I haven’t touched ㄅㄆㄇㄈ since the 70s. While I can recite all the zhuyin phonetics, I can only read them with extreme difficulty. Writing is a lost cause.

However, I’m great at pinyin.

Our local Chinese school instructs children in traditional Chinese characters and zhuyin phonetics. I was using BoPoMo Help, an iOS app with Zhuyin/pinyin conversion tables.

Update: The previous website mentioned no longer works.  Chinese Converter can be used to convert from Chinese or Pinyin to Zhuyin.

Input:

我喜歡上中文學校

Output:
ㄨㄛˇ ㄒㄧˇ ㄏㄨㄢ ㄕㄤˋ ㄓㄨㄥ ㄨㄣˊ ㄒㄩㄝˊ ㄒㄧㄠˋ