Thanks for your reply.I would have liked to use splunk with less on client side ... But ok, I compile my .less file to .css from the command line and it works fine. Just for info : due to my enterprise policy, I'm not able to install software on my computer. But I achieved this by installing Node.js via portable Apps, configuring the proxy in .npmrc file and then installing less using this command : "npm install less". Using "lessc my_less_file.less my_css_file.css" is compiling the css file.