Hanzi8, also known as Hanziba, is an online Chinese-language reference and learning platform offering free tools for exploring Chinese characters, vocabulary, idioms, poetry, and English words. Its resources include a character dictionary, Chinese word dictionary, idiom collection, and lookup tools for pronunciation, radicals, stroke counts, writing order, character structure, and polyphonic readings. Users can also find word-building examples, sentence examples, synonyms, antonyms, idiom chains, idiom stories, and calligraphy references.

The site reports a collection of more than 100,000 Chinese characters, 320,000 words, 50,000 idioms, 23,000 example sentences, and 840,000 literary texts, alongside thousands of quotations. It also provides poetry and classical-text resources, including Tang poetry and Song lyrics, as well as study materials on commonly confused characters and school-level vocabulary. Reference works featured on the site include the Kangxi Dictionary, Shuowen Jiezi, and other Chinese dictionaries. With search options organized by pinyin, radical, stroke count, and character lists, Hanzi8 serves learners and readers seeking practical, comprehensive Chinese-language reference materials.