If you are not sure if the website you want to visit is safe, you can check it out here. Enter the address (url) of the website and see the invisible elements, such as a header or meta data.
site address:21stcenturywire.com/wp-content/uploads/2017/10/sddefault-2-1-280x150.jp...
Url ContentJPEG Image
MIME Type / Internet Media Typeimage/jpeg
MIME Type image
File Extension.jpeg, .jpg
More Details (link to:)RFC 1314
Powered by: Very Tiny URL Shortener at https://vturl.net VeryTinyURL

Header

HTTP/1.1 200 OK
Last-Modified Sat, 14 Oct 2017 00:07:59 GMT
ETag 2877-55b7690ed3eb8
Cache-Control max-age=5184000
Expires Fri, 23 Mar 2018 21:49:46 GMT
Content-Type image/jpeg
X-Port port_10541
X-Cacheable YES
Content-Length 10359
Date Mon, 22 Jan 2018 22:15:02 GMT
Age 1515
X-Cache cached
X-Cache-Hit HIT
X-Backend all_requests
Accept-Ranges bytes

Load Info

page size10359
load time (s)4.682241
redirect count0
speed download0
server IP198.71.233.195


* all occurrences of the string "http://" have been changed to "htt???/"