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Validate .env files: format, duplicates, secret detection.
All validation happens in your browser. Your .env content is never uploaded.
Validate and analyze .env files. Detects common mistakes: invalid keys, missing quotes around values with spaces, duplicate keys, suspicious secrets that look like real credentials, and entries that don't use the KEY=VALUE format. Helps you find issues before they break your deploy.
The .env File Validator helps developers catch common configuration errors such as invalid keys, missing quotes, and duplicate entries before deployment. Operating entirely free with high rate limits, it quickly scans environment files to prevent runtime issues and accidental credential exposure.
Good to know: Projects requiring automated environment validation within a continuous integration pipeline or command-line interface may need a dedicated build plugin or script instead.
Quickly identify syntax errors, duplicate keys, and exposed secrets in your environment configuration files.
Open the .env File Validator tool
Navigate to the .env File Validator web tool to begin your configuration audit.
Paste your environment variables
Copy the contents of your .env file and paste them directly into the provided input area.
Run the validation analysis
Click the validate button to scan for invalid keys, missing quotes, and formatting issues.
Review the detected errors
Check the results for duplicate keys, suspicious secrets, or entries not using the KEY=VALUE format.
Fix and export your file
Correct the highlighted issues in your source file to ensure a successful and secure deployment.
Estimated time: PT1M
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