What tests do you want to carry out?
Analyse the quality of your JavaScript with JSLint. Available to all account holders.
Check all links, report those that do not work. Available to all account holders.
Use HTTP authentication when accessing a site being tested. Available to all account holders.
For when your site or page uses either basic or digest HTTP authentication. Commonly used for public staging sites. Not safe for sensitive information.
For sites that use cookies for authentication or for user-specific content. Available to all account holders.
For testing sites that use cookies for authentication or for user-specific content. Add any number of cookies.