🛠️DevTools

JWT Viewer

View JWT token contents in a clean, readable format. Perfect for quickly checking what's inside a JWT without writing code.

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💡 Tip: JWT tokens consist of three parts: Header (algorithm info), Payload (claims/data), and Signature (verification). This tool decodes the header and payload but cannot verify signatures without the secret key.

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Frequently Asked Questions

What claims should I look for?

Common claims include: sub (subject), iss (issuer), aud (audience), exp (expiration), iat (issued at), and nbf (not before).

Can I see custom claims?

Yes, all claims in the payload are displayed, including any custom claims added by your application.

Related Tools

JWT DecoderJWT EncoderJWT ParserJWT DebuggerJWT Decoder & Encoder (Full Tool)

📚 Learn More

What is JWT (JSON Web Token)?
Learn what JWT (JSON Web Token) is, how it works, why it's used for authentication, and see examples in JavaScript, Python, and more. Complete beginner-friendly guide.
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