The Javascript ROT13 decoder is a simple tool written in Javascript to encode/decode text using a very simple technique called ROT13. It was written as the result of a chance remark on usenet group alt.babylon5 - and, ultimately, done only to prove a point.
There exist plenty of other tools to perform the same task, and some news clients even handle the job themselves - but in spite of that, for many years, this page was one of the most visited pages on this site. These days - possibly as a result of usenet itself seeing something of a decline - that is no longer the case. However, because of its history, the tool remains online (with some minor improvements!)