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:ed.ted.com/on/o9mZuCA5 redirected to: ed.ted.com/on/o9mZuCA...
URL does not point to a web page (html/xhtml) or read error or page not found. (6404)
Url ContentHyperText Markup Language (HTML)
MIME Type / Internet Media Typetext/html
MIME Type text
File Extension.html
More Details (link to:)Wikipedia: HTML
Powered by: Very Tiny URL Shortener at https://vturl.net VeryTinyURL

Header

HTTP/1.1 301 Moved Permanently
Server Cowboy
Date Thu, 22 Feb 2018 22:19:27 GMT
Connection keep-alive
Content-Type text/html
Location htt????/ed.ted.com/on/o9mZuCA5
Cache-Control no-cache
X-Request-Id a21ed6e0-7964-4fc0-af5e-ead1b1294be5
X-Runtime 0.001374
Vary Accept-Encoding
Content-Encoding gzip
Via 1.1 vegur
HTTP/1.1 404 Not Found
Server Cowboy
Date Thu, 22 Feb 2018 22:19:27 GMT
Connection keep-alive
X-Frame-Options SAMEORIGIN
X-Xss-Protection 1; mode=block
X-Content-Type-Options nosniff
Content-Type text/html; charset=utf-8
X-Request-Id 6b538098-7ff6-471a-a9ac-c5ef7bf10ec4
X-Runtime 0.340943
Vary Accept-Encoding
Content-Encoding gzip
Via 1.1 vegur

Load Info

load time (s)0.865207
redirect count1
speed download0
server IP54.235.202.32


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