What is JWT? Json Web Token Explained and Coded from Scratch | NodeJS, Express, JSON WEB TOKEN

JWT Explained in Telugu 🔐 Understand how JSON Web Token works, its structure, real login flow, and the biggest problem with JWT. Commands Used: npm init npm install express jsonwebtoken cors body-parser Websites visited in this Video: https://www.jwt.io/ https://www.epochconverter.com/ In this video, we clearly explain JSON Web Token (JWT) from scratch using a real-world scenario. If you are confused about: What JWT actually is Why JWT is used after login How JWT works between client and server JWT structure (Header, Payload, Signature) Why JWT alone is not enough What major problem exists with JWT Then this video is for you. 📌 Topics covered in this video: What is JWT? (JSON Web Token) Why we use JWT Structure of JWT (Header.Payload.Signature) How JWT works (client ↔ server flow) Role-based access example (Student / Faculty) Major issue with JWT (cannot revoke) Why Refresh Token is required (intro) 📄 FREE NOTES USED IN THIS VIDEO: I have shared my complete JWT notes (PDF) that I used while explaining this video. 👉 Checkout our Telegram channel for Resources: Telegram: https://t.me/tech_jashwanth Instagram:   / tech_jashwanth   Youtube:    / @techjashwanth   Learn Github from scratch:    • Complete Git and GitHub Tutorial for Begin...   (🔥100K+ Views) Learn Node:    • Learn Node JS & Express with a Real Projec...   (🔥**50K+ Views**) Learn ReactJS:    • React JS Tutorial for Beginners (2025) 🔥📝 ...   (🔥**50K+ Views**) Download Node Here: https://nodejs.org/en/download Node Modules: https://nodejs.org/docs/latest/api/ Learn NodeJS from scratch:    • Learn Node JS & Express with a Real Projec...   ReactJS part 2:    • ReactJS Basics in Telugu 🔥 | useState, use...   ReactJS Playlist:    • Blogging Website Project 2025🔥🔥| ReactJS a...   Full-stack web development Playlist:    • 🔥 Full-stack Web Development Tutorials for...   Build an expense tracker:    • Expense Tracker | Front-end Project   What is an API:    • What are APIs for beginners - Explained in...   Github from scratch:    • Complete Git and GitHub Tutorial for Begin...   These notes include: Diagrams Step-by-step JWT flow Interview-friendly explanations 🚀 This is PART 2 of Authentication Series Previous video: Login Explained Next video: Refresh Token Explained in Telugu 👍 If this video helped you, LIKE & SUBSCRIBE for backend content in Telugu. timestamp: 00:54 Understanding JWT 06:00 JWT Structure 07:40 How JWT Works? 11:00 Implementing JWT in NodeJS 24:50 JWT Header, Payload and Signature 33:44 Middleware 45:05 JWT Drawbacks 47:55 Code Summary #JWTExplained #BackendTelugu #authenticationmethods #JWTExplained #JSONWebToken #JWTTelugu #BackendTelugu #AuthenticationTelugu #NodeJSTelugu #WebDevelopmentTelugu #FullStackTelugu #ProgrammingTelugu #DeveloperTelugu