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Frequently Asked Questions
▸ Env File Editor FAQ
What is a .env file?
A .env (dotenv) file stores environment variables as KEY=VALUE pairs. It keeps configuration like API keys, database URLs, and feature flags separate from source code. Frameworks like Node.js (dotenv), Python (python-dotenv), and Ruby load these files automatically.
Is this .env editor free?
Yes, completely free with no limits. Unlike cloud-based secret managers that require accounts and charge monthly fees, this tool runs entirely in your browser with no signup and no data transmission.
Is it safe to paste secrets here?
Yes. This editor runs 100% client-side in your browser. No data is sent to any server. Your API keys, database passwords, and tokens never leave your device. Verify in your network tab — zero outbound requests.
What formats can I import and export?
Import: .env files, JSON objects, and YAML. Export: .env format, JSON, YAML, and .env.example (keys only, no values). Convert between formats instantly.
Can I compare two .env files?
Yes. The Compare tab shows keys that are missing, added, or changed between two .env files. Useful for comparing development vs production configs or debugging missing variables.
Does it detect duplicate keys?
Yes. Duplicate keys are highlighted in red with a count in the stats. In .env files, the last value wins, which can cause hard-to-debug issues.
Can I mask secret values?
Yes. Toggle the Mask button to hide all values with dots. Safe for screen sharing or screenshots without exposing API keys.
Can I generate a .env.example?
Yes. Export as .env.example to create a template with all keys but empty values and comments — the standard way to document required environment variables in a repo.
Free Online .env File Editor & Validator
This free tool lets you create, edit, validate, and compare .env (dotenv) environment files directly in your browser. Whether you need to check for duplicate keys, convert between .env and JSON/YAML, or compare development and production configs, this editor handles it with zero setup and complete privacy.
Edit Environment Variables Safely
Your .env files contain sensitive credentials — API keys, database passwords, secret tokens. Unlike cloud-based editors that transmit your data to servers, this tool runs 100% client-side. Your secrets never leave your browser. No accounts, no server uploads, no data logging.
Validate & Clean Up .env Files
Instantly detect duplicate keys, empty values, syntax errors, and formatting issues. Sort keys alphabetically, trim whitespace from values, and remove duplicates with one click. The stats dashboard shows a live count of variables, comments, duplicates, and empty values.
Convert Between .env, JSON & YAML
Import JSON objects or YAML configs and convert them to .env format. Export your .env as JSON (for programmatic use), YAML (for Docker Compose or Kubernetes), or .env.example (for repository documentation). One-click conversion between all formats.
Compare Environment Configurations
Paste two .env files side by side to see which keys are missing, added, or have different values. Essential for comparing .env.development vs .env.production, or verifying that all required variables exist in deployed environments.