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Web Server Config

Lint nginx configs and build CORS response headers.

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Linting nginx and building CORS headers

Reverse proxy configs gate TLS, routing, and browser security headers. nginx lint catches unclosed blocks and invalid directives before reload fails production traffic. CORS header builders translate allowed origins and methods into response headers API gateways expect.

CORS is not authentication. Overly permissive Access-Control-Allow-Origin values expose cookies and tokens to malicious sites when combined with credentialed requests. Prefer explicit origin lists over wildcard when credentials are enabled.

nginx reload validates syntax but not upstream reachability. Pair lint with staging curl checks against preflight OPTIONS requests your SPA issues during login.

Lint configs locally when they reference internal upstream hostnames or mTLS certificate paths. Keeping snippets in the browser avoids uploading full nginx.conf to public lint pastebins.

Reference Guide

DevOps tool - all processing runs locally in your browser. No data is sent to a server.

Operation: nginx-test

Paste input, click Run, and copy the result. For two-input tools, fill both fields before running.

Example Input

server {
  listen 80;
  location / { return 200 'ok'; }
}

A sample loads automatically when you open this tool. Use Load Sample to reset it.

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