Dotenv Validator
Validate, format, and compact .env configuration text in your browser.
Paste .env content to validate common key/value syntax, normalize spacing, or create a compact copy for a deployment note or secret store import. Processing stays local to your browser.
How it works
Use this tool to check .env-style lines before sharing a sample file, copying values into a deployment system, or cleaning up local configuration notes. Each non-comment line must contain a variable name, an equals sign, and a value. Empty values are allowed when they are intentional.
The validator covers the common dotenv conventions used by many tools: blank lines, whole-line comments, inline comments that start after whitespace, quoted values, unquoted values, optional export prefixes, and portable variable names such as APP_ENV or DATABASE_URL.
Dotenv files are a convention rather than one universal standard. This tool checks common syntax and repeated names, but it does not know which variables your application requires or whether a value is safe for production.
Input and output stay in your browser. Treat .env files as sensitive because they often contain tokens, passwords, and private endpoints. Do not paste secrets unless you trust the device and page context you are using.
