Bring any PDF. We add the AI tutor.
Upload your own books. Get context-aware AI explanations, translations in 30+ languages, and premium neural text-to-speech. Ask your PDF questions as you read.
PDF Reader with AI explanation panel — screenshot
Upload. Ask. Understand.
Context-aware explanations
Ask about any sentence or concept. The AI reads the entire document to understand surrounding context, previous definitions, and the author's teaching style.
Translate & restructure
Get passages translated into 30+ languages. The AI does two-step translation: first it restructures for clarity, then translates.
Listen with premium voices
AI explanations can be read aloud using neural voices from Google Cloud or Gemini. Adjust playback speed from 0.5× to 3×.
Chat naturally about your book
Ask follow-up questions. The AI maintains context across your entire conversation.
Bring your own book
We don't sell books. Adsorp is like an MP3 player — we don't sell music, but if you bring your MP3 files, we play them brilliantly.
Bring any PDF you own: textbooks, research papers, novels, course notes, scanned documents.
15+ teaching tones
Context-aware, not a dictionary
When you paste text into ChatGPT, it has no idea where that text came from. Adsorp's AI reads the surrounding pages — bidirectionally.
This is the difference between asking a stranger to explain a sentence versus asking someone who has read the whole chapter.
Why this kills the audiobook model
Audiobooks vs Adsorp TTS
Speed-decoupled TTS caching
Adsorp synthesizes audio once at 1× speed and caches it. When you play at 1.5× or 2×, the speed is applied client-side. This saves approximately 70% on TTS API costs.
Works offline. Completely.
Core PDF reading works without any internet connection. If you have Ollama running locally, AI features work too — for free, unlimited.