Format, sort, and validate dotenv configuration files without uploading environment variables or secrets. Detect malformed assignments and duplicate keys before deployment.
Secrets remain in your browser, but avoid sharing the formatted output publicly.
Formatted .env content will appear here.
How to use the .env File Formatter & Validator
Paste the file, select the normalization options, and review every warning. Copy the result only after confirming that comments remain meaningful and that duplicate keys were resolved intentionally.
Frequently Asked Questions
What is a .env file?
A .env file stores environment-variable assignments commonly loaded by applications and development tools.
Does this tool reveal or upload secrets?
No. Processing runs locally, but you should still avoid pasting secrets into untrusted devices or sharing the output.
What syntax does it validate?
It checks common KEY=value dotenv assignments and flags malformed or duplicate keys.
Will comments be preserved?
Yes. Comments and blank lines are retained unless sorting changes their relative position.
Should I commit a .env file to Git?
Usually not when it contains secrets. Commit a sanitized .env.example file instead.