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:pagead2.googlesyndication.com/pagead/js/r20171129/r20170110/osd.j...


HTTP/1.1 200 OK
P3P policyref= htt???/www.googleadservices.com/pagead/p3p.xml , CP= NOI DEV PSA PSD IVA IVD OTP OUR OTR IND OTC
Timing-Allow-Origin *
Date Wed, 21 Mar 2018 22:29:14 GMT
Expires Wed, 04 Apr 2018 22:29:14 GMT
Cache-Control public, max-age=1209600
Content-Type text/javascript; charset=ISO-8859-1
ETag 2004154093224904524
X-Content-Type-Options nosniff
Content-Disposition attachment; filename= f.txt
Content-Encoding gzip
Server cafe
Content-Length 28279
X-XSS-Protection 1; mode=block

Load Info

page size28279
load time (s)0.014169
redirect count0
speed download0
server IP216.58.208.194

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