Imabi
A free, long grammar reference. Excellent for lookup. Too much to read as a first course.
IntermediateAdvancedFreeInvolvedGrammarWeb
Good fit if
- Learners who already have a beginner grammar path
- People who want a free reference beyond Tae Kim
- Readers who look up patterns from input
Look elsewhere if
- You are still learning kana
- You need scheduled retrieval practice
- A dense reference will stall you
Imabi is a large free grammar site. Lessons go from particles into constructions most beginner books never reach. It behaves like a reference shelf, not a 20-minute daily app.
Who it fits
Use it when a textbook note is too thin, or when you met a pattern in reading and need a fuller explanation. Intermediate learners get more from it than absolute beginners.
Limits
There is no review queue. Density can freeze a new learner. Pair it with Tae Kim as the first explanation source, or with Bunpro if the bottleneck is retrieval rather than explanation.
Sources checked
Product details can change. Evidence pages and their individual check dates appear below. Profile reviewed Aug 14, 2026.
- Imabi home official product · checked Aug 28, 2026 · Official product page used for the public description, platform, and current offering.