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=nuz8k&p_id=Twitter&tw_sale_amount=0&tw_order_quantity=0 redirected to: analytics.twitter.com/i/adsct?txn_id=nuz8k&p_id=Twitter&tw_sale_amount=0&tw_order_quantity=...

Header

HTTP/1.1 301 Moved Permanently
content-length 0
date Wed, 21 Feb 2018 03:06:23 GMT
location htt????/analytics.twitter.com/i/adsct?txn_id=nuz8k&p_id=Twitter&tw_sale_amount=0&tw_order_quantity=0
server tsa_b
set-cookie personalization_id= v1_8XnI/i8wUui+0+Th997vXw== ; Expires=Fri, 21 Feb 2020 03:06:23 UTC; Path=/; Domain=.twitter.com
set-cookie guest_id=v1%3A151918238347262915; Expires=Fri, 21 Feb 2020 03:06:23 UTC; Path=/; Domain=.twitter.com
x-connection-hash 2e98e60af07b8aa8f0773909efd7bc28
x-response-time 4
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 Wed, 21 Feb 2018 03:06:23 GMT
expires Tue, 31 Mar 1981 05:00:00 GMT
last-modified Wed, 21 Feb 2018 03:06:23 GMT
pragma no-cache
server tsa_b
set-cookie personalization_id= v1_adURmaExd0uAYU6UqH8+CQ== ; Expires=Fri, 21 Feb 2020 03:06:23 UTC; Path=/; Domain=.twitter.com
set-cookie guest_id=v1%3A151918238384358123; Expires=Fri, 21 Feb 2020 03:06:23 UTC; Path=/; Domain=.twitter.com
status 200 OK
strict-transport-security max-age=631138519
x-connection-hash 6a91d2824e2996384116e50ed7d6816c
x-content-type-options nosniff
x-frame-options SAMEORIGIN
x-response-time 12
x-transaction 004a6dc100d81f4c
x-twitter-response-tags BouncerCompliant
x-xss-protection 1; mode=block; report=htt????/twitter.com/i/xss_report

Load Info

page size43
load time (s)0.591559
redirect count1
speed download0
server IP104.244.42.131


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