CORS Header Generator
Configure cross-origin resource sharing with the free CORS Header Generator. Set supported options for allowed origins, HTTP methods, request headers and other CORS settings to prepare response headers for your API or web application. Choose permissions appropriate for your use case and avoid allowing every origin unless it is genuinely required. Apply and test the generated headers on your server.
Use a specific origin instead of * when credentials are required.
What is CORS Header Generator?
Generate Cross-Origin Resource Sharing (CORS) headers with this free online CORS Header Generator. Configure supported options for allowed origins, HTTP methods, request headers and other cross-origin settings for APIs and web applications. Use the output as a starting point for server configuration. Allow only the origins and permissions your application requires, then test the headers with your actual frontend and API.
Why use this tool?
- Generate common web files and snippets from a few inputs.
- Avoid syntax mistakes in boilerplate.
- Get a starting point you can adapt to your project.
How to use CORS Header Generator
- Step 1. Fill in the options the tool asks for.
- Step 2. Review the generated output.
- Step 3. Copy it into your project and adjust it for your site.
Common use cases
Important notes
- Review generated output before using it in production.
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CORS Header Generator FAQ
What is CORS Header Generator?
Generate CORS response headers for web APIs and applications. Configure allowed origins, methods and headers for cross-origin requests.
Do I need an account to use CORS Header Generator?
No. You can use it without creating an account.