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:images.vinden.nl/px.gif?blocked&ip=213.251.182.10...
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/1.1 200 OK
Date Wed, 24 Oct 2018 05:56:36 GMT
Server Apache
Last-Modified Wed, 10 Jun 2009 10:37:03 GMT
ETag 6a17db-2b-46bfc0e5191c0
Accept-Ranges bytes
Content-Length 43
Content-Type image/gif
Connection keep-alive

Load Info

page size43
load time (s)0.263998
redirect count0
speed download0
server IP94.236.112.192


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