess what... the token is expired.

public Boolean validateToken(String token, UserDetails userDetails): — This method is used to validate a JWT token. It first extracts the username from the token and then checks whether it matches the username of the provided `UserDetails` object. Additionally, it verifies whether the token has expired.

How to check if a token is expired? ›

More specifically, how do you know if it has already expired or not? When you obtain an access token, the JSON that comes back when you make a request includes another property in addition to the token itself. It's called expired_in and that is how long, in seconds, you have before the token expires.

Set a Longer Expiration Time: By default, Google Cloud API tokens expire after 1 hour. However, you can request a longer expiration time of up to 12 hours by specifying the "expires_in" parameter when you authenticate.

Your tokens can expire and can also be revoked by you, applications you have authorized, and GitHub itself.

Here's how you can do it. We're using JwtSecurityTokenHandler to generate JWT tokens. We define a SecurityTokenDescriptor where we set the subject (claims), expiry time, and signing credentials. In the Expires property of SecurityTokenDescriptor , we set the expiry time to 10 years from the current time using DateTime.

A JWT token that never expires is dangerous if the token is stolen then someone can always access the user's data. Quoted from JWT RFC: The "exp" (expiration time) claim identifies the expiration time on or after which the JWT MUST NOT be accepted for processing.

It's possible to modify the expiration time of the ID Token within the management console. This will result in a modification of the exp value within the ID Token JWT, but the expires_at value will remain unchanged.