Audit essential security headers

Developers and administrators can use this before a release or during an audit to identify missing browser protections at a glance.

Review the HTTP protections returned by a site and see which essential security headers are missing or need a stricter configuration.

How to use

Enter the address of the site you want to test.
Launch the test to request an HTTP header analysis.
Wait while the tool's server queries the target and returns the response.
Review the list of protections that are present or missing.
Note the headers to strengthen before your production release.

Example

An administrator is preparing to launch a small business site. They run the audit on the staging address, then compare the headers flagged as missing with their configuration. They use that list to plan fixes before the public launch.

Limits and formats

The result depends on the target site's response at the time of the test; a configuration change can alter the audit.
The tool does not fix headers: it provides a list of points to check and configure yourself.
Some headers may be added by a CDN, proxy or application server, not only by the application.
A missing header is not always an exploitable flaw, but it reduces a defensive protection.

Where processing happens

This network tool sends the domain, IP address or URL you enter to the tool's server. That server then queries public DNS or the target site and returns the result. No file is sent.

Frequently asked questions

Why are some headers missing?

They may be absent because the server, CDN or application does not add them. A partial configuration or an older deployment template often explains the gap. The audit helps you spot these omissions before correcting the delivery chain.

Can I test a site that is not mine?

Technically, the tool queries an address you enter. For a site you do not manage, keep it to a public check and respect the terms of use. Do not use the result to claim a fix you cannot apply.

How often should I run the audit?

Run it again after a change of server, CDN, framework or security configuration. A check before each major release is useful. In between, regular monitoring helps detect a regression or a header removed by mistake.