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Security headers checkTest any website's security headers.
See which browser protections a website's homepage sends and which are missing, in a few seconds.
Run a full check: low-risk findings free with an account
Your account's first check covers security headers, plus 10 other areas of your website, with plain-English fixes.
Reading the result
Four verdicts.One line each.
- StrongThe main browser protections are in place.
- Some protections missingA few of the main protections are not sent.
- WeakMost of the main protections are not sent.
- Couldn't checkThe site didn't answer, or didn't let us read it.
What are security headers?
Short instructions a website sends with each page that tell browsers how to protect visitors, for example to use HTTPS only or to block other sites from framing the page.
Why do security headers matter?
They add a layer of protection for your visitors at almost no cost, and missing ones are an easy gap to close.
Is the security headers check free?
Yes. No sign-up and no card. It reads the response headers of your homepage once, and nothing about you is stored.