Deeppaper — Ai Pdf Reader

DeepPaper — Read papers deeply with AI. 100% free.

Highlight a passage, box a formula, or just ask — DeepPaper explains, summarizes, and answers instantly. No uploads. No accounts. Your paper stays on your device.

Why researchers love it:

Ask anything about the page you're reading — AI answers grounded in the actual content, not generic knowledge
Highlight and ask — select any text, type a question, get an instant answer
Box a formula or figure (coming soon) — circle anything you don't understand and let AI figure it out
Auto-expanding context — reads more pages when needed, so you don't have to copy-paste
Speaks your language — ask in English, Chinese, or any language; replies follow naturally. UI in English, 简体中文, 繁體中文.
Easy on the eyes — dark mode included
Built for academic papers, theses, and preprints. Completely free. No account required. Your PDF stays on your device — always.