JWT Decoder
JWT decoder that splits a token into Header, Payload and Signature and reads claims, algorithm and expiry (exp). Tokens are never sent anywhere — decoding is free and safe in your browser.
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What is JWT Decoder?
JWT decoder that splits a token into Header, Payload and Signature and reads claims, algorithm and expiry (exp). Tokens are never sent anywhere — decoding is free and safe in your browser.
How to Use
- 1Enter JWT Token— Paste the JWT token into the input field. The Bearer prefix is automatically removed.
- 2View Decoded Result— Header and Payload are automatically decoded and displayed as JSON.
- 3Check Expiration— If an exp claim exists, the remaining time is displayed in real-time.
- 4Copy Sections— Use each section's copy button to copy Header or Payload JSON.
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Frequently Asked Questions
A JWT Decoder parses a JSON Web Token and displays the Header (algorithm), Payload (claims), and Signature separately.
No. This tool only decodes. Signature verification must be done on the server with the secret key.
Yes. Tokens can be decoded regardless of expiration, and the expired status is shown in red.
No. Tokens starting with 'Bearer ' are automatically stripped.
No. All decoding is done in the browser. Sensitive tokens can be checked safely.