Why_use_URL_shorteners_ by zhucezhao


									Why use URL shorteners?

Word Count:

URL shorteners create web addresses that are easy to type and don't get
mangled by word-wrap. But they hide the real address. Here's how to avoid
nasty surprises.

URL shortener, short URL, tiny URL, xaddr

Article Body:
You must have seen them. Web addresses like http://tinyurl.com/2gj2z3
which, when you click on them, take you to another web page. Why use
them? Are there any risks in using them?

URL stands for Uniform Resource Locator. It's the posh technical term for
a web address. Web addresses normally take the form
http://www.somesite.com/somepage.html, which is not too much of a
problem. But some site names can get very long, and so can page names.
The increased use of database-driven sites mean that URLs can get very
long indeed, and most of them is computer gobbledygook. They are
impossible to type in, if you are reading them in a print article, and
often get corrupted by word-wrapping when they appear in an email or blog

An URL shortener is a web service that takes a long address that's hard
to type, and turns it into a short one. You should use them in articles
for print publication, classified ads, emails, blog and forum postings,
anywhere there is a danger that the full address may be corrupted, or
that someone may need to type the address into a browser manually.

But there is a danger in using short URLs that may make people afraid to
use them. The short address disguises the real destination. This makes it
easy for somebody to post an innocent looking message encouraging people
to click on a link that takes them to a site which infects their computer
with spyware, or something equally undesirable.

Some URL shortening services have tried to address this problem. The most
well-known service, TinyURL.com, has an optional preview page that shows
you the target address before you go there. But you have to know to type
"preview" in front of the address, or visit the site and set it as a
permanent option. Those who don't know about this are still vulnerable to

A safe URL shortener would not allow the creation of links to undesirable
sites. It would also always display a preview page, so the user always
sees where the link is taking them before they go there. xaddr.com uses
Internet blacklists to prevent its use to disguise sites that are
advertised by spam. Its preview page offers a link to McAfee's Site
Advisor, which can be used to check the safety of the destination.

Next time you need to write a long web address, use an URL shortener. But
to encourage confidence that no harm will come from clicking the link,
pick a safe one.

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