Paste your environment variable lines
Copy the KEY=value lines from your .env file, your host's dashboard, or an AI-generated config — one variable per line.
CURSOR / GITHUB COPILOT / REPLIT / LOVABLE COMPARISONS
Env Guard
Paste the environment variable lines you're about to ship (from .env, your host's dashboard, or an AI-generated config) and Env Guard flags hardcoded-looking secrets, dev/debug flags left on, and common required variables that are missing — with a transparent risk score, not a black box.
- Updates live — no submit button
- Rules-based pattern matching, not AI-generated text
- All input stays in your browser — nothing is uploaded
One KEY=value pair per line. Results update automatically as you edit.
Risk score 0
Flagged lines
Commonly required, not found
How it works
Rules-based patterns flag risky lines
Env Guard checks each line against secret-like key names, hardcoded-looking values, known dev/debug flag patterns, and a list of commonly required variables, without sending anything anywhere.
Review the risk score and flagged lines
Each flag shows severity and the specific reason it was raised, so you can fix real issues instead of guessing at a black-box score.
Continue learning: AI coding tool limitations compared · Which AI coding tool is best for MVP development?
Frequently asked questions
Does this tool see my actual secrets?
No — everything runs in your browser. Nothing you paste is sent to a server, logged, or stored. Still, avoid pasting real production secrets into any tool; use redacted or placeholder values where possible.
How is the risk score calculated?
Each flagged line adds points based on severity (high, medium, low) and each missing commonly-required variable adds a small amount, capped at 100. It is simple, transparent weighted arithmetic — not a machine-learned or hidden score.
What counts as a "hardcoded-looking secret"?
A line whose key name suggests a secret (token, password, api key, etc.) with a non-placeholder value that is long or matches a known key-format prefix (like sk_live_ or AKIA). It is a heuristic, not certainty — always verify manually.
Will this catch every misconfiguration?
No. It is a fast first pass using common patterns, not an exhaustive security audit. Treat a clean scan as one signal, not a guarantee, and always review environment configuration manually before a production deploy.
Why do the "missing required variables" matter?
AI-generated apps and quick deploys often skip variables like NODE_ENV, DATABASE_URL, or ALLOWED_ORIGINS until something breaks in production. Flagging common ones up front catches a class of "works locally, breaks live" bugs early.
Can I use this before every deploy?
Yes — paste your current environment configuration each time you change it. It is instant and free, so it fits naturally into a pre-deploy checklist alongside your existing review process.
How We Compare
| Feature | MVPHub | Cursor | GitHub Copilot |
|---|---|---|---|
| Flags hardcoded-looking secrets by pattern | Included | Limited | Not included |
| Flags dev/debug flags left on | Included | Not included | Not included |
| Transparent, itemized risk score | Included | Not included | Not included |
| Instant and free, no setup | Included | Not included | Not included |
| Scans your live deployed environment automatically | Not included | Not included | Not included |
Cursor and GitHub Copilot can flag obvious issues in code you are actively editing, but neither runs a dedicated pass over your environment configuration for secrets and dev flags. Env Guard is a focused, transparent second check you run before deploying.
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