.env.local.production [repack] Jun 2026

In Next.js, variables that are not prefixed with NEXT_PUBLIC_ are only available during the build step. If you need a variable in the browser, use NEXT_PUBLIC_API_URL . 4.

In the end, .env.local.production is a niche tool for a specific job: Treated with respect and used sparingly, it is a powerful addition to your config arsenal. Treated carelessly, it is a liability waiting to leak secrets.

If you need to change a variable without rebuilding, do not use .env.local.production . Use a runtime configuration API instead. .env.local.production

NODE_ENV=production npm run build

To help me tailor this information or provide specific code snippets, tell me: In Next

Commit an .env.example file to your repository. This file should list every environment variable your application needs, with placeholder values and no secrets. This serves as documentation for new developers and for your CI/CD system.

: It is primarily used to store sensitive data like API keys , database passwords , and cryptographic secrets on a specific production or staging server. In the end,

You run:

It is notoriously difficult to know which env file is active. Here is how to check.