JWT Decoder & Verifier

Decode JWT headers and claims, check timestamps, and verify HMAC-signed tokens.

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JWT Decoder & Verifier

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About this tool

JWT Decoder & Verifier decodes compact JWTs into readable JSON and verifies HMAC signatures when a shared secret is provided. Use it for token inspection, auth debugging, and safe claim review.

Input rules

Paste the compact JWT only. Remove Bearer and any surrounding authorization header text.

Verification requires the same shared secret and HMAC algorithm used to sign the token.

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Gotchas

Decoded claims are readable but not automatically trusted. Check signature verification before relying on any claim values.

Do not paste production secrets into places where they should not be exposed.

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Key use cases

  • -Inspect JWT headers and payload claims.
  • -Check exp, nbf, and iat time claims.
  • -Verify HS256, HS384, or HS512 signatures.
  • -Copy decoded JSON into tickets without retyping.

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