Bit.ly preview extension makes it easy to know where bit.ly link goes to,  especially necessary on sites like twitter where malware authors can spread malicious links through bit.ly links, sites like URL X-ray and Untiny retrieves original URL for a shortened link, but those  works only for individual URLs. Is there a possibility to preview /know almost every shortened URL goes to in twitter, yes.

Related 11 Tips to Secure Your Twitter Account

LongURL service automatically expands short URLs to original URLs.  Currently LongURL expands shortened links from 330+ URL shortener services includes goo.gl, tinyurl and bit.ly. LongURL currently available as Firefox and Chrome extensions.

know where any short URL leads to in twitter

LinkPeelr is another URL expander available for Chrome as extension that takes a URL and peels it to show you the URL that you’ll actually will be taken to.

preview almost any short URL in twitter