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About .env Validator
The Dotenv (`.env`) File Linter & Security Auditor checks environment variable files for syntax breaks, unquoted values containing spaces, duplicate variable definitions, leading/trailing whitespace, and accidentally committed production API secrets.
How to Use .env Validator
Step 1
Paste your `.env` content into the validator.
Step 2
Review the live health score and diagnostic findings.
Step 3
Inspect highlighted warnings and recommendations.
Step 4
Click "Copy Report".
Practical Use Cases for .env Validator
Pre-Commit `.env` Syntax & Secret Auditing
Audit `.env` files for syntax errors and prevent committing live AWS, Stripe, or OpenAI production secrets to Git.
Debugging Shell Variable Expansion Issues
Identify unquoted special characters (`#`, `$`, quotes) that break Docker, Bash, and Node.js dotenv loaders.
Input & Output Examples
Detecting Unquoted Value with Spaces
`APP_TITLE=My Great Application`
Status: ⚠️ Warning at Line 1 | Message: `Value contains spaces without quotes; wrap in double quotes: APP_TITLE="My Great Application"`
Key Features & Performance
- ✓Detects: Unquoted spaces, duplicate keys, missing equals signs, unclosed quotes, and invalid variable names.
- ✓Security scanner: flags potential live secrets (JWT tokens, private keys, AWS access keys).
- ✓Displays exact line numbers with contextual fixes.
- ✓100% Client-Side memory execution.
- ✓1-Click Copy validation report.
Key Terminology & Definitions
POSIX Variable Name Rules
Environment variable names should consist exclusively of uppercase alphanumeric characters and underscores, without beginning with a number.
Secret Spillage
The accidental inclusion of sensitive credentials (API keys, private certificates) in public or shared files.