JWT Claims Inspector Online
Free online helper that surfaces exp, nbf, aud, iss, and related JWT timing claims for auth debugging.
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Free online helper that surfaces exp, nbf, aud, iss, and related JWT timing claims for auth debugging.
How it works
This tool decodes JWT claims and highlights common validation rules. It helps debug token expiration, audience mismatches, and issuer problems.
Example
Input: (JWT) Output: exp: 1700000000 (expired) aud: api
FAQ
Does this verify signatures?
Signature verification requires the correct key. Claim checks alone do not guarantee authenticity.
Why do clocks cause JWT issues?
Clock skew between systems can make tokens appear not-yet-valid or expired. Some systems allow small leeway.
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