JWT Debugger – Decode JSON Web Tokens Instantly

Paste a JWT to decode the header, payload, and see the signature. Perfect for developers.

Header (Algorithm & Type)


                
Payload (Data)

                

                
Signature (Verify only)

                

            

        


        

            
What is a JWT?

            
JSON Web Tokens are used for authentication and info exchange. They consist of three parts: header, payload, and signature. This tool decodes the first two parts (base64url) so you can inspect the claims.

        


        

            
FAQs

            
Can I verify the signature?
This tool only decodes – signature verification requires the secret key, which we never ask for.

            
Is my token stored?
No – all processing is local. Nothing leaves your browser.