Environment Variable Formatter
Clean up and normalize a list of KEY=value environment variable definitions - handles whitespace, comments, quoting, and duplicates.
Paste your KEY=value lines below - this tool trims stray whitespace, flags duplicate keys, and normalizes quoting, without ever transmitting the values anywhere.
Everything you paste stays in your browser - nothing is sent to or stored on our servers.
For checking values specifically against a Docker Compose file's expectations (missing values, unresolved ${VAR} references), see the Docker Compose Environment Validator.
What Does This Tool Do?
It reformats a list of KEY=value lines (like the contents of a .env file) - trimming inconsistent whitespace around the =, normalizing quote usage, and flagging keys that are defined more than once.
Why Use This Tool?
.env files accumulate small inconsistencies over time (extra spaces, mixed quoting styles, a variable defined twice after a merge) that don't cause errors but make the file harder to read and maintain. This tool cleans that up in one pass.
How to Use It
- Paste your environment variable lines.
- Click Format.
- Review the cleaned-up output and any duplicate-key warnings, then copy it back into your .env file.
Important Notes
Everything you paste here stays in your browser - values are never sent to or stored on any server. Comments (lines starting with #) are preserved as-is.