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:cache1.skserver.nl/images/passage.gif redirected to: cache1.skserver.nl/images/passage.gi...
site title:
Url ContentGraphics Interchange Format
MIME Type / Internet Media Typeimage/gif
MIME Type image
File Extension.gif
More Details (link to:)Wikipedia: Graphics Interchange Format
Powered by: Very Tiny URL Shortener at https://vturl.net VeryTinyURL

Header

HTTP/1.1 301 Moved Permanently
Content-length 0
Location htt????/cache1.skserver.nl/images/passage.gif
Connection close
HTTP/1.1 200 OK
Server Apache/2.2.22 (Debian)
Last-Modified Wed, 15 Oct 2014 19:39:07 GMT
ETag 2c0e91-ab1-5057b4906030d
Cache-Control max-age=2592000, public
Content-Type image/gif
Content-Length 2737
Accept-Ranges bytes
Date Sun, 25 Aug 2019 12:42:05 GMT
X-Varnish 1057853009 1023447868
Age 2351555
Via 1.1 varnish
Connection close
X-Varnish-Cache HIT

Load Info

page size2737
load time (s)0.120793
redirect count1
speed download0
server IP149.210.156.187


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