dotenv-diff CLI – Validate environment variable usage in your codebase

Summary: dotenv-diff CLI scans codebases to detect environment variable references, identifying missing, unused, duplicated, and misused variables to prevent runtime errors. It supports SvelteKit, Next.js, and other modern JavaScript/TypeScript frameworks.

What it does

It analyzes code to find all environment variable usages and compares them against env files to highlight inconsistencies.

Who it's for

Developers working with JavaScript/TypeScript projects using frameworks like SvelteKit, Next.js, Node.js, Nuxt, or Vue.

Why it matters

It prevents runtime errors caused by environment variable mismatches in development environments.