#232 · Backend Framework Tools Developer Tool

Express Inspector

Inspect Express source for security gaps, middleware ordering problems, async error handling risks, REST inconsistencies, and blocking operations.

Developer Input

Express static audit

Paste Express application, route, middleware, or package source

const express = require("express");
const cors = require("cors");
const app = express();

app.use(cors());
app.get("/users", async (req, res) => {
  const users = await db.query("SELECT * FROM users");
  res.json(users);
});
app.use(express.json());
app.listen(process.env.PORT || 3000);

Inspection Profile

Environment

env

Check security Check middleware order Check async handlers Auto-run while typing

Your code is processed locally in your browser and is not uploaded by this tool.

How to use this developer tool

Paste one or more Express files.
Select a full, security, performance, API, or error-handling profile.
Enter the target environment.
Run the inspection and review each rule ID, severity, file, line, and suggested remediation.

What this developer tool does

The inspector applies static rules for common Express security, ordering, error propagation, REST design, and performance issues.

Source normalization → rule matching → line mapping → severity scoring → remediation report

This is not a penetration test and does not verify runtime behavior, dependency vulnerabilities, network configuration, or database permissions.

Example

If cors() is unrestricted in a production profile, the report marks it as a high-severity CORS finding and recommends restricting allowed origins.

Tips for better output

Include the main app file and all router modules.
Provide package.json for version context.
Use a production environment profile for deployment checks.
Treat inferred findings as review prompts, not confirmed runtime defects.

FAQ

Is this a security scanner?

It is a static rule-based inspector, not a penetration tester or runtime security scanner.

Does it detect async errors?

It flags common async handlers that appear to lack try/catch, next(error), or a wrapper.

Can it inspect middleware order?

Yes. It checks common parser, route, 404, and error-handler ordering patterns.

Does it replace ESLint?

No. It complements linting with framework-specific static checks.

Is runtime behavior tested?

No. The code is never executed.

Related developer tools

Node Checker Node Generator Node Formatter Node Converter

Express inspection categories

Security	Helmet, CORS, rate limits, secrets, request limits
Errors	Async forwarding and error middleware shape
Middleware	Registration order and duplicates
Performance	Blocking calls and oversized bodies

Browse more developer tools

Calldeveloper category hub

Browse Backend Framework Tools