JWT Token Decode Encode Online Free

Overview

What is a JWT Token?

A JSON Web Token (JWT) is a compact, URL-safe string used to securely transmit claims between parties. JWTs are commonly used for authentication and authorization in web APIs, single sign-on (SSO), and microservices.

How to use

How to Decode JWT Token Using This Tool?

1. 1

   Open the Decode Tab and Input JWT Token

   Switch to Decode and paste your JWT token into the input field. The tool loads with a sample token so you can see how it works.

2. 2

   Inspect Header and Payload

   The decoded header shows the algorithm (alg) and token type (typ). The payload shows claims like sub, name, exp, and any custom fields as formatted JSON.

   
3. 3

   Verify the Signature (Optional)

   Enter your HMAC secret key in the verification field and click Verify Signature to check whether the token was signed with HS256, HS384, or HS512.

4. 4

   Review Expiration Claims

   If the token includes exp, nbf, or iat claims, the tool displays human-readable dates and whether the token is expired or not yet valid.

5. 5

   Encode a New JWT

   Switch to the Encode tab, edit the header and payload JSON, choose an algorithm, enter a secret, and click Generate JWT to create a signed token.

   

Features

Benefits