Chinese idiom (成语) look-up, word-chain game and structure filters — all in your browser.
Three idiom tools sharing one built-in corpus. Dictionary: type a character to list every idiom containing it (common ones show a gloss). Chain game: enter a starting character or idiom, the app builds the longest greedy chain by matching each idiom’s last character to the next one’s first. Structure filter: pick a pattern — AABB (高高兴兴), ABCC (波光粼粼), AABC (欣欣向荣), ABAC (自言自语), idioms containing a digit, or containing a zodiac-animal character. Click any underlined idiom to start a chain from it. The corpus is a curated set of common idioms, not exhaustive.