varlock
Magic .env files built for sharing:
Human-first, AI-friendly
Human-first, AI-friendly
# Add declarative schema info to your env vars using @decorator comments# @sensitive @required @type=string(startsWith=sk-)OPENAI_API_KEY=
# @type=enum(development, preview, production, test)APP_ENV=development # set non-sensitive default values directly
# use function calls to securely fetch data from external sourcesXYZ_TOKEN=exec('op read "op://api-prod/xyz/auth-token"')Unlike .env.example, your .env.schema is a single source of truth, built for collaboration, that will never be out of sync.
Plugins
Integrations
Languages
Validation
Powerful validation capabilities, without custom logic. Misconfiguration errors are surfaced much earlier in your development cycle, with clear error messages.
Type-safety
Automatically generate types according to your schema - the single source of truth - instead of writing them by hand.
Security
Redact sensitive info from stdout and global console methods. Detect leaks in bundled client code and outgoing server responses.
Environments
Combine defaults, environment-specific .env files, local git-ignored overrides, and process env vars. Compose values together using functions.
Secure secrets
Read from any external providers via plugins or CLI commands.
Installation
# Install as a dependency in a js projectnpx varlock init
# OR install as standalone binary via homebrewbrew install dmno-dev/tap/varlock# OR via cURLcurl -sSfL https://varlock.dev/install.sh | sh -s
Drop-in replacement for dotenv
import 'dotenv/config'; import 'varlock/auto-load';
// *optional* type-safe env access import { ENV } from 'varlock/env'; const client = new AbcApi(process.env.ABC_API_KEY); const client = new AbcApi(ENV.ABC_API_KEY); varlock can be used as a direct replacement for dotenv in most projects. Just swap your import and get validation, security, and
more. No other code changes required!
Run anywhere - with any language
varlock run -- python my_script.py
Use varlock run to inject resolved, validated env vars into
another process.
