JWT Authentication Explained | MERN Stack Series #6

This is Video 6 of the REST API Mastery series — where I explain JWT (JSON Web Token) Authentication in depth, the most commonly asked authentication topic in backend interviews. In this video, I cover: ✅ What JWT actually is (Header, Payload, Signature explained simply) ✅ The complete JWT authentication flow — from login to protected routes ✅ JWT vs traditional Session-based authentication ✅ Where you should store a JWT (localStorage vs httpOnly cookie) ✅ Why JWT is called "stateless" authentication 📄 Free easy-English handwritten-style PDF notes for this video are linked below — perfect for quick revision before interviews. 🎯 What's covered in this series: 1. REST API Basics 2. HTTP Methods & Status Codes 3. Core REST Principles 4. Security Basics 5. HTTP Request & Response 6. JWT Authentication (this video) 7. Access Token & Refresh Token 8. OAuth 2.0 9. Rate Limiting 10. REST API Best Practices 11. Testing & Documentation 👉 Perfect for BCA / MERN stack students preparing for backend placements. 🔔 Subscribe and turn on notifications so you don't miss any video in this series. 💬 Comment your doubts — I reply to every comment. — 📂 Free PDF Notes: [] 📂 Full Playlist: [] 📂 Watch Video 5 (HTTP Request & Response): [] #RESTAPI #MERNStack #JWT #BackendDeveloper #WebDevelopment #CodingInterview #PlacementPreparation #JavaScript #NodeJS #ExpressJS #MongoDB #ReactJS #TechInterview #CodeWithHardeep #ComputerScience