JS Beautifier

...or, more specifically, all of the code powering jsbeautifier.org.

This little beautifier will reformat and reindent bookmarklets, ugly JavaScript, unpack scripts packed by Dean Edward’s popular packer, as well as deobfuscate scripts processed by javascriptobfuscator.com.

To beautify from the command-line you can use provided jsbeautifer.py script/library. Run it to see its usage information; e.g ./jsbeautifier.py file.js beautifies a file, output goes to stdout.

To use jsbeautifier.py as a library is simple:

import jsbeautifier
res = jsbeautifier.beautify('your javascript string')
res = jsbeautifier.beautify_file('some_file.js')

...or, to specify some options:

opts = jsbeautifier.default_options()
opts.indent_size = 2
res = jsbeautifier.beautify('some javascript', opts)

Note that only the HTML+JS version supports unpacking various packers.

You are free to use this in any way you want, in case you find this useful or working for you.

Written by Einar Lielmanis, einar@jsbeautifier.org

Thanks to Jason Diamond, Patrick Hof, Nochum Sossonko, Andreas Schneider, Dave Vasilevsky, Vital Batmanov, Ron Baldwin, Gabriel Harrison, Chris J. Hull, Mathias Bynens and others.