guides
How I Decode a JWT Without a Secret
Can I decode a JWT without knowing the signing secret?
Read guide →Knowledge base
JWT Guides
Practical explanations for decoding, validating and troubleshooting JSON Web Tokens.
JWT Guides guides
guides
How I Decode a JWT in JavaScript Without Trusting It
How do I decode a JWT correctly in JavaScript without confusing decoding with verification?
Read guide →
guides
How I Check the JWT exp Claim and Expiration Time
What does the JWT exp claim mean and how do I tell when a token expires?
Read guide →
guides
How I Read JWT Claims: iss, aud, exp, sub and More
What do the common claims inside a JWT mean?
Read guide →
guides
How I Debug a JWT Invalid Signature Error
Why does JWT signature verification fail even though the token decodes?
Read guide →
guides
How I Fix a JWT Expired Token Error
Why is my JWT expired and what is the correct way to fix it?
Read guide →
guides
How I Debug a JWT Audience Mismatch
Why does my API reject a JWT because of an audience mismatch?
Read guide →
guides
How I Debug a JWT 401 Unauthorized Error
Why does a JWT that looks correct still return 401 Unauthorized?
Read guide →
guides
How I Choose Between HS256 and RS256 for JWT Signing
What is the difference between HS256 and RS256 for JWT signing?
Read guide →
guides
How I Debug JWT kid and JWKS Key Selection
How do I debug JWT kid and JWKS key-selection problems?
Read guide →
guides
How I Debug JWT Issuer Validation and iss Mismatches
How do I validate a JWT issuer and debug iss mismatches?
Read guide →
guides
How I Debug JWT Key Rotation Without Breaking Verification
How do I rotate JWT signing keys without breaking verification for existing tokens?
Read guide →
guides
How I Handle JWT alg none Without Accidentally Trusting It
What does JWT alg none mean and when should an application reject it?
Read guide →
guides
How I Decide Between JWK and JWKS When Verifying JWTs
What is the practical difference between a JWK and a JWKS when verifying JWTs?
Read guide →