Jest Config Generator

Set up Jest testing in seconds. Choose your test environment and options below, and this free generator will produce a valid Jest configuration object for your project.

Test environment: Collect coverage (collectCoverage) Verbose output (verbose) Test match pattern:

Jest config (JSON)

How to Use

Pick node for backend or jsdom for browser-like testing.
Toggle coverage collection and verbose output.
Adjust the test match pattern if your tests live elsewhere.
Copy the JSON into your package.json under the “jest” key, or save as jest.config.json.

Key Features

Covers the most common Jest options.
Live JSON preview as you change settings.
Valid JSON output ready to paste.
Runs entirely in your browser.
Free with no sign-up.

FAQs

What is Jest?
Jest is a popular JavaScript testing framework maintained by Meta, widely used with React and Node projects.

node or jsdom?
Use node for APIs and backend code, jsdom when your tests need a browser-like DOM.

Where does the config go?
Put it in package.json under a “jest” key, or in a standalone jest.config.json file.