Please implement an online live version like Google Closure Compiler http://closure-compiler.appspot.com/home, Uglifyjs http://marijnhaverbeke.nl/uglifyjs and CSSO http://css.github.com/csso/csso.html

Apparently, CSSO is the best CSS optimizer thus far with few glitches described here on stackoverflow. Also, take a look at how can Google Closure be the worst compressor in the comments under this answer.

I wish you implement the number 1 "best of the best" optimizing techniques for CSS and JS and provide an online version of your app !!  I hope you provide the link to online version on the project Home page soon.  :-)

Yeah, I admit we haven't invested a lot in the CSS minification side of AjaxMin. It's pretty basic and hasn't changed significantly; it doesn't even generate an abstract syntax tree as it's processing the input. It's on the to-do list to alter the architecture to generate an AST, at which point we can start massaging the parsed rules and declarations to produce the same results as the source through combining and eliminating stuff. Just isn't high in the priority list. Someday.

We've also thought about hosting an online version, but this is the first time anyone has actually asked for one, so it too has fallen way down the priority list of Things To Do. There currently are no plans to build or deploy one, although there is nothing stopping anyone else from creating an ASP.NET site that uses the DLL version of AjaxMin to take input from users, minify it, and return the results (as long as AjaxMin is referenced and given due credit as per the license agreement). We've gone through the security review process to get the AllowPartiallyTrustedCallers attribute added to the DLL assembly, specifically so the DLL can be called from ASP.NET applications.