JWT Decoder

Read the header and payload inside any token — decoded only, never verified.

FREE TOOL · WORKS OFFLINE · NO SIGN-UP

Decodes only. This tool never verifies the signature, and you should never paste a real production token here.


    
    

    
Results update instantly as you type.

  


  

    

      
Token parts
0

      
Signature check
Never verified

    

    

  


  

    
How to Use This JWT Decoder

    
    
      
  1. 1.Paste the whole token. All three parts separated by dots: header, payload, signature.
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  2. 2.Read the header. It shows the signing algorithm and token type.
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  3. 3.Read the payload. It shows the claims inside the token, like subject and issued-at time.
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  4. 4.Ignore the signature here. It is shown as present or missing only — this tool never checks it.
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  5. 5.Use test tokens only. Never paste a real production token into any online decoder.
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FAQ

    
Does this JWT decoder verify the signature?

    
No. This tool decodes only and never verifies the signature. A decoded payload proves nothing about who issued the token — only a real signature check with the correct key can do that.

    
What are the three parts of a JWT?

    
A JWT has a header, a payload and a signature, separated by dots. The header names the algorithm, the payload holds the claims, and the signature is meant to prove the token was not tampered with.

    
Why should I not paste a real token here?

    
Because anyone holding your token can act as you until it expires. Only decode test tokens, and treat any real token like a password.

    
Is this JWT decoder free?

    
Yes — 100% free, no sign-up, no limits. Everything runs in your browser; none of your numbers are uploaded or saved.

  


  
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