Yeah, the URL scheme is as follows: - https://pessimistress.github.io/ascii/ https://pessimistress.github.io/ascii/ - User: pessimistress - Repository: ascii

Yeah, the URL scheme is as follows: - https://pessimistress.github.io/ascii/ https://pessimistress.github.io/ascii/ - User: pessimistress - Repository: ascii But in this case, https://github.com/pessimistress/ascii https://github.com/pessimistress/ascii seems to be private, so seems source is not published at all. Seems sourcemaps is defined in the JS file, but points to a non-existing file, so can't help you either. Left is to use something like http://jsnice.org/ http://jsnice.org/ to "de-uglify" it and try to guess what it is doing.