{"json_modified": "2016-10-16T13:33:12.095745", "uuid": "677c6e98-4eae-419c-bd4a-569913fcf696", "title": "X-Content-Type-Options", "url": "/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options", "tags": ["HTTP Headers", "Response Header", "Reference", "HTTP"], "translations": [], "modified": "2016-10-16T13:33:12", "label": "X-Content-Type-Options", "localization_tags": [], "locale": "en-US", "id": 192853, "last_edit": "2016-10-16T13:33:07", "summary": "The <code><strong>X-Content-Type-Options</strong></code> response HTTP header is a marker used by the server to indicate that the <a href=\"/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types\">MIME types</a> advertised in the <a href=\"/en-US/docs/Web/HTTP/Headers/Content-Type\" title=\"The Content-Type entity header is used to indicate the media type of the resource.\"><code>Content-Type</code></a> headers should not be changed and be followed. This allows to opt-out of <a href=\"https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types#MIME_sniffing\">MIME type sniffing</a>, or, in other words, it is a way to say that the webmasters knew what they were doing.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "Directives", "title": "Directives"}, {"id": "Specifications", "title": "Specifications"}, {"id": "Browser_compatibility", "title": "Browser compatibility"}, {"id": "See_also", "title": "See also"}], "slug": "Web/HTTP/Headers/X-Content-Type-Options", "review_tags": []}