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:whatpeopleswant.com/wp-content/uploads/2019/05/The-Back-Pain-Breakthrough-PDF-e1557808710492.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 Mon, 23 Sep 2019 07:50:32 GMT
Server Apache
X-Frame-Options SAMEORIGIN
Last-Modified Tue, 14 May 2019 04:38:30 GMT
ETag 22143-588d19ac99d80
Accept-Ranges bytes
Content-Length 139587
Cache-Control s-maxage=10
Content-Type image/jpeg

Load Info

page size139587
load time (s)0.594122
redirect count0
speed download0
server IP99.79.159.216


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