jtalkonline.com/japanese-level/
Japanese Talk offers organized study materials for all levels including vocabulary, grammar, and kanji lessons aligned with JLPT levels, along with reading practice, tips, and Anki decks for self-study.
VocabularyGrammarJLPT and other testsJLPTHiraganaKatakanaBeginnerIntermediateAdvancedFreeSpaced repetition