Generate defensive HTTP headers

For developers starting a site or reviewing server configuration before a launch, audit or infrastructure change.

Harden a web response with a baseline of defensive HTTP headers and receive a clear configuration to adapt before deployment.

How to use

Enter the address of the site you are preparing a configuration for.
Run the generation to get a baseline of defensive headers.
Read the output and identify the directives to adapt to your server.
Copy the useful lines into your configuration file.
Test the configuration in a staging environment.

Example

A developer is starting a new site and wants to avoid forgetting basic protections. They enter the domain address, generate a header baseline, then adapt each directive to their hosting and needs. They check the real response before launch.

Input

https://example.com

Limits and formats

The generated baseline is a starting point: some directives can break features if applied without adaptation.
Needs vary with the resources, scripts, iframes and fonts used by the site.
The tool does not deploy anything or test the final response; you must configure your server or CDN.
After a change, check the site in a browser to detect possible blocking.

Where processing happens

The generation runs entirely in your browser. The address and choices you use stay on your device and are not sent to any external service. You can prepare several configurations without an account or storage.

Frequently asked questions

Can I copy the headers as they are?

They are a starting baseline, not a universal configuration. Adapt the rules linked to scripts, images, frames and allowed domains. Then test in staging to make sure the site still works correctly before you deploy to production.

Where should I place these headers?

They can be added by the web server, proxy or CDN that serves the site. Choose the location that matches your infrastructure and avoid contradictory duplicates. After deployment, check the real HTTP response.

Are these headers enough to secure a site?

No. They complement other measures such as input validation, session management and dependency updates. They reduce certain browser-side risks, but they do not fix an application flaw. Use them as part of a broader approach.