ATR Parser

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Paste an ATR (Answer to Reset) hex string and decode every byte: initial character, format byte, interface bytes (TA/TB/TC/TD), historical bytes, and check character. Identify the card if possible.






  
  

    
    
    

      
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{# FAQ block + FAQPage JSON-LD. Expects `faq_items` = [{"question", "answer"}].
   Native 
/ (frontend-gold-standard §1.7): the answer text is in
   the initial HTML and stays reachable with JavaScript disabled, so crawlers and
   AI extractors read answer-shaped chunks without depending on Alpine. #}



  
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Are the smart card tools free to use?

        
      
      

        
Yes, all tools on SmartCardFYI are completely free with no account required. Tools run entirely in your browser (client-side JavaScript) and do not send your data to any server, ensuring privacy for sensitive information like APDU commands, ATR strings, or AID bytes.