Signature
The third segment of a JWT, created by signing header.payload with a secret (HS256) or private key (RS256). Proves integrity and authenticity.
Quick Answer
See our full JWT Glossary for related terms, or use the JWT Decoder to inspect tokens in practice.
What is Signature?
The third segment of a JWT, created by signing header.payload with a secret (HS256) or private key (RS256). Proves integrity and authenticity.
See It in Practice
Paste any JWT into our JWT Decoder to see related claims in action. Use the JWT Debugger for detailed analysis.
Related
Browse the full JWT Glossary or explore JWT Basics.
Signature in JWT Authentication
Understanding Signature helps you read RFC 7519, debug tokens, and design secure authentication. JWTs combine header, payload claims, and a cryptographic signature.
Browse related resources: JWT Decoder, JWT Validator, JWT Basics, JWT Authentication, JWT Errors, Algorithms, Glossary, and Learning Path.