UglifyJS: Online JavaScript minifier

As I type

// Documentation of the options is available at https://github.com/mishoo/UglifyJS
{
  annotations: true,
  nameCache: null,
  toplevel: false,
  ie8: false,
  v8: false,
  webkit: false,
  keep_fnames: true,
  warnings: false,

parse: {
    bare_returns     : false,
    html5_comments   : true,
    shebang          : true
  },
  compress: {
    annotations      : true,
    arguments        : true,
    arrows           : true,
    assignments      : true,
    awaits           : true,
    booleans         : true,
    collapse_vars    : true,
    comparisons      : true,
    conditionals     : true,
    dead_code        : true,
    default_values   : true,
    directives       : true,
    drop_console     : false,
    drop_debugger    : true,
    evaluate         : true,
    expression       : false,
    functions        : true,
    global_defs      : {},
    hoist_exports    : true,
    hoist_funs       : false,
    hoist_props      : true,
    hoist_vars       : false,
    if_return        : true,
    imports          : true,
    inline           : true,
    join_vars        : true,
    keep_fargs       : false,
    keep_infinity    : false,
    loops            : true,
    merge_vars       : true,
    negate_iife      : true,
    objects          : true,
    passes           : 5,
    properties       : true,
    pure_funcs       : null,
    pure_getters     : "strict",
    reduce_funcs     : true,
    reduce_vars      : true,
    rests            : true,
    sequences        : true,
    side_effects     : true,
    spreads          : true,
    strings          : true,
    switches         : true,
    templates        : true,
    top_retain       : null,
    toplevel         : false,
    typeofs          : true,
    unsafe           : false,
    unsafe_comps     : false,
    unsafe_Function  : false,
    unsafe_math      : false,
    unsafe_proto     : false,
    unsafe_regexp    : false,
    unsafe_undefined : false,
    unused           : true,
    varify           : true,
    yields           : true
  },
  mangle: {
    eval             : false,
    reserved         : [],
    toplevel         : false,
    properties       : false
  },
  output: {
    annotations      : false,
    ascii_only       : false,
    beautify         : false,
    braces           : false,
    comments         : /@license|@preserve|^!/,
    galio            : false,
    indent_level     : 4,
    indent_start     : 0,
    inline_script    : true,
    keep_quoted_props: false,
    max_line_len     : false,
    preamble         : null,
    preserve_line    : false,
    quote_keys       : false,
    quote_style      : 0,
    semicolons       : true,
    shebang          : true,
    width            : 80,
    wrap_iife        : false
  }
}

UglifyJS 3 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 the Uglify team. 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. Version uglify-es 3.3.9.

The minified output ()