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:secure.gravatar.com/avatar/b894142751a780721261ad6f7a2d570e?s=96&d=retro&r=...
site title:
Url ContentPortable Network Graphics (PNG)
MIME Type / Internet Media Typeimage/png
MIME Type image
File Extension.png
More Details (link to:)RFC 2083
Powered by: Very Tiny URL Shortener at https://vturl.net VeryTinyURL

Header

HTTP/1.1 200 OK
Server nginx
Date Thu, 24 May 2018 23:11:31 GMT
Content-Type image/png
Content-Length 9242
Connection keep-alive
Last-Modified Fri, 03 Jun 2016 07:44:41 GMT
Link <htt????/www.gravatar.com/avatar/b894142751a780721261ad6f7a2d570e?s=96&d=retro&r=g>; rel= canonical
Content-Disposition inline; filename= b894142751a780721261ad6f7a2d570e.png
Access-Control-Allow-Origin *
X-nc HIT cdg 4
Accept-Ranges bytes
Expires Thu, 24 May 2018 23:16:31 GMT
Cache-Control max-age=300
Source-Age 963908

Load Info

page size9242
load time (s)0.004931
redirect count0
speed download0
server IP192.0.73.2


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