JWT Decoder

Decode and inspect JSON Web Tokens. View header, payload, claims, and expiration status instantly.

Client-Side Only — Your tokens never leave your browser
Paste JWT Token
HEADER Algorithm & Token Type Copy 

    


    

      

        PAYLOAD Claims & Data
        Copy
      

      

    


    

      

        SIGNATURE Verification Data
        Copy
      

      

    


    
  


  

    
Quick Examples

    

      

        
Basic JWT

        
Simple token with name and admin claims

      

      

        
Expired Token

        
Token with past expiration date

      

      

        
API Key Token

        
Token with scopes, rate limits, and issuer

      

      

        
RS256 Token

        
RSA-signed token with kid header

      

    

  


  

    
What is a JWT?

    
A JSON Web Token (JWT) is a compact, URL-safe token format used for securely transmitting information between parties. JWTs are commonly used for authentication and authorization in web applications and APIs.

    
A JWT consists of three parts separated by dots (.):

    
Header contains the token type and signing algorithm (e.g., HS256, RS256). Payload contains the claims (data) such as user ID, expiration time, and custom fields. Signature verifies the token hasn't been tampered with.

    
Common JWT Claims

    
iss (Issuer) identifies who issued the token. sub (Subject) identifies the principal. aud (Audience) identifies the intended recipients. exp (Expiration) is when the token expires. nbf (Not Before) is the earliest time the token is valid. iat (Issued At) is when the token was created. jti (JWT ID) is a unique identifier for the token.

    
Build APIs with JWT Auth

    
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