From characters straight to Pinyin
To turn Pinyin with numbers to Pinyin with accents:
Or if you are using Microsoft Windows, PinyinTones will let you type Pinyin in many programs:
Or if you are using the Firefox browser, there is a handy plugin:
From Radical or four-digit Unicode code to character
For example, 5514 produces 唔 ng 'mm, all right'.
How to use this wiki software ("Confluence")
N.B. When editing the wiki, it's easiest to use this address: