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:d33wubrfki0l68.cloudfront.net/cf74ad547050398ddf2739a044db33f1e3865033/ca155/images/smashing-book-5.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
Content-Type image/jpeg
Content-Length 50815
Connection keep-alive
Accept-Ranges bytes
Access-Control-Allow-Origin *
Cache-Control public, max-age=31556926
Date Thu, 09 Nov 2017 12:04:18 GMT
ETag 9506fc3b978abcad8c38bc54b0c9d195dd7fa411
Server Netlify
Age 1159744
X-Cache Hit from cloudfront
Via 1.1 b7e7cd319ec31b533acb1e9e4b737331.cloudfront.net (CloudFront)
X-Amz-Cf-Id SYwVCmzglulQh3UZ7cQtohQ8HlFdkzVgk2nrjn3JJQedKtcYPL0n_w==

Load Info

page size50815
load time (s)0.041291
redirect count0
speed download0
server IP52.222.168.76


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