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Jest Config Generator

Visual Jest configuration builder with presets for Node.js, React, Vue, and Next.js. Configure test environment, coverage thresholds, transforms, and module mapping. Outputs jest.config.ts, .js, or .json. Runs entirely in your browser — your data never leaves your machine.

jest testing config javascript typescript code-generator

Published May 29, 2026

All interactive tools run entirely in your browser. Your data never leaves your device.

How It Works

Select a preset or configure from scratch. Choose the test environment, transforms, module name mappers, coverage settings, and behavioral flags. The tool generates a properly typed Jest configuration in your preferred format.

Features

  • 6 presets: Node.js + TypeScript, React + TypeScript, Vue.js + TypeScript, Node.js (JavaScript), Next.js, Strict Coverage
  • 3 output formats: jest.config.ts (typed), jest.config.js (CommonJS + JSDoc), jest.config.json
  • Test environments: node, jsdom, happy-dom
  • Transform configuration: map file patterns to transformers (ts-jest, vue3-jest, etc.)
  • Module name mapper: alias CSS/image imports to mocks or proxies
  • Coverage thresholds: configurable lines, branches, functions, statements percentages
  • Behavior flags: verbose, clearMocks, restoreMocks, testTimeout
  • Setup files: configure pre-test and post-framework setup scripts
  • Private: runs entirely in the browser — no data transmitted

Use Cases

  • Setting up Jest for new TypeScript or JavaScript projects
  • Configuring test environments for React, Vue, or Next.js
  • Enforcing coverage thresholds across teams
  • Learning Jest configuration options and patterns