東京の春はとても美しいです。桜の花が街中に咲き、人々は公園でお花見を楽しみます。上野公園や新宿御苑は特に人気があります。
春の東京では、温かい風が吹き、空は澄んだ青色になります。多くの観光客が日本を訪れるのもこの季節です。
Import articles, YouTube videos, PDFs, or photos. Look up words instantly, ask an AI tutor about grammar, and review vocabulary with spaced repetition — all in one place.
No signup. Works with YouTube videos and most articles.
東京の春はとても美しいです。桜の花が街中に咲き、人々は公園でお花見を楽しみます。上野公園や新宿御苑は特に人気があります。
春の東京では、温かい風が吹き、空は澄んだ青色になります。多くの観光客が日本を訪れるのもこの季節です。
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A full study dashboard behind every word you click

14
Languages supported
100%
Free to start
∞
Content sources
Input-based method
How it works
Paste a URL, upload a PDF, snap a photo, or let AI generate material at your level.
Read through native content. Click any word for instant definitions. Highlight and annotate as you go.
Saved words enter spaced repetition. Track streaks, daily goals, and progress to stay on track.
Features
Built around the idea that massive comprehensible input is the fastest path to fluency.
Paste URLs, upload PDFs, snap photos of textbooks — or paste raw text. Your real-world content becomes interactive study material.
Paste a YouTube link and study the transcript side-by-side with the video. Every word is clickable.
Select any word to see definitions, readings, and pronunciation instantly. No tab-switching, no copy-pasting.
Words you save go into spaced repetition with context sentences. The algorithm adapts to what you actually struggle with.
Describe a topic, pick a level, and get a full reading lesson generated in seconds. Never run out of material.
Confused by a sentence? Ask the AI tutor and get context-aware grammar explanations on the spot.
Structured learning
Whether you're preparing for JLPT, HSK, or just want a clear path forward — InputDojo builds a plan around your goals.
Tell the AI your target level, deadline, and focus areas. It generates a week-by-week plan with vocab targets, grammar milestones, reading goals, and direct links to the right exercises. Your plan adapts as you progress.
Goals
Custom targets
Weekly
Milestone plans
Adaptive
Updates with you
1-click
Jump to exercises
Japanese proficiency
Complete vocabulary, kanji, and grammar databases for every JLPT level. Mark what you know, drill what you don't, and track your coverage.
Chinese proficiency
Full HSK vocabulary, hanzi, and grammar reference with progress tracking. Know exactly where you stand for each level.
Context-aware help
Confused by a sentence? Ask the AI tutor while reading and get instant, context-aware grammar explanations. Save useful ones as Grammar Notes for review.
Languages
Every language gets the same full feature set — word lookup, SRS, grammar chat, and AI generation.