Minify Javascript Input JavaScript Minified Output About Sharedhow JSMinifier Sharedhow JSMinifier is an online Javascript minifier that allow you to minify your Javascript files up to 80% of original file size. Copy and paste your code or can upload files and then compress. Why You Should Minify JavaScript Make your website super fast Reduce bandwidth consumption of your website Whitespace and comments are not needed for Javscript excetion, along with the use of shorter variable name and functions, it speed up script ecution time.