.env File Toolkit

Parse, validate, diff, convert, and sanitize .env files. Compare local vs production, export to Docker/K8s, generate .env.example. Runs entirely in your browser.

.env Input
Parsed
Paste a .env file to see it parsed and validated
.env File Reference

Syntax Rules

  • KEY=value -- basic assignment
  • KEY="value with spaces" -- quoted values
  • KEY='literal $value' -- single-quoted (no expansion)
  • # comment -- full-line comment
  • KEY=value # inline -- inline comment (some parsers)
  • EMPTY= -- empty value (valid but flagged)

Best Practices

  • Use UPPER_SNAKE_CASE for key names
  • Quote values containing spaces, #, or special chars
  • Never commit real .env files to git
  • Keep a .env.example in your repo
  • Group related vars with comments
  • Add .env to .gitignore
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How to Parse, Diff, and Convert .env Files

Every modern application uses .env files for configuration, but there's no standard tool for working with them. This .env toolkit parses, validates, diffs, and converts environment files — all in your browser, so your secrets never leave your machine.

The diff tool is particularly useful for debugging "works on my machine" problems. Paste your local .env and your production .env side by side to instantly see which variables are missing, which have different values, and which match. Color-coded results make mismatches obvious at a glance.

Need to convert your .env into a different format? Export to JSON, YAML, Docker Compose environment: blocks, or Kubernetes ConfigMap YAML with one click. The .env.example generator automatically redacts secret values while preserving structure and comments — perfect for committing to version control.

Tips

  • Always quote values that contain spaces, equals signs, or special characters in .env files: MY_VAR="value with spaces".
  • Use the validator to catch duplicate keys — the last value wins in most parsers, which can cause subtle bugs.
  • The .env.example generator detects common secret patterns (API keys, database URLs, tokens) and replaces them with descriptive placeholders automatically.
  • When converting to Kubernetes ConfigMap, remember that secrets should use K8s Secrets instead — ConfigMaps are not encrypted at rest.