envmatrix

Compare and edit multiple .env files side-by-side in a browser-based matrix view.

Each value is hashed to a color, so identical values across environments share a color and divergences pop out at a glance. Edits in the UI are written back to the original files, preserving comments, blank lines, and key order.

Install / Run

# one-shot, no install
npx envmatrix .env.local .env.dev .env.prod

# global
npm install -g envmatrix
envmatrix .env.local .env.dev .env.prod

# read-only HTML report (no server, shareable)
npx envmatrix .env.local .env.dev .env.prod --export report.html

Default mode starts a tiny local server, opens your browser, and lets you edit values, add new keys, and delete keys. Saves write back to the original files.

Features

• Color-coded hash cells — same value across files = same color
• Toggle SHA / values — values masked by default
• Filter — search by key, "differs only", "missing in some env"
• Edit / add / delete — round-trips back to disk preserving file structure
• Status pill per row — same / differs / partial
• Zero runtime dependencies

Why

Existing tools (dotenv-diff, EnvDiff) compare .env against .env.example for consistency checks. None give you an N-way visual matrix across local, dev, prod with editing.

License

MIT