This is a basic conversion tool to create xiao'erjin Arabic script from hanyu pinyin. This tool was created by Kellen Parker van Dam in 2008 and updated July 2016.
To use, type Mandarin in pinyin in the text box on the left. After you hit "convert", you will see the xiao'erjin equivalent on the right. Note that xiao'erjin was never standardised, so you may see some variation between the output of this tool and the extant documentes written in the script.