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:cdn.adacado.com/css/sprites.pn...
Url ContentPortable Network Graphics (PNG)
MIME Type / Internet Media Typeimage/png
MIME Type image
File Extension.png
More Details (link to:)RFC 2083
Powered by: Very Tiny URL Shortener at https://vturl.net VeryTinyURL

Header

HTTP/1.1 200 OK
Date Sat, 16 Dec 2017 07:07:15 GMT
Content-Type image/png
Content-Length 4837
Connection keep-alive
Last-Modified Mon, 23 Jan 2017 19:12:10 GMT
ETag 5886558a-12e5
Via 1.1 google
Alt-Svc clear
Server NetDNA-cache/2.2
X-Cache HIT
Accept-Ranges bytes

Load Info

page size4837
load time (s)0.09398
redirect count0
speed download0
server IP108.161.188.230


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