TOOL-16 · Security

JWT decoder

Paste a JSON Web Token to inspect its header, payload, and claims. Runs entirely in your browser — nothing is sent anywhere.

Note: This tool decodes and displays the token contents only. Signature verification is not performed — treat decoded claims as unverified until validated server-side.

JWT token

Header


  


  
  

    

      
Payload

      

        No exp claim
        
      

    

    

    
  


  
  

  
Client-side only · No data sent