CORS Headers Generator — Cross-Origin Policy Builder
Generate CORS headers configuration for your API or web server. Configure allowed origins, methods, headers, and credentials.
Nginx
# Nginx CORS headers add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization'; add_header 'Access-Control-Max-Age' 86400;
Express.js
// Express.js middleware
app.use((req, res, next) => {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization');
res.header('Access-Control-Max-Age', '86400');
if (req.method === 'OPTIONS') return res.sendStatus(204);
next();
});Apache
# Apache .htaccess CORS headers Header set Access-Control-Allow-Origin "*" Header set Access-Control-Allow-Methods "GET, POST, OPTIONS" Header set Access-Control-Allow-Headers "Content-Type, Authorization" Header set Access-Control-Max-Age "86400"
Frequently Asked Questions about CORS Headers Generator
- Is CORS Headers Generator completely free?
- Yes, CORS Headers Generator is 100% free with no registration, no usage limits, and no hidden costs. Use it as many times as you need.
- Is my data private?
- CORS Headers Generator runs entirely in your browser — nothing is ever sent to our servers. Your data stays on your device at all times.
- Does it work offline?
- Once the page has loaded, CORS Headers Generator works fully in your browser without an internet connection.
- Is my sensitive data processed locally?
- Yes, all cryptographic operations run in your browser using the Web Crypto API. Your secrets and keys never leave your device.
- Can I use it on my phone or tablet?
- Yes, CORS Headers Generator is fully responsive and works on smartphones and tablets with any modern browser.
This tool runs entirely in your browser. No data is ever sent to our servers.