.env Secret Safety Linter
Check dotenv syntax, duplicates, placeholders, and secret-looking values without exposing them.
Processing stays in your browser. This is a heuristic scanner. It can miss secrets and flag harmless values. Output redacts values; do not treat a clean report as proof that a file is safe to publish.
How to use the .env secret safety linter
Check dotenv syntax, duplicates, placeholders, and secret-looking values without exposing them. Complete the dotenv content fields above, or upload a UTF-8 text file for the first field. Choose Run tool, review the output, then copy or download the result.
Example
Two PORT assignments produce a duplicate-key warning.
Good to know
This is a heuristic scanner. It can miss secrets and flag harmless values. Output redacts values; do not treat a clean report as proof that a file is safe to publish.