Inspect environment configuration syntax and compare variable names between .env and .env.example. Avoid pasting real production secrets; all checks run locally in your browser.
Check .env files and environment variable names
Environment files store application configuration such as database connection settings, API endpoints and feature flags. A malformed variable or missing key can cause an application to fail during startup. This .env checker scans assignment syntax, detects duplicate keys and compares variable names between an .env file and its example template.
How to check an environment file
- Paste the contents of your sample .env file.
- Run the syntax check to identify malformed lines and duplicate keys.
- Optionally paste an .env.example file to compare variable names.
- Review missing keys and correct the source file locally.
Protect environment secrets
Do not paste production passwords, API tokens, private keys or database credentials into a public computer. This tool processes text locally and does not upload it, but browser extensions, shared devices and clipboard history can still expose sensitive values. Keep real .env files out of source control and use secret management for production deployments.
Frequently asked questions
Does this tool connect to my server?
No. It only checks the text you paste into the browser.
Does it validate framework-specific variable names?
It checks common dotenv assignment syntax and key consistency. Framework-specific requirements should also be checked against the framework documentation.
Related developer tools on SkillHost
Use these connected utilities as part of the same development workflow: analyze application logs, test patterns used in configuration parsing, format and review database queries. You can also browse all developer tools or explore practical developer projects and source-code examples on SkillHost.
Official documentation and further reading
For deeper implementation details, refer to the dotenv documentation and configuration guidance. Use the official specification or documentation to confirm runtime-specific behavior before deploying changes.
Privacy and browser processing
Core processing runs locally in your browser. SkillHost does not receive the text, code, tokens or data entered into this tool. Anonymous page-open and successful-use events may be recorded by SkillHost Tool Analytics; analytics events do not contain the submitted content.