I teach Mandarin... Learners read real Chinese pages with pop-up dictionaries that grab the longest string and list every meaning; that's where they get stuck (from experience).

Sooo, this splits the sentence into words and gives each the reading and meaning it has in that sentence: 行 is háng in 银行 and xíng in 不行; 不是 is said búshì. tone sandhi.

The hover uses no AI model: it's all our own dictionary and parser. Nothing is kept about the reader; the page text is cached for an hour so a shared link opens fast, and reading pages aren't indexed.

Works on phones and school computers where extensions can't install. A teacher can post one link to a class.

Honestly, rough spots: names and slang; sites behind a sign-in (Zhihu, WeChat) can't be read.