JWT Decoder

Decode, inspect, and validate JSON Web Tokens with header analysis, payload inspection, expiry checking, and token generation.

Ctrl/⌘ + , to toggle options
Saved
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Algorithm
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Type
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Expires
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Status
HEADER 
 
 
 
 PAYLOAD  
 
 
 
 
 SIGNATURE  
 
 
 
   
         
 
 
  
 
 
  
 
 
◆ What it does
 
Decode JWT tokens to inspect header, payload, signature. Validate expiry, generate test tokens, and compare tokens side-by-side.
 
 
 
▸ How to use
 
     
  • Paste a JWT token in the input field
  • View decoded header, payload, and signature
  • Check token expiry and validity in the Info panel
  • Generate test tokens in the Generator tab
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▸ Why use this
 
     
  • Debug authentication issues quickly
  • Validate token claims and expiry
  • Generate test JWTs for development
  • No data sent to any server — fully client-side
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