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JWT Decoder & Debugger

Decode, verify, and inspect JSON Web Tokens (JWT) securely in your browser.

Header (Algorithm & Type) 

                

            

        

        

            

                

                    Payload (Data)
                

                

                    

                

            

        

        

            

                

                    Timestamps
                

                

                    

                        Issued At (iat)
                        
                    

                    

                        Expires (exp)
                        
                        
                    

                

            

        

    




        

    
    
    

        

            

                
                

                    
                    
                                                                        

                                                                    

                                        

                                            
                                        

                                        
Introduction

                                    

                                                                

                                    

                                

                            

                            
                                                            

                                                                                

                                                                    

                                        

                                            
                                        

                                        
What is JWT Decoder & Debugger and How Does It Work?

                                    

                                                                

                                    
Decode, verify, and inspect JSON Web Tokens (JWT) securely in your browser.

  
Here are some of the primary reasons developers use this tool:

  
    
    
  • Inspect claims (payload) inside a JWT.
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  • Verify JWT signatures with a secret key.
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  • Debug authentication issues quickly.
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Step-by-Step Guide: How to Use Jwt Decoder

                                    

                                                                

                                    
    
    
  1. Paste your JWT (Header.Payload.Signature).
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  2. Instantly view the decoded JSON header and payload.
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  3. Provide the secret key if you wish to verify the signature.
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  4. Check the token's expiration date.
    5. 
  

                                

                            

                            
                                                            

                                                                                

                                                                    

                                        

                                            
                                        

                                        
Key Features & Privacy Guarantees

                                    

                                                                

                                    
    
    
  • Supports HS256, RS256 algorithms
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  • No tokens are logged or sent to servers
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  • Automatic timestamp-to-date conversion for 'exp' and 'iat'
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Frequently Asked Questions

                            

                            
                            

                                                                    

                                        

                                            
                                        

                                        

                                            

                                                Yes, decoding happens entirely in your browser. We never transmit or store your tokens.
                                            

                                        

                                    

                                                                    

                                        

                                            
                                        

                                        

                                            

                                                Yes, by entering your secret key or public certificate, the tool will mathematically verify if the signature is valid.