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:analytics.twitter.com/i/adsct?txn_id=nwc7o&p_id=Twitter&tw_sale_amount=0&tw_order_quantity=0 redirected to: analytics.twitter.com/i/adsct?txn_id=nwc7o&p_id=Twitter&tw_sale_amount=0&tw_order_quantity=...

Header

HTTP/1.1 301 Moved Permanently
content-length 0
date Mon, 23 Oct 2017 02:30:49 GMT
location htt????/analytics.twitter.com/i/adsct?txn_id=nwc7o&p_id=Twitter&tw_sale_amount=0&tw_order_quantity=0
server tsa_f
set-cookie personalization_id= v1_Q1jSRi6+GYBTN2dqImnFpA== ; Expires=Wed, 23 Oct 2019 02:30:49 UTC; Path=/; Domain=.twitter.com
set-cookie guest_id=v1%3A150872584978915865; Expires=Wed, 23 Oct 2019 02:30:49 UTC; Path=/; Domain=.twitter.com
x-connection-hash 510e99dcd8772f7ea8a5acd841e7d43d
x-response-time 101
HTTP/1.1 200 OK
cache-control no-cache, no-store, must-revalidate, pre-check=0, post-check=0
content-length 43
content-type image/gif;charset=utf-8
date Mon, 23 Oct 2017 02:30:49 GMT
expires Tue, 31 Mar 1981 05:00:00 GMT
last-modified Mon, 23 Oct 2017 02:30:49 GMT
pragma no-cache
server tsa_f
set-cookie personalization_id= v1_kZ8Gxf/R2a+Onw7K8P5RFw== ; Expires=Wed, 23 Oct 2019 02:30:49 UTC; Path=/; Domain=.twitter.com
status 200 OK
strict-transport-security max-age=631138519
x-connection-hash 1d7d7f25116075afb49318b053ab7ff5
x-content-type-options nosniff
x-frame-options SAMEORIGIN
x-response-time 108
x-transaction 0036c1d3005c4ae4
x-twitter-response-tags BouncerCompliant
x-xss-protection 1; mode=block

Load Info

page size43
load time (s)0.288623
redirect count1
speed download0
server IP104.244.42.195


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