Explainpaper
Highlights and explains academic jargon instantly
AI tool for understanding complex research papers. Highlight confusing text and get plain-language explanations instantly.
Opens official website
About Explainpaper
Explainpaper is an AI-powered tool for reading and understanding academic papers. Upload a PDF and Explainpaper provides an interactive reading experience: highlight any confusing term, sentence, or passage and receive an instant AI explanation in plain language. The tool is designed for researchers, students, and practitioners who regularly encounter papers outside their immediate expertise — dense methodology sections, unfamiliar mathematical notation, or field-specific jargon. Explainpaper can explain highlighted text at different levels of complexity, define technical terms in context, and summarize entire paper sections. Unlike ChatGPT, which requires you to manually paste text, Explainpaper keeps the paper and the AI explanations side by side in a clean interface. The free tier allows limited explanations per paper; Plus ($12/month) provides unlimited explanations and supports longer papers.
✅ Pros
- +Highlight any text in a paper and get an instant plain-language explanation — no copy-pasting required
- +Context-aware explanations understand the surrounding content, not just the highlighted text in isolation
- +Adjustable explanation depth: get a simple overview or a more technical breakdown of the same passage
- +Side-by-side layout keeps the paper visible while reading AI explanations
- +Saves paper reading sessions for revisiting later
❌ Cons
- −Free tier limits explanations per session — insufficient for reading a full complex paper
- −AI explanations can occasionally oversimplify or miss field-specific nuances
- −No citation analysis or related paper discovery — purely a reading comprehension tool
- −Plus plan at $12/month is relatively expensive for a single-purpose tool
Key Features
Highlight and Explain
The core interaction: highlight any word, sentence, equation, or paragraph in the uploaded PDF and receive an instant AI explanation in plain English. The AI uses the surrounding context of the paper — not just the highlighted text — to generate accurate, relevant explanations.
Paper Summary and Overview
Get a structured summary of the entire paper before diving in: what problem it addresses, the methodology used, key findings, and implications. Useful for quickly assessing whether a paper is worth reading in full.
Technical Term Definitions
Domain-specific jargon, mathematical symbols, and field-specific abbreviations are explained in context. Unlike a general dictionary, the definitions account for how the term is being used in the specific paper you're reading.
Pricing Plans
- ✓Limited explanations per paper
- ✓PDF upload
- ✓Basic highlight and explain
- ✓Unlimited explanations
- ✓Longer paper support
- ✓Save reading sessions
- ✓Priority processing
Prices, plan limits, and promotions may change. Verify final pricing on the official site.
🏆 Our Verdict
Explainpaper solves a specific, real problem: papers in adjacent fields are often technically rigorous but use terminology and conventions that take significant effort to decode. The highlight-and-explain interaction is genuinely faster than searching terms in isolation, because the AI understands context. It's not a replacement for deep domain knowledge, and experienced researchers in their primary field may find it less useful. But for graduate students, researchers exploring new territory, or practitioners engaging with technical literature, Explainpaper meaningfully lowers the barrier to understanding complex papers.
✅ Best For
Quick Info
- Pricing
- freemium
- Category
- research
- Rating
- 4.0 / 5.0
- Last Reviewed
- June 2026