WebCookies logo Web Cookies Scanner

All-in-one free web application security tool. Web application vulnerability and privacy scanner with support for HTTP cookies, Flash, HTML5 localStorage, sessionStorage, CANVAS, Supercookies, Evercookies. Includes a free SSL/TLS, HTML and HTTP vulnerability scanner and URL malware scanner.

Websites setting X-Content-Type-Options HTTP header

Values

Most popular variants of the header value (we only show this when there's just a bunch of variants):

A non-standard but widely accepted header introduced originally by Microsoft to disable "content sniffing" or heuristic content type discovery in absence or mismatch of a proper HTTP Content-Type declaration, which led to a number of web attacks. In general, presence of the header with its only defined value of nosniff is considered as part of a properly secured HTTP response.

Reference...

We have seen 14200 websites setting the X-Content-Type-Options HTTP header and 27 unique values of this header.