.env Viewer & Validator
Parse a .env file, mask secret values by default, and flag duplicate or malformed keys, entirely in your browser.
How to Validate a .env File for Free
1. Paste the contents of your .env file into the box on the left.
2. Every KEY=value pair is parsed instantly, with values masked by default.
3. Click the eye icon next to any value to reveal it temporarily.
4. Duplicate keys and malformed key names are flagged above the table.
Your Secrets Never Leave This Tab
Your .env content, including any secrets it contains, is parsed entirely in your browser and is never uploaded, logged, or sent to a server — safe to paste real production values.