CLI

Env File Diff

Compare two .env files side by side. Instantly see added, removed, changed, and unchanged variables with color-coded diff output and a merged result. Runs entirely in your browser — your data never leaves your machine.

env diff dotenv compare environment config

Published June 1, 2026

All interactive tools run entirely in your browser. Your data never leaves your device.

How It Works

Paste two .env files (e.g., development vs production, before vs after migration). The tool parses both files, matches variables by key, and shows a color-coded diff: green for added, red for removed, yellow for changed, gray for unchanged.

Features

Smart parsing: handles quotes (single/double), empty values, inline comments, whitespace
Color-coded diff: added (green), removed (red), changed (yellow), unchanged (gray)
Summary stats: count of added/removed/changed/unchanged variables at a glance
Merged output: generate a combined .env with change annotations
Filter toggle: show or hide unchanged variables to focus on differences
5 examples: dev vs prod, migration, missing vars, version upgrade, quoted values
Private: runs entirely in the browser — no data transmitted

Use Cases

Comparing development and production environment configurations
Finding missing variables before deploying to a new environment
Reviewing environment changes between releases
Auditing configuration drift across services
Merging .env.example updates into your local .env file