When working with large and/or many Javascript and CSS files, what\'s the best way to reduce the file sizes?
Here are the online tools by which you can do this:-
For minifying java script codes, you can use Javascript Online Minifier Tool. This is currently best js minifier/un-minifiers
For minifying css codes, you can use CSS Minifier/Minify Tool. This is currently best css minifier/un-minifiers
Above are the tools which I seems to be useful for you.