hicross.jp/en/grammar
A free reference of 236 JLPT grammar patterns from N5 to N1 with English explanations, example sentences, and a flashcard study mode.
GrammarJLPT and other testsJLPTJLPT N1JLPT N2JLPT N3JLPT N4JLPT N5Sentence patternsSpaced repetitionFreeExample sentencesAdjectivesConditionalsCasual speech