Google Login in Express with PassportJS & JWT

In this blog, we will implement Google Authentication in an Express.js app using:

• TypeScript


• Express.js


• Mongoose


• Passport.js


• JWT Authentication

Project Structure

└── src/

    ├── config/

    ├── controllers/

    ├── middlewares/

    ├── models/

    ├── routes/

    ├── utils/

    ├── app.ts

    └── index.ts

├── .env

├── package.json

└── tsconfig.json

Install Required Packages

npm install passport passport-google-oauth20

npm install jsonwebtoken cookie-parser bcrypt mongoose



npm install -D @types/passport-google-oauth20

Create Google OAuth Credentials

Go to

2. Configure OAuth Consent Screen

5. Copy Client ID and Client Secret

http://localhost:3000/api/v1/auth/google

If configured correctly:

• Google login opens


• User account gets created


• JWT cookies are generated

Common Issues

Invalid Redirect URI

Ensure callback URL matches exactly in:

• Google Console


• .env


• Passport Strategy

Missing Email

Make sure scope contains:

scope: ["profile", "email"]

Production Tips

Use secure cookies in production:

secure: true,

httpOnly: true,

sameSite: "strict",

Final Thoughts

You now have Google Authentication working with:

• Express.js


• TypeScript


• Mongoose


• Passport.js


• JWT

You can further extend this with:

• GitHub OAuth


• Discord OAuth


• Role-based auth


• Email verification

Happy coding 🚀