.env · workflow

ENV Merger

Merge .env.base with .env.local and environment overrides. Configurable precedence and conflict resolution.

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later files override earlier ones

merged result

NODE_ENV=development
PORT=3000
DATABASE_URL=postgres://localhost/local
DEBUG=true

source of each key

NODE_ENV.env.base
PORT.env.base
DATABASE_URL.env.local
DEBUG.env.local

What it does

▸Merges any number of .env files in order
▸Later files override earlier ones (standard dotenv behavior)
▸Shows which keys came from which file
▸Copy or download the merged output
▸100% client-side

Privacy

Runs 100% in your browser. Your .env never touches our servers.

client-side only

ENV Merger — combine multiple .env files

Most dotenv libraries load files in order — .env.base, then .env.local, then .env.development — with each layer overriding the previous. This tool mirrors that behavior in the browser so you can preview the final merged config before shipping.

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guide · 6 min

How to use dotenv in Node.js, Next.js, and Django

Step-by-step examples for loading .env files with dotenv in Node.js, Next.js (App Router), Python/Django, Rails, and Laravel. Includes load order and override rules.

coming soon

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