Paste any Japanese and find out what it's made of — and how much of it you already know.
Every kanji in the text, sorted by JLPT level. Sign in and it goes further: it compares them against the kanji you’ve studied and tells you the share you’d actually recognise, then offers the gaps as review cards.
Anything. A news article, a paragraph from a book, song lyrics, a message someone sent you, the description under a YouTube video you want to watch. It is most useful for deciding whether something is worth starting — which is the question that stops most people reading Japanese at all.
Looking for something to try it on? Immersion collects free Japanese news, radio and graded readers, and the dictionary has an example sentence on most entries.