Type pinyin and see it instantly converted to Zhuyin Fuhao (注音符號)!
Zhuyin is also known as “bopomofo” (ㄅㄆㄇㄈ) or Mandarin Phonetic Symbols.
Zhuyin King, the Mandarin Audio trainer available here.

Pinyin to Zhuyin

Convert Tones:

(Note: Unlike pinyin, the 1st tone is unmarked, and the 5th or neutral tone is marked by a dot. The 2nd, 3rd and 4th tone marks are the same as pinyin.)

Zhuyin to pinyin (experimental)