Development guide
JWT vs Sessions
JWT and session-based authentication are two of the most common ways to manage user identity in applications. They solve the same problem but use fundamentally different architectures with different trade-offs.
Quick comparison
| Aspect | JWT | Sessions |
|---|---|---|
| State | Stateless | Stateful |
| Storage | Client-side | Server-side |
| Scalability | High | Requires session store |
| Revocation | Harder | Easy |
| Security control | Token-based | Server-controlled |
JWT (token-based)
JWT authentication stores user data inside a signed token that is sent with each request. The server does not need to keep session state.
- Scales well across services
- No central session store required
- Good for APIs and microservices
- Harder to revoke tokens early
Sessions (stateful)
Session-based authentication stores user state on the server and uses a session ID (often in a cookie) to identify the user.
- Central control over sessions
- Easy to revoke access
- Simpler security model
- Requires session storage
When should you use JWT?
- Distributed systems or microservices
- API-first architectures
- Stateless backends
- Third-party integrations
When should you use sessions?
- Traditional web applications
- High need for control and revocation
- Simpler architectures
- Centralized backend systems
Common misconception
JWT is not automatically more secure than sessions. Security depends on implementation details such as storage, transport, expiry, and validation — not just the authentication model.