TypeScript Config Generator Free Online Tool 2026

Last updated March 22, 2026

TypeScript Config Generator Examples

The TypeScript Config Generator creates customized tsconfig.json files for different project types. Below are practical examples for Node.js backends, React frontends, libraries, and strict configurations.

Node.js Backend (CommonJS)

{
  "compilerOptions": {
    "target": "ES2022",
    "module": "CommonJS",
    "moduleResolution": "node",
    "lib": ["ES2022"],
    "outDir": "./dist",
    "rootDir": "./src",
    "strict": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true,
    "resolveJsonModule": true,
    "declaration": false,
    "sourceMap": true
  },
  "include": ["src/**/*"],
  "exclude": ["node_modules", "dist", "**/*.test.ts"]
}

Node.js Backend (ESM)

{
  "compilerOptions": {
    "target": "ES2022",
    "module": "NodeNext",
    "moduleResolution": "NodeNext",
    "lib": ["ES2022"],
    "outDir": "./dist",
    "rootDir": "./src",
    "strict": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true,
    "resolveJsonModule": true,
    "sourceMap": true
  },
  "include": ["src/**/*"],
  "exclude": ["node_modules", "dist"]
}

React Frontend (Vite)

{
  "compilerOptions": {
    "target": "ES2020",
    "useDefineForClassFields": true,
    "lib": ["ES2020", "DOM", "DOM.Iterable"],
    "module": "ESNext",
    "moduleResolution": "bundler",
    "allowImportingTsExtensions": true,
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noEmit": true,
    "jsx": "react-jsx",
    "strict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noFallthroughCasesInSwitch": true,
    "skipLibCheck": true
  },
  "include": ["src"],
  "references": [{ "path": "./tsconfig.node.json" }]
}

TypeScript Library (npm Package)

{
  "compilerOptions": {
    "target": "ES2018",
    "module": "CommonJS",
    "moduleResolution": "node",
    "lib": ["ES2018"],
    "outDir": "./dist",
    "rootDir": "./src",
    "strict": true,
    "declaration": true,
    "declarationMap": true,
    "sourceMap": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true
  },
  "include": ["src/**/*"],
  "exclude": ["node_modules", "dist", "**/*.test.ts", "**/*.spec.ts"]
}

Strict Mode Configuration

{
  "compilerOptions": {
    // The 'strict' flag enables all of these:
    "strict": true,

    // Individual strict flags (enabled by 'strict'):
    "strictNullChecks": true,        // null/undefined must be handled explicitly
    "strictFunctionTypes": true,     // stricter function type checking
    "strictBindCallApply": true,     // stricter bind/call/apply checking
    "strictPropertyInitialization": true, // class properties must be initialized
    "noImplicitAny": true,           // error on implicit 'any' type
    "noImplicitThis": true,          // error on implicit 'this' type
    "alwaysStrict": true,            // emit 'use strict' in output

    // Additional strictness (not included in 'strict'):
    "noUnusedLocals": true,          // error on unused local variables
    "noUnusedParameters": true,      // error on unused function parameters
    "noImplicitReturns": true,       // error if not all paths return a value
    "noFallthroughCasesInSwitch": true, // error on switch fallthrough
    "exactOptionalPropertyTypes": true  // stricter optional property handling
  }
}

Path Aliases Configuration

{
  "compilerOptions": {
    "baseUrl": ".",
    "paths": {
      "@/*": ["src/*"],
      "@components/*": ["src/components/*"],
      "@utils/*": ["src/utils/*"],
      "@types/*": ["src/types/*"],
      "@hooks/*": ["src/hooks/*"],
      "@api/*": ["src/api/*"]
    }
  }
}

// Usage in code:
import { Button } from '@components/Button';
import { formatDate } from '@utils/date';
import type { User } from '@types/user';

// Note: Also configure your bundler (Vite/webpack) to resolve these aliases:
// vite.config.ts:
import { defineConfig } from 'vite';
import path from 'path';

export default defineConfig({
  resolve: {
    alias: {
      '@': path.resolve(__dirname, './src'),
      '@components': path.resolve(__dirname, './src/components'),
    }
  }
});

Incremental TypeScript Adoption (JS + TS)

{
  "compilerOptions": {
    "target": "ES2020",
    "module": "CommonJS",
    "allowJs": true,           // allow .js files
    "checkJs": false,          // don't type-check .js files yet
    "strict": false,           // start permissive
    "noImplicitAny": false,    // allow implicit any initially
    "skipLibCheck": true,
    "esModuleInterop": true,
    "outDir": "./dist",
    "rootDir": "./src"
  },
  "include": ["src/**/*"]
}

// Gradually increase strictness:
// Phase 1: allowJs: true, checkJs: false, strict: false
// Phase 2: allowJs: true, checkJs: true, strict: false
// Phase 3: allowJs: false, strict: true (all files converted to TS)

Monorepo Configuration

# Root tsconfig.json (base config)
{
  "compilerOptions": {
    "target": "ES2020",
    "module": "CommonJS",
    "strict": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true
  }
}

# packages/api/tsconfig.json (extends root)
{
  "extends": "../../tsconfig.json",
  "compilerOptions": {
    "outDir": "./dist",
    "rootDir": "./src",
    "declaration": true
  },
  "include": ["src/**/*"]
}

# packages/web/tsconfig.json (extends root)
{
  "extends": "../../tsconfig.json",
  "compilerOptions": {
    "lib": ["ES2020", "DOM"],
    "jsx": "react-jsx",
    "noEmit": true
  },
  "include": ["src/**/*"]
}

Target and Lib Reference

// Target: what JavaScript version to output
// ES5:    IE11, very old browsers (no arrow functions, no const/let)
// ES2015: Modern browsers, Node.js 6+
// ES2017: async/await natively
// ES2018: Rest/spread for objects
// ES2020: Optional chaining, nullish coalescing
// ES2022: Top-level await, class fields
// ESNext: Latest features

// Lib: what type definitions to include
// ES2020:     JavaScript standard library
// DOM:        Browser APIs (window, document, fetch)
// DOM.Iterable: Iterable DOM collections
// WebWorker: Web Worker APIs

Common Compiler Options Reference

• strict: enables all strict type-checking options
• target: JavaScript version for output
• module: module system (CommonJS, ESNext, NodeNext)
• moduleResolution: how modules are resolved (node, bundler, NodeNext)
• outDir: output directory for compiled files
• rootDir: root directory of source files
• declaration: generate .d.ts type declaration files
• sourceMap: generate source maps for debugging
• jsx: JSX handling (react-jsx, preserve)
• paths: module path aliases
• skipLibCheck: skip type checking of .d.ts files
• esModuleInterop: better CommonJS/ESM interoperability

Use the TypeScript Config Generator to select your project type and options, then get a complete, commented tsconfig.json ready to use.