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JWT Decoder

Decode JSON Web Tokens (JWT) locally to view the header and payload claims safely without sending data to servers.


            

            

                
                

            

        

        














    
        
Decode JWT Tokens Securely

        
A JSON Web Token (JWT) is a compact URL-safe means of representing claims to be transferred between two parties. It is heavily used in web authentication and APIs. The token consists of three parts: a header, a payload, and a signature.

        
Our JWT Decoder allows you to parse and view the decoded header and payload sections of your token instantly. Because the decoding happens entirely in your browser using JavaScript, your sensitive token data is never transmitted to our servers, ensuring absolute privacy.

        
    
Часті запитання

    

        
        

            

                
            

            

                
No, this tool only decodes the Base64Url encoded header and payload. It does not verify the cryptographic signature since it does not ask for your secret key. It is strictly a token viewer.

            

        

        

            

                
            

            

                
Yes. The decoding is done 100% locally on your device (client-side). No data is sent over the network to any server.

            

        

        

            

                
            

            

                
A valid JWT must contain exactly three parts separated by dots (.). Make sure you have pasted the entire token without any missing characters or extra spaces.

            

        

    







    


    


    

        
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