Next.js Config Validator

Validate Next.js configuration files, check for deprecated options, and generate valid configs.

Paste your next.config.js content

reactStrictMode: true

Enables strict mode checks during development

swcMinify: true

Uses SWC for faster minification

Next.js 14+

Latest with App Router

Next.js 13

Pages & App Router

Validates Next.js configuration syntax and structure against Next.js official schema.

Detects deprecated options and suggests modern alternatives for version compatibility.

Checks for common configuration mistakes like invalid image domains or middleware setup.

Validates webpack, Babel, and other tool configurations nested within next.config.js.

Provides performance recommendations based on your current configuration settings.

Supports both CommonJS (module.exports) and ES Module (export default) config formats.