Express JS Generator starter
Fast, accurate and free online starter express js generator tool running directly in your browser.
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1Enter data
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2Click the button
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3Get the result
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Configuring a new Express.js project from scratch takes hours: routing, middleware, error handling, database connection, authorization, validation, tests. The tool generates a ready-made directory structure with the selected set of technologies and you download the packed ZIP project.
Available project configurations
Language: JavaScript (ES2022) or TypeScript (strict mode, ts-node). Framework: Express 4/5. Database: MongoDB (Mongoose), PostgreSQL (Sequelize/TypeORM/Prisma), MySQL (Sequelize), SQLite (dev/test). Auth: JWT (jsonwebtoken), OAuth2 (Passport.js), Session (express-session). Validation: Zod, Joi, express-validator.
Directory structure
src/controllers/ – endpoint logic. src/routes/ – router definitions. src/models/ – database schemas. src/middleware/ – auth, error handling, rate limiting. src/services/ – business logic. src/utils/ – helpers. src/config/ – env configuration. tests/ – unit and integration tests. .env.example, Dockerfile, docker-compose.yml.
Middleware default in template
helmet: security headers (HSTS, X-Frame, CSP). cors: CORS configuration from whitelist. express-rate-limit: DDoS/brute-force protection. morgan: HTTP request logging. compression: gzip/brotli replies. express.json() + express.urlencoded(): parse body. Own error handler (404 + 500).
TypeScript configuration
tsconfig.json: strict: true, target: ES2022, moduleResolution: Node16. ts-node-dev (dev) + tsc (production). Path aliases (@/controllers → src/controllers). Typed env (from the schema for process.env). Automatically generating types from Prisma schema.
Frequently asked questions
Express 4 or Express 5?
Express 5 (stable from 2024): async/await in route handlers without try/catch (automatic Promise rejection support), improved path matching (regexp), removed obsolete methods (res.send(status)). Express 4: the widest ecosystem and documentation. The tool offers both.
How to structure large REST APIs in Express?
Modular routing: separate router file per domain (usersRouter, productsRouter). Controller → Service pattern: controller parses HTTP, service contains logic. Repository pattern: an abstraction layer above the base. Dependency injection (TypeDI): for testability. OpenAPI: generate documentation from code (swagger-jsdoc + swagger-ui-express).
How to add rate limiting to Express?
npm install express-rate-limit. Global: app.use(rateLimit({ windowMs: 15*60*1000, max: 100 })). Endpoint-specific: higher limit for /api/login, lower for /api/send-email. IP-based or user-based (after logging in). Redis store for multi-instance (rate-limit-redis).
How to test API Express?
Supertest: HTTP assertions without running the server. There is + Supertest: describe("POST /users", () => { it("creates user", () => request(app).post("/users").send({...}).expect(201)) }). Integration tests with the test database (SQLite or docker-compose test profile). Coverage: is --coverage.
How to deploy Express on VPS/cloud?
PM2: process manager (auto-restart, cluster mode). Dockerfile: node:20-alpine + npm ci --production. docker-compose + nginx reverse proxy + Let's Encrypt. Railway/Render/Fly.io: automatic deploy from Git. GitHub Actions: build → push Docker image → deploy.
Related tools: GitLab CI/CD generator, JSON validator, and test JSON API generator.