Runs fully in your browser. Inputs stay on your device. See recent fixes on changelog.
CORS Headers Generator
Generate Cross-Origin Resource Sharing headers.
FreeRuns in browsercors generatorcors headers
Cmd/Ctrl+Enter Primary actionCmd/Ctrl+Shift+L Load sampleCmd/Ctrl+Shift+X Clear/resetCmd/Ctrl+Shift+C Copy result
About CORS Headers Generator
Generate Cross-Origin Resource Sharing headers. Generate CORS headers for cross-origin API access control online for free. Configure allowed origins, methods, credentials, and max-age for proper CORS setup. Produces high-quality output using configurable parameters and the browser's native random number APIs. Includes options for customizing format, length, and character sets. Everything runs client-side in your browser for maximum speed and privacy — no data is sent to any server, and no signup is required.
Related tools: Content Security Policy Generator, Meta Tag Generator, .htaccess Generator
How to Use CORS Headers Generator
- Configure the options and parameters as needed.
- Click Generate to produce the output.
- Copy or download the generated result.
Frequently Asked Questions
What is CORS Headers Generator?
Generate CORS headers for cross-origin API access control online for free. Configure allowed origins, methods, credentials, and max-age for proper CORS setup.
Are generated values truly random?
The tool uses the browser's built-in cryptographic random number generator (crypto.getRandomValues) when security matters, and high-quality pseudo-random algorithms for general-purpose generation. This ensures unpredictable, non-repeating output.
Can I customize the output?
Yes, the generator provides controls such as sliders, toggles, and selection menus to fine-tune the output to your exact requirements. Adjust length, character sets, formats, and other parameters before generating.
How are random values generated?
Values are generated entirely in your browser using JavaScript's native APIs. No external service or server call is involved, which means generation is instant and your output is never transmitted anywhere.
Is CORS Headers Generator free to use?
Yes, this generator is free to use with no limits on how many values you can create. No signup or account is needed.
Is my data safe when using CORS Headers Generator?
Yes, all generation happens in your browser. Nothing is sent to a server, and no generated values are stored or tracked.