.env File Validator

Check .env syntax, duplicate keys, and common mistakes — in your browser.

Paste a .env file to check syntax, duplicate keys, and common mistakes. Stays in your browser.

FAQ

Is my .env uploaded?

No. Validation runs entirely in your browser. Never paste production secrets in shared screens.

About .env File Validator

Free .env file validator online. Check environment variable syntax, duplicate keys, and quoting issues before deploy.