Env file diff checker
Compare .env.example and local env keys to find missing and extra entries.
Inputs stay in your browser. Ignores comments and blank lines and reports duplicate keys.
Compares keys only; values are not retained, shown, or downloaded.
How to use this tool
Compare .env.example and local env keys to find missing and extra entries.
Compare environment configuration keys for missing, extra, duplicate and invalid declarations.
💡 3 Quick Steps to Get Started
Paste reference and target configuration; remove actual values first if appropriate.
Compare keys: reference A= and B= against target A= reports missing B.
Download the key-only report and separately check values and deployment requirements.
When it helps
Compares keys only, not values, for pre-deploy checks.
How it works
Ignores comments and blank lines and reports duplicate keys.
Worked example
Example: check whether production misses API_URL or SECRET.
Limits and data handling
It does not validate values, runtime behavior, or whether a deployment will work.
No. The Env file diff checker runs in the browser. Do not paste production secrets or unredacted personal data.
Env file diff checker guide
Workflow and limits
Paste reference and target configuration; remove actual values first if appropriate.
Compare keys: reference A= and B= against target A= reports missing B.
Download the key-only report and separately check values and deployment requirements.
Parsing and reports use keys only. Configuration contents are not uploaded and values are omitted from reports; raw input remains in the open page textarea and memory.
Input is limited to 100000 characters. The tool does not validate values, connections, service readiness or every .env syntax, and cannot guarantee a successful deployment.
Feedback
How can we improve this tool?
Send a suggestion or bug report for this tool.
FAQ
What input does the Env file diff checker accept?
Paste two env texts containing KEY=value lines.
How does the Env file diff checker produce its result?
It ignores comments and blanks, compares keys only, and lists missing, extra, and duplicate entries.
What are the Env file diff checker limitations?
It does not validate values, runtime behavior, or whether a deployment will work.
Does the Env file diff checker upload data?
No. The Env file diff checker runs in the browser. Do not paste production secrets or unredacted personal data.
