envdiff

Zero-dependency Python CLI that compares two or more dotenv-style files. It reports keys missing from each file and keys whose values differ. Values are hidden by default, so output is safe to paste into chats and CI logs.

Usage

python3 envdiff.py a.env b.env
python3 envdiff.py a.env b.env c.env --json
python3 envdiff.py a.env b.env --keys-only      # ignore value differences
python3 envdiff.py a.env b.env --show-values    # reveal values

Exit code is 1 if any difference exists, 0 otherwise, so it works in CI. Handles comments, blank lines, export prefixes, quoted values and trailing # comments.

Tests

python3 -m unittest -v

MIT licensed.