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:www.larioja.org/larioja-client/imagenes/popup/popup_small.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/1.1 200 OK
Date Thu, 24 May 2018 08:00:53 GMT
Server Apache
Accept-Ranges bytes
ETag W/ 901-1489052944000
Last-Modified Thu, 09 Mar 2017 09:49:04 GMT
Content-Length 901
Vary User-Agent
Content-Type image/gif
Connection close

Load Info

page size901
load time (s)0.087479
redirect count0
speed download0
server IP195.55.164.50


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