JWT

Part of the Full Stack Developer Roadmap.

Summary

JSON Web Tokens — a compact, signed token your backend issues after login and your frontend attaches to every subsequent request, letting a stateless server verify identity without a database lookup.

How to Learn This

1Generate a JWT on login and store it on the frontend, with a plan for where to keep it safely.
2Decode a real JWT at jwt.io and inspect its header, payload and signature.
3Attach the JWT as an `Authorization: Bearer` header on your frontend's API calls.

Sessions vs Tokens

OAuth 2.0 & Social Login

More topics in Authentication Across the Stack

Sessions vs Tokens OAuth 2.0 & Social Login Password Hashing Protected Routes (Frontend)Protected Routes (Backend)Role-Based Access Control Refresh Tokens

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