.env File Parser

Parse and validate .env file contents. View key-value pairs in a table, detect common issues (spaces around =, unquoted values with special chars, duplicates), and convert to JSON.

.env File Contents

11 variables5 comments

Warnings (1)

Line 2 · APP_NAME: Value has spaces — consider quoting it

Parsed Variables

Show secrets

Key	Value	Type
APP_NAME	My Awesome App	string
APP_ENV	development	string
APP_PORT	3000	number
APP_DEBUG	true	boolean
DATABASE_URL	postgresql://user:password@localhost:5432/mydb	string
DATABASE_POOL_SIZE	10	number
OPENAI_API_KEY	••••••••	string
STRIPE_SECRET_KEY	••••••••	string
ENABLE_NEW_UI	false	boolean
MAX_UPLOAD_SIZE_MB	50	number
OPTIONAL_FEATURE	(empty)	empty

JSON Export

{
  "APP_NAME": "My Awesome App",
  "APP_ENV": "development",
  "APP_PORT": "3000",
  "APP_DEBUG": "true",
  "DATABASE_URL": "postgresql://user:password@localhost:5432/mydb",
  "DATABASE_POOL_SIZE": "10",
  "OPENAI_API_KEY": "sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "STRIPE_SECRET_KEY": "sk_test_xxxxxxxxxxxxxxxxxxxxxxxx",
  "ENABLE_NEW_UI": "false",
  "MAX_UPLOAD_SIZE_MB": "50",
  "OPTIONAL_FEATURE": ""
}

How to Use .env File Parser

1Paste your .env file content into the input area.
2View all key-value pairs in a structured table with type detection.
3See any warnings for common .env issues and export as JSON.

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Frequently Asked Questions

What is a .env file and how does it work?▾

.env files store environment variables as KEY=VALUE pairs, one per line. They are loaded into process.env at runtime by libraries like dotenv (Node.js), python-dotenv (Python), or godotenv (Go). Comments start with #. Lines without = are ignored or flagged as errors. .env files should NEVER be committed to version control — add them to .gitignore. Use .env.example with placeholder values for documentation. Common loaders: dotenv (npm), python-dotenv, spring-boot (Java), config (Ruby).

How are different value types handled in .env files?▾

Strings: KEY=value (unquoted) or KEY="value" (double-quoted) or KEY='value' (single-quoted). Quoted values can include spaces, special characters, and escaped characters. Multiline: KEY="line1\nline2" (escaped newline in double quotes). Numbers: stored as strings — your app must parse them. Booleans: typically "true"/"false" — parse in your app. Empty values: KEY= or KEY="" (empty string). Undefined: KEY (no = sign, treated as null or error by some loaders). Best practice: quote values that contain spaces, commas, or #.

What is the difference between .env, .env.local, .env.production?▾

Different frameworks use multiple .env files with a priority system. Next.js priority (highest → lowest): .env.$(NODE_ENV).local → .env.local → .env.$(NODE_ENV) → .env. "local" files are for machine-specific overrides and should be gitignored. ".env.production" is for production defaults (safe to commit, no secrets). ".env.development" is for dev defaults. Vite and Create React App use similar conventions. Use .env.example to document all required variables without real values.

How do I handle secrets in environment variables?▾

Never commit .env files with real secrets to git. Options: 1) Secret managers: AWS Secrets Manager, HashiCorp Vault, Azure Key Vault — fetch at runtime. 2) CI/CD secrets: GitHub Actions secrets, GitLab CI variables — injected during deployment. 3) Platform env vars: Heroku config vars, Vercel environment variables, Railway secrets. 4) Dotenv vault: encrypt .env and commit .env.vault. Rotate secrets immediately if accidentally committed. Use "git secrets" or GitHub secret scanning to prevent accidental leaks.

What are common .env file mistakes?▾

Spaces around = : KEY = value is invalid in some loaders (should be KEY=value). Unquoted values with spaces: KEY=hello world (only "hello" is the value in some parsers). Missing quotes on values with # : KEY=abc#def — "#def" may be treated as a comment. Unicode/emoji: requires proper encoding, may need quotes. Trailing whitespace: KEY=value — space may be included in value. Duplicate keys: last value wins in most implementations but is confusing. Missing newline at EOF: some tools require a trailing newline.

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