Parse both environments
Each pasted block is read as KEY=value lines into two independent sets, so the tool can tell which keys exist in one environment, both, or neither.
ENVIRONMENT DIFF SCAN
Environment Mismatch Detector
Paste key-value settings from a working environment and a failing one to surface the configuration differences most likely to explain the failure.
- Uses your inputs in a transparent calculation
- Instant result with practical next steps
- No signup required
Planning guidance only. Validate important decisions with customer evidence and your delivery team.
YOUR INPUTS
Build your result
Complete every field. The result updates only when you choose Calculate.
How it works
Classify every difference
Changed and missing keys are classified by name — host, version, mode, timeout, and protocol-shaped keys are flagged as high-signal, while secrets and IDs that legitimately differ per environment are weighted down.
Rank suspects by likely relevance
The mismatch score and the ranked suspect list prioritise the differences most likely to explain an environment-specific failure, instead of dumping every changed line with equal weight.
Continue learning: How AI coding tools invent fake packages · How to evaluate AI coding tools for your team
Frequently asked questions
What format should I paste my environment values in?
One KEY=value per line, the same shape as a .env file. You can copy straight from your .env, a deploy dashboard's environment variables screen, or a config file after reformatting to KEY=value.
Why are some differences weighted higher than others?
Keys with names like VERSION, HOST, MODE, TIMEOUT, or PROTOCOL are far more likely to explain a working-vs-failing gap than keys like SECRET or CLIENT_ID, which routinely and safely differ per environment. The scan weights accordingly rather than treating every line the same.
Is it safe to paste real secrets into this?
Nothing you paste is sent anywhere — the comparison runs entirely in your browser. That said, treat any tool as a precaution: paste placeholder values for secrets if you're not certain, since only the key names and whether values match actually matter for the diff.
What if a key only appears in one environment?
It's listed separately from changed values, since a missing key can mean a different failure mode (an unset variable) than a changed one (a wrong value). Both are scored, with host/version-shaped missing keys weighted like their changed-value counterparts.
Does a high mismatch score mean that's definitely the bug?
No — it means those differences are the most plausible starting point. Confirm by aligning the top-ranked suspect first and re-testing, rather than changing everything flagged at once.
How We Compare
| Feature | MVPHub | GitHub Copilot | Cursor |
|---|---|---|---|
| Focused input-based assessment | Included | Limited | Limited |
| Transparent calculation | Included | Limited | Limited |
| No repository or server access required | Included | Limited | Limited |
| Workflow-specific next steps | Included | Limited | Limited |
GitHub Copilot and Cursor can inspect a connected workspace's configuration files directly. MVPHub instead diffs two pasted environment snapshots with a transparent, ranked scoring formula, without needing access to either environment.
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