.env File Validator
Validate .env files: syntax, duplicate keys, unquoted spaces, unclosed quotes and real-looking secrets. Free and private: runs in your browser.
Paste a .env file to catch problems that make Docker, dotenv or your shell read the wrong value.
Runs entirely in your browser. Code, keys and tokens are never uploaded, logged or stored.
Use cases
- Spot-check a snippet during code review.
- Teach a team what the risky pattern looks like.
- Double-check a fix before you push it.
Frequently asked questions
Should .env be committed?
No. Add .env to .gitignore and commit a .env.example with the keys and placeholder values.
Is the .env File Validator free?
Yes. It is free with no sign-up, and it runs entirely in your browser, so your input is never uploaded or stored.
Does a clean result mean my code is secure?
No. It means none of the common patterns this tool looks for were found in the snippet. Combine it with code review, dependency scanning and a full repository scan.
Related tools
Catch secrets, injection and unsafe code in every pull request with CodeInspector.