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.env.example Diff Checker

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Compare a .env file against its .env.example template to flag keys missing from either side

Paste your .env file and its .env.example template side by side and it flags exactly where they've drifted apart: keys a teammate added locally but never documented in the template, keys the template still lists that nobody's .env actually needs anymore, and keys present in both but left blank in the example, which usually means someone forgot to note what the variable is for. This is the check that catches the classic onboarding failure mode where a new teammate copies .env.example, runs the app, and hits a confusing runtime error because a required key silently isn't there. It only compares key names and flags empty example values, so it won't tell you whether a value is actually correct, just whether the two files agree on which keys should exist.

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How to use .env.example Diff Checker

  • 1.Paste your working .env file into the first box and your .env.example template into the second.
  • 2.Review the missing-in-example list before committing, so a key you added locally doesn't stay undocumented for the next teammate.
  • 3.Check the empty-value-in-example list to catch template entries that were never given a placeholder or comment explaining what they're for.

Frequently asked questions

Does it check that values are correct, like a well-formed URL?
No, it only compares which keys exist in each file and whether the example's value is empty. It doesn't validate the semantic content of any value.
What counts as an empty value in the example?
A key like FOO= with nothing after the equals sign, while the same key has a real value in your .env. It's a common sign the template was never filled in with a placeholder.
Does it send my .env file anywhere?
No, parsing and diffing run entirely in your browser when used from the site; secrets in your .env never leave your machine.
What if a key appears twice in one of the files?
Duplicate keys aren't specifically flagged here, use the .env Parser tool first if you need duplicate detection within a single file.

Use via API, SDK, or MCP

cURLcurl "https://api.utilix.tech/v1/tools/env-diff-checker" \
  -H "Authorization: Bearer utx_live_..."
# Free: 1,000 req/day · Pro: 10,000 req/day

Get an API key from your dashboard · Full API docs →

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