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 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 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 .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"
Why Choose Our Client-Side CORS Headers Generator?
Process operations securely, quickly, and directly in your browser with 100% local client-side memory execution.
100% Secure & Local
Your data never leaves your device. All calculations, hashing and formatting are performed locally in sandboxed client memory.
High-Fidelity Code Formats
Preserves syntax, formatting blocks, text borders and configurations precisely during CORS Headers Generator.
Blazing Fast Speeds
Powered by client-side browser workers, updates happen instantly without upload delays or network queue times.
Process in Three Simple Steps
Input Code
Paste, type, or drag & drop your raw code or inputs directly into the editor interface above.
Configure & Apply
Choose your conversion settings, custom formats, or keys and review the real-time preview results.
Save Output
Instantly copy the finalized code output to your clipboard or download it as a local file.
code_output
Ready for use
Frequently Asked Questions about CORS Headers Generator
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.
CORS Headers Generator runs entirely in your browser — nothing is ever sent to our servers. Your data stays on your device at all times.
Once the page has loaded, CORS Headers Generator works fully in your browser without an internet connection.
Yes, all cryptographic operations run in your browser using the Web Crypto API. Your secrets and keys never leave your device.
Yes, CORS Headers Generator is fully responsive and works on smartphones and tablets with any modern browser.