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:missnet.cz/fotos/2007/s/sl664/sl664.jp...
site title:
Url ContentJPEG Image
MIME Type / Internet Media Typeimage/jpeg
MIME Type image
File Extension.jpeg, .jpg
More Details (link to:)RFC 1314
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Header

HTTP/1.1 200 OK
Date Sun, 18 Aug 2019 01:38:27 GMT
Server Apache
Last-Modified Sun, 24 Jun 2007 13:46:49 GMT
ETag d79-433a720c24440
Accept-Ranges bytes
Content-Length 3449
Content-Type image/jpeg

Load Info

page size3449
load time (s)2.539854
redirect count0
speed download0
server IP217.11.236.114


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