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:media-cdn.tripadvisor.com/media/photo-l/0e/f6/df/df/dirty-bathroom.jp...
site title:
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
ETag 1f6d30bd95221440bb6394f9bf249030
Last-Modified Fri, 14 Apr 2017 08:50:07 GMT
Cache-Control max-age=2592000
X-Media-CDN 21491095
X-Media-CDN-Cache PASS
X-Media-CDN-Cache-Hits 0
Access-Control-Allow-Origin *
Timing-Allow-Origin htt????/www.tripadvisor.com
Via 1.1 varnish
Fastly-Debug-Digest 3bd76e27a61fb021abe9f503fadb59e584391dad75b3b5e55b34912dfceeaa7b
Content-Length 5402
Accept-Ranges bytes
Date Sat, 23 Jun 2018 19:36:46 GMT
Via 1.1 varnish
Age 531912
Connection keep-alive
X-Served-By cache-iad2143-IAD, cache-cdg20739-CDG
X-Cache HIT, MISS
X-Cache-Hits 1, 0
X-Timer S1529782607.847248,VS0,VE81

Load Info

page size5402
load time (s)0.012928
redirect count0
speed download0
server IP151.101.122.38


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