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:qiita.com/elnora/items/5690d11177f95322b1d7 redirected to: qiita.com/elnora/items/5690d11177f95322b1d...
favicon.ico:
URL does not point to a web page (html/xhtml) or read error or page not found. (404)
Url ContentHyperText Markup Language (HTML)
MIME Type / Internet Media Typetext/html
MIME Type text
File Extension.html
More Details (link to:)Wikipedia: HTML
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Header

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Date Tue, 22 May 2018 17:54:14 GMT
Content-Type text/html
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HTTP/1.1 404 Not Found
Date Tue, 22 May 2018 17:54:16 GMT
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Connection keep-alive
Server nginx
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page size8608
load time (s)1.623395
redirect count1
speed download2289
server IP54.64.239.23


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