Decode and inspect JWT tokens. View header, payload, expiration.
Paste any JWT and click Decode to see the header algorithm, payload claims, and signature in formatted JSON. The tool also checks the exp claim and shows whether the token is still valid or has expired.
JWT decoding runs entirely in your browser using the built-in atob function. No token is ever sent to a server, making this safe for development and debugging workflows.
Remember that decoding a JWT does not verify its signature. Always verify tokens server-side using your signing key before trusting the claims.
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