evnx

A CLI tool for managing .env files — validation, secret scanning, format conversion, and migration to cloud secret managers.

Website | Getting Started | Changelog

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Why evnx?

Accidentally committing secrets to version control is one of the most common and costly developer mistakes. evnx is a local-first tool that catches misconfigurations, detects credential leaks, and converts environment files to the format each deployment target expects — before anything reaches CI or production.

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Testing & playground

→ urwithajit9/evnx-test — try evnx in your browser via GitHub Actions, no installation required.

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Installation

Linux / macOS

curl -sSL https://raw.githubusercontent.com/urwithajit9/evnx/main/scripts/install.sh | bash

Homebrew (macOS and Linux)

brew install urwithajit9/evnx/evnx

npm

npm install -g @evnx/cli

pipx (recommended for Python environments)

pipx install evnx

pipx installs CLI tools into isolated environments and wires them to your system PATH automatically. It is the correct tool for installing Python- distributed CLI binaries like evnx.

Don't have pipx?

macOS

brew install pipx
pipx ensurepath

Ubuntu / Debian (Python 3.11+)

sudo apt install pipx
pipx ensurepath

On older Ubuntu (20.04 and below) where pipx is not in apt:

pip install --user pipx
python -m pipx ensurepath

Note: pip install evnx will fail on Ubuntu 22.04+ with an "externally managed environment" error (PEP 668). This is intentional — Ubuntu protects the system Python. Use pipx instead.

Windows

python -m pip install --user pipx
python -m pipx ensurepath

After running ensurepath, close and reopen your terminal (a full logout/login may be required for PATH changes to take effect), then:

pipx install evnx

After installing pipx on any platform, restart your terminal and run:

pipx install evnx
evnx --version

Cargo

cargo install evnx
# with all optional features
cargo install evnx --all-features

Windows

Scoop (user-local, no admin required)

scoop bucket add evnx https://github.com/urwithajit9/scoop-evnx
scoop install evnx

Winget (system-wide)

winget install urwithajit9.evnx

Cargo (Windows)

Install Rust first, then:

cargo install evnx
evnx --version

Verify

evnx --version
evnx --help

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Commands

evnx init

Interactive project setup. Creates .env and .env.example files for your project through a guided TUI.

evnx init

Running evnx init launches an interactive menu with three modes:

How do you want to start?
  Blank      — create empty .env files
  Blueprint  — use a pre-configured stack (Python, Node.js, Rust, Go, PHP, and more)
  Architect  — build a custom stack by selecting services interactively

There are no flags required. The interactive flow handles stack and service selection inside the TUI.

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evnx add

Add variables to an existing .env file interactively. Supports custom input, service blueprints, and variable templates.

evnx add                          # interactive
evnx add service postgresql       # a known service, non-interactively
evnx add framework nextjs

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evnx spec

Declares what each variable is — something .env.example cannot express. Written into [vars] in .evnx.toml, and read by validate, scan and sync.

evnx spec init                    # infer the contract from files you already have

[vars]
PORT = { format = "port", description = "HTTP listen port" }

[vars.TENANT_A]
secret = true                     # scan reports it; no heuristic could
environments = ["production"]     # required in production only

secret = true reports a credential whose name gives nothing away. secret = false retracts a guess made from a variable's name — but never a match on its value, so a variable holding sk_live_… is still reported however it is declared.

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evnx validate

Validates your .env file for common misconfigurations before deployment.

evnx validate                            # pretty output
evnx validate --strict                   # exit non-zero on warnings
evnx validate --format json              # machine-readable output
evnx validate --format github-actions    # inline GitHub annotations

Detects: missing required variables, placeholder values (YOUR_KEY_HERE, CHANGE_ME), the boolean string trap (DEBUG="False" is truthy in most runtimes), weak secret keys, localhost in production, and suspicious port numbers.

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evnx scan

Scans files for accidentally committed credentials using pattern matching and entropy analysis.

evnx scan                              # scan current directory, recursively
evnx scan src/ config/                 # specific paths (positional, repeatable)
evnx scan --severity high              # only what evnx is confident about
evnx scan --pattern 'ACME-[A-Z0-9]{32}'  # your own secret format
evnx scan --format sarif               # SARIF for the GitHub Security tab
evnx scan --exit-zero                  # warn but do not fail CI

Detects: AWS Access Keys, Stripe keys (live and test), GitHub tokens, OpenAI and Anthropic API keys, RSA/EC/OpenSSH private keys, high-entropy strings, and generic API key patterns — plus any format you declare with --pattern or [[scan.patterns]].

Exit codes are 0 clean, 1 secrets found, 2 the scan could not be completed. 2 is not a louder 1: "I found nothing" and "I could not look" are different answers. --exit-zero suppresses 1 only.

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evnx diff

Compares .env and .env.example and shows what is missing, extra, or mismatched.

evnx diff                     # compare .env vs .env.example
evnx diff --show-values       # include actual values
evnx diff --reverse           # swap comparison direction
evnx diff --format json       # JSON output

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evnx convert

Converts your .env file to 14+ output formats for various deployment targets.

evnx convert --to json
evnx convert --to yaml
evnx convert --to shell
evnx convert --to docker-compose
evnx convert --to kubernetes
evnx convert --to terraform
evnx convert --to github-actions
evnx convert --to aws-secrets
evnx convert --to gcp-secrets
evnx convert --to azure-keyvault
evnx convert --to heroku
evnx convert --to vercel
evnx convert --to railway
evnx convert --to doppler

Advanced filtering and transformation:

evnx convert --to json \
  --output secrets.json \
  --include "AWS_*" \
  --exclude "*_LOCAL" \
  --prefix "APP_" \
  --transform uppercase \
  --base64

Pipe directly to AWS Secrets Manager:

evnx convert --to aws-secrets | \
  aws secretsmanager create-secret \
    --name prod/myapp/config \
    --secret-string file:///dev/stdin

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evnx sync

Keeps .env and .env.example aligned, in either direction.

# Forward: .env → .env.example (document what you have)
evnx sync --direction forward --placeholder

# Reverse: .env.example → .env (generate env from template)
evnx sync --direction reverse

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evnx migrate (requires --features migrate)

Migrates secrets directly to cloud secret managers.

# GitHub Actions secrets
evnx migrate --from env-file --to github-actions \
  --repo owner/repo --github-token $GITHUB_TOKEN

# AWS Secrets Manager
evnx migrate --to aws-secrets-manager --secret-name prod/myapp/config

# Doppler (with dry run)
evnx migrate --to doppler --dry-run

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evnx doctor

Runs a health check on your environment configuration setup.

evnx doctor                          # check current directory
evnx doctor --path /path/to/project

Checks: .env exists and has secure permissions, .env is in .gitignore, .env.example is tracked by Git, and project structure detection.

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evnx template

Generates configuration files from templates using .env variable substitution.

evnx template \
  --input config.template.yml \
  --output config.yml \
  --env .env

Supported inline filters:

database:
  host: {{DB_HOST}}
  port: {{DB_PORT|int}}
  ssl:  {{DB_SSL|bool}}
  name: {{DB_NAME|upper}}

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evnx backup / evnx restore (requires --features backup)

Creates and restores AES-256-GCM encrypted backups using Argon2 key derivation.

evnx backup .env --output .env.backup
evnx restore .env.backup --output .env

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Working with multiple environments

--env-name resolves .env.<name> across validate, scan, diff, sync, convert, backup and template:

evnx validate --env-name production            # operates on .env.production
evnx diff --env-name production --against staging

A name whose file does not exist is an error listing the ones that do — it never quietly falls back to .env. Set a project default with [defaults] env_name in .evnx.toml.

Comparing two real environments is the useful diff; the default compares against the template, where every filled-in value differs by construction.

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Cloud sync (requires --features cloud)

Push your .env to the cloud and pull it on any machine or in any pipeline — with the server mathematically unable to read it.

Encryption and decryption happen on your machine. The server stores ciphertext and holds no key that can open it: not with full database access, not with a court order, not after a breach.

evnx auth register                       # create an account
evnx auth login                          # sign in on this machine
evnx vault create app --env production   # a vault holds one .env, versioned
evnx cloud link app/production           # bind this directory to it
evnx cloud push                          # encrypt locally, upload ciphertext
evnx cloud pull                          # download, decrypt, write .env

Installing with cloud support

The prebuilt binaries already include the cloud commands. npm, PyPI, Homebrew, Scoop, winget and the GitHub Release are all built with --all-features, so if you installed evnx any of those ways, evnx cloud --help already works.

cargo install is the one exception, because it compiles from source with default = []:

cargo install evnx --features cloud

⚠️ If you already installed evnx another way, check which binary you are running. A package-manager install often sits earlier in PATH than ~/.cargo/bin, so cargo install appears to succeed while the old binary still answers — and evnx vault list reports "unrecognized subcommand".

which -a evnx     # if ~/.cargo/bin/evnx is not first, that is why

What the server can and cannot see

Sent to the server	Never sent
Ciphertext — AES-256-GCM, encrypted before upload	Your .env values
Your key names (DATABASE_URL, STRIPE_KEY) so a listing can show what a vault holds	Your master password
An SRP-6a verifier, which proves knowledge of the password without revealing it	Your master key, or any vault key in usable form

Key names travelling in the clear is a deliberate trade for a usable listing. If a name is itself sensitive, do not make it a name.

There is no password reset. The server holds only ciphertext, so nobody — including us — can recover an account whose master password is lost. Enable a second factor and keep your recovery codes:

evnx auth totp enable

Versioning and rollback

Every push is a new version. Nothing is overwritten.

evnx cloud history                  # what changed, when, and who pushed it
evnx cloud pull --version 3         # restore an earlier version

If someone else pushed since you last pulled, your push is refused with a conflict rather than silently overwriting them. Pull, re-apply, push again — the version number is authenticated into the ciphertext, so the same bytes cannot simply be re-sent.

Running a command without writing a file

evnx cloud run --vault app/production -- ./deploy.sh
evnx cloud run --include 'NEXT_PUBLIC_*' -- npm run build

Decrypts in memory and hands the variables to the child process. Nothing on disk, nothing in shell history, and nothing in ps — values travel in the environment block, never the argument vector. The child's exit code comes back unchanged, so a pipeline can branch on it.

--include / --exclude narrow what the child sees; a filter that matches nothing is an error rather than a silent run with zero secrets.

⚠️ This removes the plaintext file, not the master password. The vault key is wrapped under your master key, so decryption needs it wherever the command runs. In CI, feed it with --password-stdin.

Sharing with a team

evnx vault share app/production --with teammate@example.com --role developer
evnx vault members app/production
evnx vault role app/production --user teammate@example.com --role viewer
evnx vault revoke app/production --user teammate@example.com

The vault key is wrapped for the recipient with a hybrid X25519 + ML-KEM-768 scheme, so a share is not opened by a future quantum computer harvesting today's traffic. There is no X25519-only path; sharing with an account that has no ML-KEM key on file is refused rather than downgraded.

Revocation re-keys the vault, so a removed member cannot open versions pushed after they left.

⚠️ The recipient's public keys come from the server. Out-of-band fingerprint verification is not built, so "the server cannot read your secrets" becomes "…cannot read them passively" the moment you share.

CI/CD

Mint a token scoped to one vault, read-only:

evnx auth token create ci --scope read --vault app/production --expires-in-days 90

Then in the pipeline:

export EVNX_TOKEN=evnx_tok_...
echo "$EVNX_PASSWORD" | evnx cloud pull --vault <VAULT_ID> --password-stdin

Two things to understand:

• The token authenticates; it does not decrypt. The master password is still required, and it is the more sensitive of the two. What the token buys is blast radius: scoped to one vault and read, it reaches that vault and nothing else.
• Use the vault id, not name/environment. A vault-scoped token is refused permission to list vaults — by design — so it cannot resolve a name. Get the id from evnx vault list --verbose.

Pipe the password rather than exporting it where you can: an environment variable is visible in process listings and tends to end up in logs.

Self-hosting

evnx cloud talks to https://api.evnx.dev by default. Point it anywhere:

evnx cloud status --server https://evnx.internal.example

or set EVNX_SERVER, or server = "..." in ~/.config/evnx/config.toml. The server is open source and ships a Docker stack. Plain http:// is refused for anything but a loopback address, because tokens travel in request headers.

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CI/CD Integration

GitHub Actions

name: Validate environment

on: [push, pull_request]

jobs:
  validate:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Install evnx
        run: |
          curl -sSL https://raw.githubusercontent.com/urwithajit9/evnx/main/scripts/install.sh | bash

      - name: Validate configuration
        run: evnx validate --strict --format github-actions

      - name: Scan for secrets
        run: evnx scan --format sarif > scan-results.sarif

      - name: Upload SARIF
        uses: github/codeql-action/upload-sarif@v3
        if: always()
        with:
          sarif_file: scan-results.sarif

GitLab CI

validate-env:
  stage: validate
  image: alpine:latest
  before_script:
    - apk add --no-cache curl bash
    - curl -sSL https://raw.githubusercontent.com/urwithajit9/evnx/main/scripts/install.sh | bash
  script:
    - evnx validate --strict --format json
    - evnx scan --format sarif > scan.sarif
  artifacts:
    reports:
      sast: scan.sarif

pre-commit / prek Integration

Use evnx as automatic git hooks via pre-commit or prek — no manual evnx install needed. The binary is compiled and cached automatically on first run.

Add to .pre-commit-config.yaml:

default_install_hook_types: [pre-commit, pre-push]

repos:
  - repo: https://github.com/urwithajit9/evnx
    rev: v0.5.0
    hooks:
      - id: evnx-scan        # blocks commit if secrets found
      - id: evnx-validate    # blocks commit if .env misconfigured
      - id: evnx-diff        # warns on .env/.env.example drift
      - id: evnx-scan-push   # strict scan on push

Then install:

pre-commit install   # or: prek install

That's it. On your next commit, hooks will auto-compile and run.

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Configuration

Store defaults in .evnx.toml at the project root:

[defaults]
env_name = "production"        # which .env.<name> commands operate on
example  = ".env.template"     # the template path, if not .env.example

[scan]
severity            = "high"        # "high" | "medium" | "low"
exclude             = ["fixtures"]  # paths this project never scans
ignore_placeholders = true

# Your own secret formats, beyond the built-in ones. Repeat per rule.
[[scan.patterns]]
name  = "Acme API key"
regex = "ACME-[A-Z0-9]{32}"

[validate]
strict           = true
validate_formats = true
ignore           = ["boolean_trap"]

[sync]
naming_policy = "warn"         # "warn" | "error" | "ignore"

[diff]
ignore_keys = ["BUILD_ID"]

[backup]
keep = 3

[cloud]
vault = "my-app/production"    # written by `evnx cloud link`

# What each variable *is* — read by validate, scan and sync.
[vars]
PORT       = { format = "port", description = "HTTP listen port" }
STRIPE_KEY = { secret = true, environments = ["production"] }

A setting belongs here if it is true of the project and would otherwise be repeated on every invocation. It does not if it expresses what this invocation should do — which is why [scan] severity is configurable and --exit-zero is not.

Precedence is flag > config > default. Lists combine rather than replace, so --exclude dist scans with dist and the project's excludes. Settings that can weaken scanning are announced on every run. Unknown keys warn and never fail, so a file written for a later evnx keeps working on an earlier one.

Full reference: https://www.evnx.dev/guides/reference/configuration-file

⚠️ On v0.4.x and earlier this file did nothing. The loader existed and nothing called it, so a project with [validate] strict = true validated non-strictly and said nothing. Keys named in older copies of this README — env_file, auto_fix, exclude_patterns, [convert], [aliases] — were never read by anything and do not exist.

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Known Limitations

Array and multiline values — evnx follows the strict .env spec where values are simple strings. The following will not parse correctly:

# Not supported
CORS_ALLOWED=["https://example.com", "https://admin.example.com"]
CONFIG={"key": "value"}
DATABASE_HOSTS="""
host1.example.com
host2.example.com
"""

Use comma-separated strings and parse them in application code. A --lenient flag for extended syntax is under consideration — see open issues.

Multiple environments are supported as of v0.5.0. evnx scan reads every .env variant it walks past, and --env-name production resolves to .env.production across validate, scan, diff, sync, convert, backup and template.

⚠️ Before v0.5.0, evnx scan silently skipped .env.production, .env.local, .env.staging and every other dotted variant, and reported "no secrets detected" without opening them. If you relied on evnx scan as a gate on an earlier version, it never saw the file most likely to hold production credentials.

Windows — file permissions checking is limited (no Unix permission model). Terminal color support requires PowerShell or Windows Terminal on older systems.

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Development

git clone https://github.com/urwithajit9/evnx.git
cd evnx

cargo build                          # core features only
cargo build --all-features
cargo test
cargo clippy --all-features -- -D warnings
cargo fmt

Feature flags:

[features]
default = []
migrate = ["reqwest", "base64", "indicatif"]
backup  = ["aes-gcm", "argon2", "rand"]
full    = ["migrate", "backup"]

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Contributing

See CONTRIBUTING.md. Contributions are welcome in: additional format converters, secret pattern improvements, Windows enhancements, extended .env format support, and integration examples.

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License

MIT — see LICENSE.

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Credits

Built by Ajit Kumar.

Related projects: python-dotenv, dotenvy, direnv, git-secrets.

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