The applet needs at least Netscape Navigator 4.06 or Internet Explorer 4.0 to run. It will not run on earlier versions of these browsers.
This tool will not convert characters to pinyin. It will also not convert pinyin to characters. It only works between different Romanizations (and Zhuyin Fuhao). The Zhuyin Fuhao, aka "BoPoMoFo", will likely display only as question marks. This will be corrected in the next release. Hanyu Pinyin in this tool uses numerals (1-4) to represent tone. Tone marks will be added as an option in the next release. Finally, umlauted letters (such as "u" or "o") can also be input using the convention of typing the un-umlauted letter followed by a colon (:).