UglifyJS: Online JavaScript minifier

// Documentation of the options is available at https://github.com/mishoo/UglifyJS2
{
  parse: {
    strict: false
  },
  compress: {
    sequences     : true,
    properties    : true,
    dead_code     : true,
    drop_debugger : true,
    unsafe        : true,
    unsafe_comps  : true,
    conditionals  : true,
    comparisons   : true,
    evaluate      : true,
    booleans      : true,
    loops         : true,
    unused        : true,
    hoist_funs    : true,
    hoist_vars    : false,
    if_return     : true,
    join_vars     : true,
    cascade       : true,
    side_effects  : true,
    negate_iife   : true,
    screw_ie8     : false,

warnings      : true,
    global_defs   : {}
  },
  output: {
    indent_start  : 0,
    indent_level  : 4,
    quote_keys    : false,
    space_colon   : true,
    ascii_only    : false,
    inline_script : true,
    width         : 80,
    max_line_len  : 32000,
    beautify      : false,
    source_map    : null,
    bracketize    : false,
    semicolons    : true,
    comments      : /@license|@preserve|^!/,
    preserve_line : false,
    screw_ie8     : false
  }
}

UglifyJS 2 is an excellent tool to help you minify your JavaScript! It's a tried and tested tool, used by libraries such as jQuery.

This is a simple wrapper for the browser around the minifier; the hard work is done by Mihai Bazon. If you need an automated solution, I suggest checking out the source code, intended for Node.JS.

Do you want to help improve this tool? It's on Github.

This wrapper for the browser was created by Dan Wolff.