- How do I verify a JWT token?
- Paste your JWT token, enter the secret key or public key used for signing, and the tool will verify the signature and show you the token's contents.
- What does JWT verification check?
- Verification checks the token's signature validity, ensures it hasn't been tampered with, and validates any expiration (exp) or not-before (nbf) claims if present.
- Why might a JWT verification fail?
- Common reasons include invalid signatures, expired tokens, incorrect secret keys, or tokens that aren't yet valid (based on nbf claim).
- Can I verify tokens signed with different algorithms?
- Yes, the tool supports verification of tokens signed with HMAC (HS256, HS384, HS512) and RSA (RS256, RS384, RS512) algorithms.
- Is the verification process secure?
- Yes, all verification is done locally in your browser. Your keys and tokens never leave your device.