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/b/bd134/bd134.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 Sat, 25 May 2019 10:55:35 GMT
Server Apache
Last-Modified Sat, 23 Jun 2007 19:28:57 GMT
ETag 123d-43397ca7b5040
Accept-Ranges bytes
Content-Length 4669
Content-Type image/jpeg

Load Info

page size4669
load time (s)1.5383
redirect count0
speed download0
server IP217.11.236.114


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