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:img.mandarake.co.jp/aucimg/1/0/4/8/0000981048.octet-strea...
site title:
Url ContentJPEG Image
MIME Type / Internet Media Typeimage/jpeg
MIME Type image
File Extension.jpeg, .jpg
More Details (link to:)RFC 1314
Powered by: Very Tiny URL Shortener at https://vturl.net VeryTinyURL

Header

HTTP/1.1 200 OK
Last-Modified Wed, 23 Sep 2015 09:42:58 GMT
ETag 56027422-411d4
Server nginx/1.12.2
Content-Type image/jpeg
Content-Length 266708
Accept-Ranges bytes
Cache-Control public, max-age=86358
Expires Sat, 24 Aug 2019 20:40:20 GMT
Date Fri, 23 Aug 2019 20:41:02 GMT
Connection keep-alive

Load Info

page size266708
load time (s)0.709778
redirect count0
speed download0
server IP95.100.252.136


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