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JWT Decoder
Inspect JWT claims and expiration instantly
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Full guide
How to Decode a JWT and Read Its Claims
Learn JWT header, payload, and signature, Base64URL claims, expiration checks, and why decoding is not the same as verification.
About JWT Decoder
Decode any JSON Web Token (JWT) to inspect its header (algorithm, type), payload (claims, subject, issuer), and signature. Automatically checks token expiration, calculates time since issuance, and displays all fields in a formatted, color-coded view. No secret key needed for decoding.
JWT Decoder Features
- Header/payload/signature decode
- Expiration status check
- Copy decoded claims
- 100% private and client-side processing
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