Online Dictionary Network is a Chinese-language reference website focused on helping users look up and learn Chinese characters, words, and idioms. The site says its collection includes more than 100,000 Chinese characters and covers characters found in the Xinhua Dictionary, Kangxi Dictionary, and Shuowen Jiezi. For individual characters, visitors can search by pronunciation, radical, stroke count, or structure, and explore information such as meanings, five-element associations, stroke order, and related words.

The website also offers a range of language-learning and reference tools. These include Chinese, Kangxi, and Shuowen dictionaries; a Chinese word dictionary and idiom dictionary; character grouping and decomposition resources; and searches for synonyms and antonyms. Users can browse lists of common and less-common characters, multiple-pronunciation characters, and characters organized by components, structure, or number of strokes. The site presents itself as a practical resource for studying and exploring Chinese writing. It notes that some collected content has been compiled and edited by users and belongs to its original authors.