Cors Headers Generator

Generate secure CORS headers for your HTTP responses and enable cross-origin resource sharing correctly

CORS Configuration Details

Detail Level

Format

Try:

Preview

Your generated content will appear here

How to Get Started

Simple steps to create amazing results

Select Your CORS Configuration

Choose the origin domains you want to allow, or select wildcard (*) for unrestricted access. Pick from common presets or customize your own settings.

Customize HTTP Methods & Headers

Select which HTTP methods (GET, POST, PUT, DELETE, etc.) and headers your API should accept. Configure credentials and caching options as needed.

Copy & Implement Headers

Generate your CORS headers instantly and copy them to your clipboard. Paste them into your server configuration or application code and you're done!

Main Features

Powerful capabilities at your fingertips

Smart Configuration Wizard

Interactive wizard guides you through CORS setup with intelligent suggestions based on your use case and security requirements.

Multiple Output Formats

Generate headers for various server platforms including Node.js, Apache, Nginx, PHP, and more. Get ready-to-use code snippets for instant implementation.

Real-Time Validation

Instantly validate your CORS configuration with built-in security checks and best practice recommendations to avoid common mistakes.

Export & Save Configurations

Download your CORS headers as configuration files or save preset configurations for different environments (development, staging, production).

Security-First Approach

Built-in warnings for overly permissive settings and recommendations for tightening security while maintaining functionality.

Custom Header Builder

Advanced mode for creating custom CORS policies with granular control over every header parameter and directive.

Frequently Asked Questions

Everything you need to know

What is CORS?

CORS (Cross-Origin Resource Sharing) is a security feature implemented in web browsers to allow or restrict resources requested from another domain.

How do I enable CORS?

You can enable CORS by setting the appropriate HTTP headers in your server response. Use our CORS Headers Generator to simplify this process.

What are the common CORS headers?

Common CORS headers include Access-Control-Allow-Origin, Access-Control-Allow-Methods, and Access-Control-Allow-Headers.

Is it safe to use Access-Control-Allow-Origin: *?

Using the wildcard (*) allows any domain to access your resources, which can be a security risk. It's recommended for public APIs only. For sensitive data, specify exact domains that should have access.

What's the difference between simple and preflight requests?

Simple requests are sent directly, while preflight requests send an OPTIONS request first to check if the actual request is safe to send. Preflight occurs when using custom headers or methods like PUT/DELETE.

How do I allow credentials with CORS?

Set Access-Control-Allow-Credentials to true and specify exact origins (you cannot use wildcard *). This allows cookies and authentication headers to be sent with cross-origin requests.

Ready to Configure CORS Headers?

Generate secure, compliant CORS headers in seconds and eliminate cross-origin errors from your web applications.