If you’re a regular on Twitter, you understand the importance of a URL shortener. With only 140 precious characters, filling them with a long, awkward URL is just wasteful. Even though a few of these shortening services were created pre-Twitter, they have become popular as the micro-blogging service has.

Some provide you with analytics and tracking, and some simply give you a shorter URL. Check out a few of the URL shorteners that we’ve come across lately:

TinyURL.com

As the first URL shortener to be developed, TinyURL was also the first shortening service I heard of and saw being used in the Twittersphere. Developed to prevent broken links in e-mail messages, this service offers the basics. You can copy and paste any URL into the generator to create a random URL or one with a custom name, and these URLs will never expire.




Is.gd

Is.gd is very similar to TinyURL in that it offers basic features. The big advantage to is.gd is the length of the domain itself and the guaranteed shortness of URLs it creates. This service guarantees all URLs will be less than 18 characters and most end up being less than 11 characters. What does this mean? Is.gd is preferred among Twitter users to TinyURL because the length of the shortened URLs leave even more characters for the rest of the tweet. These URLs will also last forever.




Ow.ly & ht.ly

Developed by hootsuite, Ow.ly offers similar basic features as the previously mentioned tools. Recently Ow.ly added a new service called ht.ly which is preferred by marketers because it adds a branded bar to the top of any linked or shared page. No matter which service you choose, you have the same access to click-through data, broken down by region or date, and spliced according to custom metrics. These service do not need to be linked with hootsuite but are integrated.




Bit.ly

Bit.ly was originally developed in response to TinyURL in order to offer a shorter and more robust option for Twitter users. Links shortened with bit.ly are automatically saved on a dashboard that bit.ly users can then use to view metric like total views, referrer domains (Twitter, e-mail, etc) and location of clicks. Bit.ly also offers a sidebar feature which can be easily integrated into any web browser and lets users easily shorten a page without going to the bit.ly website. This sidebar also allows for seamless sharing on Twitter.




Cli.gs

While I haven’t yet seen this URL shortener too much around Twitter, cli.gs offers the most robust metrics and data analysis options of featured shortening services. Cli.gs allows users to view the exact time at which each click was received, if a link was mentioned on Twitter or Friendfeed or blogs or websites and which of these sent traffic back to your link. Unique to cli.gs, users can create links which take viewers from different countries to different landing pages.




Yourls

As URL shorteners became more and more popular, every brand and company decided they wanted their own (e.g., Google, Coke and StumbleUpon). Wel, now you can have a URL shortener, too, thanks to Yourls. This service is a set of PHP scripts that lets you build your own URL shortener, which you can then keep private, make public and integrate into your blog. It’s pretty simple and there’s a great explanation of how to set one up using Yourls. This option does not give you metrics like some others, but how cool would it be to have your own URL shortener? Re.becca, anyone?




What URL shorteners are you using?