JWT Decoder

Decodes JSON Web Tokens locally, showing header, payload and signature without sending data to external servers. Perfect for authentication/API debugging.

How to use it: Paste the token into the dedicated field to inspect the claims and verify expiry and structure.

Decoding happens only in your browser.

Token preview

Paste a JWT to highlight header, payload and signature.

Decoded header 

    

    

      

        Decoded payload
        
      

      

      

    

    

      

        Signature (base64url)
      

      
    

  

  
No cryptographic signature verification is performed without a public key.