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:b.st-hatena.com/images/entry-button/button-only.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
Content-Type image/gif
Content-Length 254
Connection keep-alive
Date Sat, 01 Jun 2019 20:35:52 GMT
Server nginx
Last-Modified Wed, 20 Mar 2019 08:34:56 GMT
ETag 5c91fb30-fe
Expires Sun, 31 May 2020 20:35:52 GMT
Cache-Control max-age=31536000
X-Cache Hit from cloudfront
Via 1.1 25d6d48ccf183c90a9aeaef9670f9174.cloudfront.net (CloudFront)
X-Amz-Cf-Pop AMS1
X-Amz-Cf-Id ddTmmYucqr8QRKEjnsBi9PcReJysVUDiT__vmu4g0I4UE1KcehXGVQ==
Age 6806671

Load Info

page size254
load time (s)0.515661
redirect count0
speed download0
server IP52.85.250.49


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