Every kanji is built from smaller parts. The most important of those parts — the radical — is what dictionaries use to classify it. Learn the 120+ common radicals covered here and the wall of 2,000+ jōyō kanji turns into modular building blocks.
Start with the overview and the seven positions, then browse the category cards. Each radical card shows the form, its name, position, and example kanji you can click to see meanings.