Free website analysis tools that will help you, find all this out :
Although designed primarily for those running Adwords campaigns, Google Analytics will provide detailed website traffic reports for anybody and any website. All you need to do is sign up for a Google account (free) and you're in business. Google Analytics provides detailed statistics about traffic to individual pages, average time spent on each page, bounce rate (how often a user hits one page on your site and then leaves), page entry and exit stats, keywords most often used in search engines to get to your pages and much, much more. Not nearly as idiot proof as Statcounter, but the stats are much more indepth and can be used to set up a comprehensive ROI analysis if you've spent considerable time and/or money getting traffic to your site.
W3C Markup Validation Service
This is a free service you can use to analyze all the HTML tags in your web pages to see if they conform with W3C Recommendations. This has a number of uses including making sure your web page is cross-browser compatible and spotting those errors you've made that are making your web page look all cockeyed. You can have it check web pages by either inputting a URL to your site, inputting HTML code into a text box or uploading files from your computer.
W3C CSS Validation Service
This is a free service you can use to analyze all the CSS you use in or along with your web pages to see if it conforms with the W3C Recommendations. After the analysis, if your CSS is good (according to their specifications) then it's termed as valid CSS. You can validate your CSS by inputting a URL to your site, directly inputting code or by uploading files from your computer.
Web Page Analyzer
This site has —among many other things— the best WHOIS lookup service I know of that can tell you what exists in your domain name's WHOIS public profile. It's important to check this now and then if only to make sure that the contact email you gave when you registered your domain name is an email address that you still frequently use. Many a domain name has expired simply because the domain name owner didn't get a renewal notice.http://www.dnsstuff.com/
Website Analysis Tools