JSBeautifier is also available as a command-line tool, python library, and a node package. Click on the link below to try out JSBeautifier now.
Try here: Click here to check out JSBeautifier.
Try here: Click here to check out Pretty Diff.
Try here: Click here to check out JS Pretty.
Try here: Click here to check out Minify.
Update 2022: This website doesn’t exist anymore. Other websites mentioned in this post.
Also check 3 free online tools to minify PHP files.